Bsi bs 2a 229 1972 (2000)
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BRITISH STANDARD AEROSPACE SERIES
BS 2A
229:1972
Incorp orating
Am endm ent Nos .
and 3
Specification for
Hexagonal head steel
bolts 1100 MPa
UD C 62 9 . 7 : 62 1 . 882 . 2 1 1 : 669 . 1 4
1,
2
BS 2A 229:1972
This Britis h S tandard, having
b een ap p roved b y the
Aeros p ace I ndus try S tandards
C ommittee and endors ed b y
the C hairman of the E ngineering
D ivis ional C ouncil, was
p ub lis hed under the authority
of the General C ouncil of
Amendments issued since publication
the I ns titution on
1 2 S ep tem b er 1 9 72
Amd. No.
D ate of is s ue
21 29
O ctob er 1 976
2 81 4
Ap ril 1 9 79
61 42
D ecemb er
C omments
© BS I 0 2 - 2 0 00
The following BS I reference
relates to the work on this
s tandard:
C om mittee reference AC E /1 2
D raft for ap p roval 7 1 /3 5 45 3
ISBN 0 580 07085 9
1 99 0
Indicated b y a s ideline in the margin
BS 2A 229:1972
Contents
Page
1
Scope
1
2
General requirement
1
3
Material and manufacture
1
4
D imensions
1
5
Screw threads
1
6
Anti- corrosion treatment
1
7
Identification and marking
1
Appendix A O versize b olts
Inside back cover
Appendix B Table for the conversion of inches to
millimetre equivalents
Figure 1
2
Figure 2
2
Figure 3
3
Figure 4
3
Table 2 — Bearing length
© BSI 02 - 2 000
Inside back cover
L
and overall length
E
3
i
BS 2 A 2 2 9: 1 97 2
This revision of BS A229: 1 968 has been prepared to incorporate Amendment Slip
No. 1 : 1 969 (AMD 1 95, ) and also to extend the size range to
include
9
/1 6–1 8 to 1 1 /4–1 2 UNJF bolts. Dimensions for oversize bolts are given in
Appendix A.
It provides a range of 1 1 00 MPa to 1 250 MPa steel bolts with UNJ profile
threads and close tolerance shanks for aircraft use. The lengths of the bolts are in
fractional increments.
This standard requires reference to the following British Standards:
Unified screw threads of “UNJ” basic profile.
BS A 1 00, General requirements for bolts and nuts of tensile strength not
exceeding 1 250 MPa.
BS S 1 47, Nickel-chromium-molybdenum steel (bar for the manufacture of
forged bolts only).
BS S 1 48, Low nickel-chromium steel (bar for the manufacture of forged bolts
only).
BS S 1 49, 1.75 per cent nickel-chromium-molybdenum steel.
BS S . . . , 1 % chromium-molybdenum steel bars for the manufacture of forged
bolts and forged nuts .
BS 4084,
1)
NOTE 1
The values in imperial units are to be regarded as the standard. The table in
Appendix A provides millimetre equivalents of inch dimensions and is based on the tables in BS 350,
Conversion factors and tables”.
1 MPa = 1 N/mm = 1 MN/m = 1 45. 0 lbf/in . Information on SI units is given in BS 3763,
“The International System of units (SI) ”.
“
NOTE 2
2
2
2
A British Standard does not purport to include all the necessary provisions of a
contract. Users of British Standards are responsible for their correct application.
C omp liance with a British S tand ard d oe s no t of itse lf confe r immunity
from le gal ob ligatio ns.
S ummary of p age s
This document comprises a front cover, an inside front cover, pages i and ii,
pages 1 to 1 0, an inside back cover and a back cover.
This standard has been updated (see copyright date) and may have had
amendments incorporated. This will be indicated in the amendment table on the
inside front cover.
1)
ii
In course of preparation.
© BSI 02- 2000
BS 2A 229:1 972
1 Scope
4 Dimensions
This British Standard specifies the materials,
4.1 All bolts, after application of the ant-corrosion
dimensions, finish and inspection requirements for coating, shall conform to the dimensions and
cadmium plated steel bolts with hexagonal heads tolerances given in Table 1 and Table 2 or
and Unified threads for aircraft use.
Appendix A.
4.2 The run-out of the thread shall comply with the
2 General requirement
relevant requirements of BS A 100.
The bolts shall be manufactured, inspected and
4.3 The nominal length of the bolt shall be the
tested in accordance with the requirements of
bearing length L.
BS A 100.
4.4 Dimensions of oversize bolts are given in
Appendix
A.
3 Material and manufacture
3.1 The bolts shall be forged from material which
complies with the latest issue of one of the following
British Standards:
BS S 147
or BS S 148
or BS S 149
or BS S ... 2) .
3.2 In the finally heat-treated condition, the
mechanical properties of the material used for
forged bolts shall be as follows:
0.2 % proof stress
not less than 965 MPa
Tensile strength
not less than 1 100 MPa
Elongation
on 5.65 Ỉ S0
not less than 10 %
5 Screw threads
The screw threads shall conform to the basic thread
form, diameter and related pitches specified in
BS 4084, “Unified screw threads of “UNJ” basic
profile (Class 3A)”.
6 Anti-corrosion treatment
All bolts shall be coated with cadmium, in
accordance with the relevant requirements of
BS A 100.
7 Identification and marking
The bolts shall be marked on the top face of the head
with the number of this British Standard and the
relevant part numbers shown in Table 2,
e.g. 2A 229E62.
Oversize bolts shall be marked as state in
Appendix A.
2) In course of preparation.
© BSI 02-2000
1
2
1
0.2495
0.3120
0.3745
0.4370
0.4995
0.5615
0.6240
0.7490
0.8740
0.9990
1.1240
1.2490
0.2500
0.3125
0.3750
0.4375
0.5000
0.5625
0.6250
0.7500
0.8750
1.0000
1.1250
1.250
/4–28
/16–24
/8–24
/16–20
/2 –20
/16–18
/8–18
/4–16
/8–14
5
3
7
1
9
5
3
7
1–12
1
1 /4–12
1
1 /8–12
0.1895
0.1900
in
Max.
A
1.2475
1.1225
0.9980
0.8730
0.7480
0.6230
0.5605
0.4985
0.4360
0.3735
0.3110
0.2485
0.1885
in
Min.
portion of shank
10–32
in
size
of nominal
equivalent
1
UNJF
size
4
Diameter of plain
3
Figure 1
×
in
pitch
0.167
0.167
0.167
0.143
0.125
0.111
0.111
.100
.100
.083
.083
.071
.063
2
5
L and overall length E see Table 2
Decimal
2
For bearing length
Nominal
*
1.651
1.463
1.314
1.195
1.057
0.921
0.859
0.757
0.631
0.615
0.506
0.443
0.381
in
only)
(reference
T min.
6
1.814
1.627
1.440
1.252
1.064
0.940
0.877
0.752
0.690
0.564
0.502
0.439
0.376
in
Max.
B
8
in
Min.
1.801
1.614
1.427
1.239
1.052
0.928
0.865
0.741
0.679
0.553
0.492
0.430
0.367
flats
Figure 2
10
2.071
1.856
1.643
1.429
1.214
1.073
1.001
0.868
0.797
0.651
0.580
0.507
0.434
in
Max.
in
Min.
2.055
1.842
1.628
1.414
1.200
1.059
0.987
0.845
0.775
0.631
0.561
0.491
0.419
C
corners
Width across
9
12
0.640
0.577
0.515
0.453
0.390
0.327
0.296
0.265
0.234
0.203
0.171
0.140
0.125
in
Max.
in
Min.
0.625
0.562
0.500
0.438
0.375
0.312
0.281
0.250
0.219
0.188
0.156
0.125
0.110
D
of head
Thickness
11
14
0.075
0.070
0.060
0.050
0.045
0.040
0.035
0.030
0.030
0.025
0.025
0.025
0.025
in
Max.
R
0.060
0.055
0.045
0.035
0.030
0.025
0.020
0.020
0.020
0.015
0.015
0.015
0.015
in
Min.
bolt head
G
1.114
0.990
0.865
0.754
0.640
0.524
0.462
0.406
0.344
0.292
0.229
0.174
0.120
in
± 0.010
chamfer
of
Diameter
15
Third angle projection
Radius under
13
Alternative form of bolt head at the option of the bolt manufacturer
Width across
7
NOTE It is permissible to suitable chamfer the blank prior to thread rolling
operation without any subsequent machining provided dia G and the max.
runout of thread at bolt end are maintained.
BS 2A 229:1 972
© BSI 02-2000
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
NO TE
L
and ove rall le ngth
E
Unallocated part numbers should not be used.
Figure 3
Figure 4
1
No . 1 0 –3 2 UNJF
Part
No .
±
L
0.01 0
in
±
E
Part
0.01 5
No .
±
L
0.01 0
in
in
5
/4 –2 8 UNJ F
±
E
Part
0.01 5
No.
in
/1 6–2 4 UNJF
±
L
0.01 0
in
±
E
0.01 5
in
D2
0. 1 2 5
0. 531
D3
0. 1 88
0. 594
E3
0. 1 88
0. 656
G3
0. 1 88
0. 71 9
D4
0. 2 50
0. 656
E4
0. 2 50
0. 71 8
G4
0. 2 50
0. 781
D5
0. 31 2
0. 71 8
E5
0. 31 2
0. 780
G5
0. 31 2
0. 843
D6
0. 375
0. 781
E6
0. 375
0. 843
G6
0. 375
0. 906
D7
0. 438
0. 844
E7
0. 438
0. 906
G7
0. 438
0. 969
D8
0. 500
0. 906
E8
0. 500
0. 968
G8
0. 500
1 . 031
D9
0. 562
0. 968
E9
0. 562
1 . 030
G9
0. 562
1 . 093
D1 0
0. 62 5
1 . 031
E1 0
0. 62 5
1 . 093
G1 0
0. 62 5
1 . 1 56
D1 1
0. 688
1 . 094
E1 1
0. 688
1 . 1 56
G1 1
0. 688
1. 219
D1 2
0. 750
1 . 1 56
E1 2
0. 750
1. 218
G1 2
0. 750
1 . 2 81
D1 3
0. 81 2
1 . 21 8
E1 3
0. 81 2
1 . 2 80
G1 3
0. 81 2
1 . 343
D1 4
0. 875
1 . 2 81
E1 4
0. 875
1 . 343
G1 4
0. 875
1 . 406
D1 5
0. 938
1 . 344
E1 5
0. 938
1 . 406
G1 5
0. 938
1 . 469
D1 6
1 . 000
1 . 406
E1 6
1 . 000
1 . 468
G1 6
1 . 000
1 . 531
D1 7
1 . 062
1 . 468
E1 7
1 . 062
1 . 530
G1 7
1 . 062
1 . 593
D1 8
1. 125
1 . 531
E1 8
1 . 125
1 . 593
G1 8
1 . 1 25
1 . 656
D1 9
1 . 1 88
1 . 594
E1 9
1 . 1 88
1 . 656
G1 9
1 . 1 88
1 . 71 9
D20
1 . 2 50
1 . 656
E20
1 . 2 50
1 . 71 8
G2 0
1 . 2 50
1 . 781
D21
1 . 31 2
1 . 71 8
E21
1 . 31 2
1 . 780
G2 1
1 . 31 2
1 . 843
D22
1 . 375
1 . 781
E22
1 . 375
1 . 843
G2 2
1 . 375
1 . 906
D23
1 . 438
1 . 844
E23
1 . 438
1 . 906
G2 3
1 . 438
1 . 969
D24
1 . 500
1 . 906
E24
1 . 500
1 . 968
G2 4
1 . 500
2 . 031
D25
1 . 562
1 . 968
E25
1 . 562
2 . 030
G2 5
1 . 562
2 . 093
D26
1 . 62 5
2 . 031
E26
1 . 62 5
2 . 093
G2 6
1 . 62 5
2 . 1 56
D27
1 . 688
2 . 094
E27
1 . 688
2 . 1 56
G2 7
1 . 688
2. 21 9
D28
1 . 750
2 . 1 56
E28
1 . 750
2. 21 8
G2 8
1 . 750
2 . 2 81
D29
1 . 81 2
2. 21 8
E29
1 . 81 2
2 . 2 80
G2 9
1 . 81 2
2 . 343
D 30
1 . 875
2 . 2 81
E 30
1 . 875
2 . 343
G30
1 . 875
2 . 406
D 31
1 . 938
2 . 344
E 31
1 . 938
2 . 406
G31
1 . 938
2 . 469
© BSI 02 - 2 000
3
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
1
No . 1 0 –3 2 UNJ F
P art
No .
±
L
0.01 0
in
±
E
0.01 5
Part
No .
in
L
and o ve rall le ngth
5
/4 –2 8 UNJ F
±
L
0.01 0
in
E
±
E
0.01 5
Part
No .
in
/1 6 –2 4 UNJ F
±
L
0.01 0
in
±
E
0.01 5
in
D 32
2 . 000
2 . 406
E32
2 . 000
2 . 468
G32
2 . 000
2 . 531
D 34
2. 125
2 . 531
E34
2. 1 25
2 . 593
G34
2. 1 25
2 . 656
D 36
2 . 2 50
2 . 656
E36
2 . 2 50
2 . 71 8
G36
2 . 2 50
2 . 781
D 38
2 . 375
2 . 781
E38
2 . 375
2 . 843
G38
2 . 375
2 . 906
D 40
2 . 500
2 . 906
E40
2 . 500
2 . 968
G40
2 . 500
3. 031
D 42
2 . 62 5
3. 031
E42
2 . 62 5
3. 093
G42
2 . 62 5
3. 1 56
D 44
2 . 750
3. 1 56
E44
2 . 750
3. 2 1 8
G44
2 . 750
3. 2 81
D 46
2 . 875
3. 2 81
E46
2 . 875
3. 343
G46
2 . 875
3. 406
D 48
3. 000
3. 406
E48
3. 000
3. 468
G48
3. 000
3. 531
D 50
3. 1 2 5
3. 531
E50
3. 1 2 5
3. 593
G50
3. 1 2 5
3. 656
D 52
3. 2 50
3. 656
E52
3. 2 50
3. 71 8
G52
3. 2 50
3. 781
D 54
3. 375
3. 781
E54
3. 375
3. 843
G54
3. 375
3. 906
D 56
3. 500
3. 906
E56
3. 500
3. 968
G56
3. 500
4. 031
D 58
3. 62 5
4. 031
E58
3. 62 5
4. 093
G58
3. 62 5
4. 1 56
D 60
3. 750
4. 1 56
E60
3. 750
4. 2 1 8
G60
3. 750
4. 2 81
D 62
3. 875
4. 2 81
E62
3. 875
4. 343
G62
3. 875
4. 406
D 64
4. 000
4. 406
E64
4. 000
4. 468
G64
4. 000
4. 531
D 66
4. 1 2 5
4. 531
E66
4. 1 2 5
4. 593
G66
4. 1 2 5
4. 656
D 68
4. 2 50
4. 656
E68
4. 2 50
4. 71 8
G68
4. 2 50
4. 781
D 70
4. 375
4. 781
E70
4. 375
4. 843
G70
4. 375
4. 906
D 72
4. 500
4. 906
E72
4. 500
4. 968
G72
4. 500
5. 031
D 74
4. 62 5
5. 031
E74
4. 62 5
5. 093
G74
4. 62 5
5. 1 56
D 76
4. 750
5. 1 56
E76
4. 750
5. 2 1 8
G76
4. 750
5. 2 81
D 78
4. 875
5. 2 81
E78
4. 875
5. 343
G78
4. 875
5. 406
D 80
5. 000
5. 406
E80
5. 000
5. 468
G80
5. 000
5. 531
D 82
5. 1 2 5
5. 531
E82
5. 1 2 5
5. 593
G82
5. 1 2 5
5. 656
D 84
5. 2 50
5. 656
E84
5. 2 50
5. 71 8
G84
5. 2 50
5. 781
D 86
5. 375
5. 781
E86
5. 375
5. 843
G86
5. 375
5. 906
D 88
5. 500
5. 906
E88
5. 500
5. 968
G88
5. 500
6. 031
D 90
5. 62 5
6. 031
E90
5. 62 5
6. 093
G90
5. 62 5
6. 1 56
D 92
5. 750
6. 1 56
E92
5. 750
6. 2 1 8
G92
5. 750
6. 2 81
D 94
5. 875
6. 2 81
E94
5. 875
6. 343
G94
5. 875
6. 406
D 96
6. 000
6. 406
E96
6. 000
6. 468
G96
6. 000
6. 531
4
© BSI 02 - 2 000
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
NO TE
L
and o ve rall le ngth
E
Unallocated part numbers should not be used.
Figure 3
3
Part
No .
Figure 4
7
/8 –2 4 UNJ F
±
L
0.01 0
in
±
E
Part
0.01 5
No .
±
L
0.01 0
in
in
1
/1 6 –2 0 UNJ F
±
E
Part
0.01 5
No .
/2 –2 0 UNJF
±
L
0.01 0
in
in
±
E
0.01 5
in
J4
0. 2 50
0. 891
L4
0. 2 50
0. 906
J5
0. 31 2
0. 954
L5
0. 31 2
0. 968
N5
0. 31 2
1 . 094
J6
0. 375
1 . 01 6
L6
0. 375
1 . 031
N6
0. 375
1 . 1 57
J7
0. 438
1 . 079
L7
0. 438
1 . 094
N7
0. 438
1 . 220
J8
0. 500
1 . 1 41
L8
0. 500
1 . 1 56
N8
0. 500
1 . 2 82
J9
0. 562
1 . 2 03
L9
0. 562
1. 218
N9
0. 562
1 . 334
J1 0
0. 62 5
1 . 2 66
L1 0
0. 62 5
1 . 2 81
N1 0
0. 62 5
1 . 407
J1 1
0. 688
1 . 32 9
L1 1
0. 688
1 . 344
N1 1
0. 688
1 . 470
J1 2
0. 750
1 . 391
L1 2
0. 750
1 . 406
N1 2
0. 750
1 . 532
J1 3
0. 81 2
1 . 453
L1 3
0. 81 2
1 . 468
N1 3
0. 81 2
1 . 594
J1 4
0. 875
1 . 51 6
L1 4
0. 875
1 . 531
N1 4
0. 875
1 . 657
J1 5
0. 938
1 . 579
L1 5
0. 938
1 . 594
N1 5
0. 938
1 . 72 0
J1 6
1 . 000
1 . 641
L1 6
1 . 000
1 . 656
N1 6
1 . 000
1 . 782
J1 7
1 . 062
1 . 703
L1 7
1 . 062
1 . 71 8
N1 7
1 . 062
1 . 844
J1 8
1. 125
1 . 766
L1 8
1 . 125
1 . 781
N1 8
1 . 1 25
1 . 907
J1 9
1 . 1 88
1 . 82 9
L1 9
1 . 1 88
1 . 844
N1 9
1 . 1 88
1 . 970
J2 0
1 . 2 50
1 . 891
L2 0
1 . 2 50
1 . 906
N2 0
1 . 2 50
2 . 032
J2 1
1 . 31 2
1 . 953
L2 1
1 . 31 2
1 . 968
N2 1
1 . 31 2
2 . 094
J2 2
1 . 375
2 . 01 6
L2 2
1 . 375
2 . 031
N2 2
1 . 375
2 . 1 57
J2 3
1 . 438
2 . 079
L2 3
1 . 438
2 . 094
N2 3
1 . 438
2. 220
J2 4
1 . 500
2 . 1 41
L2 4
1 . 500
2 . 1 56
N2 4
1 . 500
2 . 2 82
J2 5
1 . 562
2 . 2 03
L2 5
1 . 562
2. 21 8
N2 5
1 . 562
2 . 344
J2 6
1 . 62 5
2 . 2 66
L2 6
1 . 62 5
2 . 2 81
N2 6
1 . 62 5
2 . 407
J2 7
1 . 688
2 . 32 9
L2 7
1 . 688
2 . 344
N2 7
1 . 688
2 . 470
J2 8
1 . 750
2 . 391
L2 8
1 . 750
2 . 406
N2 8
1 . 750
2 . 532
J2 9
1 . 81 2
2 . 453
L2 9
1 . 81 2
2 . 468
N2 9
1 . 81 2
2 . 594
J30
1 . 875
2 . 51 6
L30
1 . 875
2 . 531
N30
1 . 875
2 . 657
J31
1 . 938
2 . 579
L31
1 . 938
2 . 594
N31
1 . 938
2 . 72 0
© BSI 02 - 2 000
5
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
3
Part
No .
7
/8 –2 4 UNJ F
±
L
0.01 0
in
±
E
Part
0.01 5
No .
in
L
and o ve rall le ngth
1
/1 6 –2 0 UNJ F
±
L
0.01 0
in
E
±
E
0.01 5
Part
No .
in
/2 –2 0 UNJ F
±
L
0.01 0
in
±
E
0.01 5
in
J32
2 . 000
2 . 641
L32
2 . 000
2 . 656
N32
2 . 000
2 . 782
J34
2. 125
2 . 766
L34
2. 1 25
2 . 781
N34
2. 1 25
2 . 907
J36
2 . 2 50
2 . 891
L36
2 . 2 50
2 . 906
N36
2 . 2 50
3. 032
J38
2 . 375
3. 01 6
L38
2 . 375
3. 031
N38
2 . 375
3. 1 57
J40
2 . 500
3. 1 41
L40
2 . 500
3. 1 56
N40
2 . 500
3. 2 82
J42
2 . 62 5
3. 2 66
L42
2 . 62 5
3. 2 81
N42
2 . 62 5
3. 407
J44
2 . 750
3. 391
L44
2 . 750
3. 406
N44
2 . 750
3. 532
J46
2 . 875
3. 51 6
L46
2 . 875
3. 531
N46
2 . 875
3. 657
J48
3. 000
3. 641
L48
3. 000
3. 656
N48
3. 000
3. 782
J50
3. 1 2 5
3. 766
L50
3. 1 2 5
3. 781
N50
3. 1 2 5
3. 907
J52
3. 2 50
3. 891
L52
3. 2 50
3. 906
N52
3. 2 50
4. 032
J54
3. 375
4. 01 6
L54
3. 375
4. 031
N54
3. 375
4. 1 57
J56
3. 500
4. 1 41
L56
3. 500
4. 1 56
N56
3. 500
4. 2 82
J58
3. 62 5
4. 2 66
L58
3. 62 5
4. 2 81
N58
3. 62 5
4. 407
J60
3. 750
4. 391
L60
3. 750
4. 406
N60
3. 750
4. 532
J62
3. 875
4. 51 6
L62
3. 875
4. 531
N62
3. 875
4. 657
J64
4. 000
4. 641
L64
4. 000
4. 656
N64
4. 000
4. 782
J66
4. 1 2 5
4. 766
L66
4. 1 2 5
4. 781
N66
4. 1 2 5
4. 907
J68
4. 2 50
4. 891
L68
4. 2 50
4. 906
N68
4. 2 50
5. 032
J70
4. 375
5. 01 6
L70
4. 375
5. 031
N70
4. 375
5. 1 57
J72
4. 500
5. 1 41
L72
4. 500
5. 1 56
N72
4. 500
5. 2 82
J74
4. 62 5
5. 2 66
L74
4. 62 5
5. 2 81
N74
4. 62 5
5. 407
J76
4. 750
5. 391
L76
4. 750
5. 406
N76
4. 750
5. 532
J78
4. 875
5. 51 6
L78
4. 875
5. 531
N78
4. 875
5. 657
J80
5. 000
5. 641
L80
5. 000
5. 656
N80
5. 000
5. 782
J82
5. 1 2 5
5. 766
L82
5. 1 2 5
5. 781
N82
5. 1 2 5
5. 907
J84
5. 2 50
5. 891
L84
5. 2 50
5. 906
N84
5. 2 50
6. 032
J86
5. 375
6. 01 6
L86
5. 375
6. 031
N86
5. 375
6. 1 57
J88
5. 500
6. 1 41
L88
5. 500
6. 1 56
N88
5. 500
6. 2 82
J90
5. 62 5
6. 2 66
L90
5. 62 5
6. 2 81
N90
5. 62 5
6. 407
J92
5. 750
6. 391
L92
5. 750
6. 406
N92
5. 750
6. 532
J94
5. 875
6. 51 6
L94
5. 875
6. 531
N94
5. 875
6. 657
J96
6. 000
6. 641
L96
6. 000
6. 656
N96
6. 000
6. 782
6
© BSI 02 - 2 000
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
9
P art
No .
±
L
0.01 0
±
L
and o ve rall le ngth
5
/1 6 –1 8 UNJ F
E
0.01 5
in
in
P
5
0. 31 2
1 . 1 96
P
6
0. 375
P
7
0. 43 8
P
8
P
Part
No .
±
L
0.01 0
in
±
E
Part
0.01 5
No .
in
±
L
0.01 0
in
±
E
/8 –1 8 UNJ F
E
0.01 5
Part
No .
±
L
0.01 0
in
in
±
E
0.01 5
in
Q74
4. 62 5
5. 5 71
1 . 321
Q76
4. 75 0
5. 696
1 . 3 81
Q78
4. 875
5. 82 1
0. 500
1 . 446
Q80
5. 000
5. 946
9
0. 562
1 . 5 08
Q82
5. 1 2 5
6. 071
6. 31 4
Q1 0
0. 62 5
1 . 5 71
Q84
5. 2 5 0
6. 1 96
5. 375
6. 2 5 9
Q1 1
0. 688
1 . 634
Q86
5. 375
6. 3 2 1
5. 500
6. 384
Q1 2
0. 75 0
1 . 696
Q88
5. 500
6. 446
P90
5. 62 5
6. 509
Q1 3
0. 81 2
1 . 758
Q90
5. 62 5
6. 5 71
P92
5. 750
6. 63 4
Q1 4
0. 875
1 . 82 1
Q92
5. 75 0
6. 696
1 . 82 2
P94
5. 875
6. 75 9
Q1 5
0. 93 8
1 . 884
Q94
5. 875
6. 82 1
1 . 000
1 . 884
P96
6. 000
6. 884
Q1 6
1 . 000
1 . 946
Q96
6. 000
6. 946
1 . 062
1 . 946
Q1 7
1 . 062
2 . 008
P1 8
1 . 125
2 . 009
Q1 8
1.125
2 . 071
P1 9
1 . 1 88
2 . 072
Q1 9
1 . 1 88
2 . 1 34
P2 0
1 . 250
2. 1 34
Q2 0
1 . 250
2 . 1 96
P2 1
1 . 31 2
2 . 1 96
Q2 1
1 . 31 2
2 . 2 58
P2 2
1 . 375
2. 259
Q2 2
1 . 375
2. 321
P2 3
1 . 43 8
2 . 32 2
Q2 3
1 . 43 8
2 . 3 84
P2 4
1 . 500
2 . 384
Q2 4
1 . 500
2 . 446
P2 5
1 . 562
2 . 446
Q2 5
1 . 562
2 . 5 08
P2 6
1 . 62 5
2 . 509
Q2 6
1 . 62 5
2 . 5 71
P2 7
1 . 688
2 . 572
Q2 7
1 . 688
2 . 634
P2 8
1 . 75 0
2 . 63 4
Q2 8
1 . 75 0
2 . 696
P2 9
1 . 81 2
2 . 696
Q2 9
1 . 81 2
2 . 758
P3 0
1 . 875
2 . 75 9
Q3 0
1 . 875
2 . 82 1
P3 1
1 . 93 8
2 . 82 2
Q3 1
1 . 93 8
2 . 884
P3 2
2 . 000
2 . 884
Q3 2
2 . 000
2 . 946
P3 4
2. 125
3 . 009
Q3 4
2. 1 25
3. 071
P3 6
2. 250
3. 1 34
Q3 6
2. 250
3. 1 96
P3 8
2 . 375
3. 259
Q3 8
2 . 375
3. 3 2 1
P40
2 . 500
3 . 384
Q40
2 . 500
3. 446
P42
2 . 62 5
3 . 509
Q42
2 . 62 5
3. 5 71
P44
2 . 75 0
3 . 63 4
Q44
2 . 75 0
3. 696
P46
2 . 875
3 . 75 9
Q46
2 . 875
3. 82 1
P48
3 . 000
3 . 884
Q48
3. 000
3. 940
P5 0
3. 1 25
4. 009
Q5 0
3. 1 2 5
4. 071
P5 2
3. 250
4. 31 4
Q5 2
3. 2 5 0
4. 1 96
P5 4
3 . 375
4. 2 5 9
Q5 4
3. 375
4. 3 2 1
P5 6
3 . 500
4. 384
Q5 6
3. 500
4. 446
P5 8
3 . 62 5
4. 509
Q5 8
3. 62 5
4. 5 71
P60
3 . 75 0
4. 63 4
Q60
3. 75 0
4. 696
P62
3 . 875
4. 75 9
Q62
3. 875
4. 82 1
P64
4. 000
4. 884
Q64
4. 000
4. 946
P66
4. 1 2 5
5 . 009
Q66
4. 1 2 5
5. 071
P68
4. 2 5 0
5 . 31 4
Q68
4. 2 5 0
5. 1 96
P70
4. 375
5. 259
Q70
4. 375
5. 3 2 1
P72
4. 500
5 . 384
Q72
4. 500
5. 446
P74
4. 62 5
5. 509
Q
5
0. 31 2
1 . 2 58
1 . 259
P76
4. 750
5. 63 5
Q
6
0. 375
1 . 32 2
P78
4. 875
5. 75 9
Q
7
0. 43 8
0. 500
1 . 382
P80
5. 000
5. 884
Q
8
9
0. 562
1 . 446
P82
5. 1 2 5
6. 009
Q
P1 0
0. 62 5
1 . 51 9
P84
5. 2 50
P1 1
0. 688
1 . 572
P86
P1 2
0. 75 0
1 . 63 4
P88
P1 3
0. 81 2
1 . 642
P1 4
0. 875
1 . 72 9
P1 5
0. 93 8
P1 6
P1 7
© BSI 02 - 2 000
7
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
#
P art
No .
±
L
0.01 0
±
L
and o ve rall le ngth
+
–1 6 UNJ F
E
0.01 5
P art
No .
±
L
0.01 0
±
E
Part
0.01 5
No .
±
L
0.01 0
±
E
–1 4 UNJ F
E
0.01 5
Part
No .
±
L
0.01 0
±
E
0.01 5
in
in
U74
4. 62 5
5 . 845
4. 5 95
U76
4. 75 0
5 . 970
1 . 658
U78
4. 875
6. 005
0. 5 00
1 . 72 0
U80
5 . 000
6. 2 2 0
9
0. 5 62
1 . 782
U82
5. 1 25
6. 3 45
6. 3 32
U1 0
0. 62 5
1 . 845
U84
5. 250
6. 470
5 . 375
6. 457
U1 1
0. 688
1 . 908
U86
5 . 3 75
6. 5 95
5 . 500
6. 5 82
U1 2
0. 750
1 . 970
U88
6. 5 00
6. 72 0
S90
5 . 62 5
6. 707
U1 3
0. 81 2
2 . 032
U90
5 . 62 5
6. 845
S92
5 . 75 0
6. 832
U1 4
0. 875
2 . 095
U92
5 . 75 0
6. 970
2 . 02 0
S94
5 . 875
6. 957
U1 5
0. 938
2 . 2 03
U94
5 . 875
7. 095
1 . 000
2 . 082
S96
6. 000
7. 082
U1 6
1 . 000
2. 220
U96
6. 000
7. 2 2 0
1 . 062
2 . 1 44
U1 7
1 . 062
2 . 2 82
S1 8
1 . 125
2 . 2 07
U1 8
1 . 1 25
2 . 3 45
S1 9
1 . 1 88
2 . 2 70
U1 9
1 . 1 88
2 . 408
S2 0
1 . 250
2 . 332
U2 0
1 . 2 50
2 . 470
S2 1
1 . 31 2
2 . 394
U2 1
1 . 31 2
2 . 5 32
S2 2
1 . 375
2 . 457
U2 2
1 . 3 75
2 . 5 95
S2 3
1 . 43 8
2 . 52 0
U2 3
1 . 438
2 . 658
S2 4
1 . 500
2 . 582
U2 4
1 . 5 00
2 . 72 0
S2 5
1 . 562
2 . 644
U2 5
1 . 5 62
2 . 782
S2 6
1 . 62 5
2 . 707
U2 6
1 . 62 5
2 . 845
S2 7
1 . 688
2 . 770
U2 7
1 . 688
2 . 908
S2 8
1 . 75 0
2 . 832
U2 8
1 . 750
2 . 970
S2 9
1 . 81 2
2 . 894
U2 9
1 . 81 2
3. 032
S3 0
1 . 875
2 . 957
U3 0
1 . 875
3. 095
S3 1
1 . 93 8
3 . 02 0
U3 1
1 . 938
3. 1 58
S3 2
2 . 000
3 . 082
U3 2
2 . 000
3. 2 2 0
S3 4
2. 125
3 . 2 07
U3 4
2. 1 25
3. 3 45
S3 6
2. 250
3 . 332
U3 6
2 . 2 50
3. 470
S3 8
2 . 375
3 . 457
U3 8
2 . 3 75
3. 5 95
S40
2 . 500
3 . 582
U40
2 . 5 00
3. 72 0
S42
2 . 62 5
3 . 707
U42
2 . 62 5
3. 845
S44
2 . 75 0
3 . 832
U44
2 . 750
3. 970
S46
2 . 875
3 . 957
U46
2 . 875
4. 095
S48
3 . 000
4. 082
U48
3. 000
4. 2 2 0
S5 0
3. 1 25
4. 2 07
U5 0
3. 1 2 5
4. 3 45
S5 2
3. 250
4. 332
U5 2
3. 2 50
4. 470
S5 4
3 . 375
4. 457
U5 4
3. 3 75
4. 5 95
S5 6
3 . 500
4. 582
U5 6
3. 5 00
4. 72 0
S5 8
3 . 62 5
4. 707
U5 8
3. 62 5
4. 845
S60
3 . 75 0
4. 832
U60
3. 750
4. 970
S62
3 . 875
4. 957
U62
3. 875
5. 095
S64
4. 000
5 . 082
U64
4. 000
5. 2 2 0
S66
4. 1 2 5
5 . 2 07
U66
4. 1 2 5
5. 3 45
S68
4. 2 5 0
5 . 332
U68
4. 2 50
5. 470
S70
4. 375
5 . 457
U70
4. 3 75
5. 5 95
S72
4. 500
5 . 582
U72
4. 5 00
5. 72 0
in
in
in
in
S74
4. 62 5
5. 707
U
5
0. 3 1 2
1 . 5 32
1 . 457
S76
4. 75 0
5. 832
U
6
0. 3 75
1 . 52 0
S78
4. 875
5. 957
U
7
0. 438
0. 500
1 . 582
S80
5 . 000
6. 082
U
8
9
0. 562
1 . 644
S82
5. 1 25
6. 2 07
U
S1 0
0. 62 5
1 . 707
S84
5. 250
S1 1
0. 688
1 . 770
S86
S1 2
0. 75 0
1 . 832
S88
S1 3
0. 81 2
1 . 894
S1 4
0. 875
1 . 957
S1 5
0. 93 8
S1 6
S1 7
in
in
S
5
0. 31 2
1 . 394
S
6
0. 375
S
7
0. 43 8
S
8
S
8
© BSI 02 - 2 000
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
L
and o ve rall le ngth
1 –1 2 UNJF
Part
No .
±
L
0.01 0
±
E
0.01 5
Part
No .
(
E
1
±
L
0.01 0
±
E
Part
0.01 5
No .
±
L
0.01 0
in
±
E
–1 2 UNJ F
0.01 5
Part
No .
±
L
0.01 0
in
in
±
E
0.01 5
in
in
in
W
5
0. 3 1 2
1 . 651
W74
4. 62 5
5. 964
Y
5
0. 3 1 2
1 . 800
Y74
4. 62 5
6. 1 1 3
W
6
0. 3 75
1 . 71 4
W76
4. 75 0
6. 089
Y
6
0. 3 75
1 . 863
Y76
4. 750
6. 2 3 8
W
7
0. 438
1 . 777
W78
4. 875
6. 2 1 4
Y
7
0. 438
1 . 92 6
Y78
4. 875
6. 3 63
W
8
0. 5 00
1 . 839
W80
5. 000
6. 3 39
Y
8
0. 5 00
1 . 988
Y80
5. 000
6. 488
W
9
0. 5 62
1 . 901
W82
5. 1 2 5
6. 464
Y
9
0. 5 62
2 . 050
Y82
5. 1 2 5
6. 61 3
W1 0
0. 62 5
1 . 964
W84
5. 2 5 0
6. 5 89
Y1 0
0. 62 5
2.1 13
Y84
5. 2 50
6. 73 8
W1 1
0. 688
2 . 027
W86
5. 375
6. 71 4
Y1 1
0. 688
2 . 1 76
Y86
5. 3 75
6. 863
W1 2
0. 750
2 . 089
W88
5. 500
6. 839
Y1 2
0. 750
2 . 2 38
Y88
5. 5 00
6. 988
W1 3
0. 81 2
2 . 1 51
W90
5. 62 5
6. 964
Y1 3
0. 81 2
2 . 3 00
Y90
5. 62 5
7. 1 1 3
W1 4
0. 875
2. 214
W92
5. 75 0
7. 089
Y1 4
0. 875
2 . 3 63
Y92
5. 750
7. 2 3 8
W1 5
0. 938
2 . 2 77
W94
5. 875
7. 2 1 4
Y1 5
0. 938
2 . 42 6
Y94
5. 875
7. 3 63
W1 6
1 . 000
2 . 3 39
W96
6. 000
7. 3 39
Y1 6
1 . 000
2 . 488
Y96
6. 000
7. 488
W1 7
1 . 062
2 . 401
Y1 7
1 . 062
2 . 5 50
W1 8
1 . 1 25
2 . 464
Y1 8
1 . 1 25
2 . 61 3
W1 9
1 . 1 88
2 . 5 27
Y1 9
1 . 1 88
2 . 676
W2 0
1 . 2 50
2 . 5 89
Y2 0
1 . 2 50
2 . 738
W2 1
1 . 31 2
2 . 651
Y2 1
1 . 31 2
2 . 800
W2 2
1 . 3 75
2 . 71 4
Y2 2
1 . 3 75
2 . 863
W2 3
1 . 438
2 . 777
Y2 3
1 . 438
2 . 92 6
W2 4
1 . 5 00
2 . 839
Y2 4
1 . 5 00
2 . 988
W2 5
1 . 5 62
2 . 901
Y2 5
1 . 5 62
3 . 050
W2 6
1 . 62 5
2 . 964
Y2 6
1 . 62 5
3. 1 1 3
W2 7
1 . 688
3. 027
Y2 7
1 . 688
3 . 1 76
W2 8
1 . 750
3. 089
Y2 8
1 . 750
3 . 2 38
W2 9
1 . 81 2
3. 1 51
Y2 9
1 . 81 2
3 . 3 00
W3 0
1 . 875
3. 2 1 4
Y3 0
1 . 875
3 . 3 63
W3 1
1 . 938
3. 2 77
Y3 1
1 . 938
3 . 42 6
W3 2
2 . 000
3. 3 39
Y3 2
2 . 000
3 . 488
W3 4
2. 1 25
3. 464
Y3 4
2. 1 25
3 . 61 3
W3 6
2 . 2 50
3. 5 89
Y3 6
2 . 2 50
3 . 738
W3 8
2 . 3 75
3. 71 4
Y3 8
2 . 3 75
3 . 863
W40
2 . 5 00
3. 839
Y40
2 . 5 00
3 . 988
W42
2 . 62 5
3. 964
Y42
2 . 62 5
4. 1 1 3
W44
2 . 750
4. 089
Y44
2 . 750
4. 2 38
W46
2 . 875
4. 2 1 4
Y46
2 . 875
4. 3 63
W48
3. 000
4. 3 39
Y48
3. 000
4. 488
W5 0
3. 1 2 5
4. 464
Y5 0
3. 1 2 5
4. 61 3
W5 2
3. 2 50
4. 5 89
Y5 2
3. 2 50
4. 738
W5 4
3. 3 75
4. 71 4
Y5 4
3. 3 75
4. 863
W5 6
3. 5 00
4. 839
Y5 6
3. 5 00
4. 988
W5 8
3. 62 5
4. 964
Y5 8
3. 62 5
5. 1 1 3
W60
3. 750
5. 089
Y60
3. 750
5 . 2 38
W62
3. 875
5. 2 1 4
Y62
3. 875
5 . 3 63
W64
4. 000
5. 3 39
Y64
4. 000
5 . 488
W66
4. 1 2 5
5. 464
Y66
4. 1 2 5
5 . 61 3
W68
4. 2 50
5. 5 89
Y68
4. 2 50
5 . 738
W70
4. 3 75
5. 71 4
Y70
4. 3 75
5 . 863
W72
4. 5 00
5. 839
Y72
4. 5 00
5 . 988
in
© BSI 02 - 2 000
in
9
BS 2 A 2 2 9: 1 97 2
Tab le 2 — Be aring le ngth
!
E
1
Part
No .
±
L
0.01 0
in
±
L
and ove rall le ngth
E
–1 2 UNJ F
Part
0.01 5
No .
±
L
0.01 0
in
in
±
E
0.01 5
in
Z
5
0. 3 1 2
1 . 988
Z74
4. 62 5
6. 301
Z
6
0. 3 75
2 . 05 1
Z76
4. 750
6. 42 6
Z
7
0. 438
2.1 1 4
Z78
4. 875
6. 551
Z
8
0. 5 00
2 . 1 76
Z80
5. 000
6. 676
Z
9
0. 5 62
2. 238
Z82
5. 1 2 5
6. 801
Z1 0
0. 62 5
2 . 3 01
Z84
5. 2 50
6. 92 6
Z1 1
0. 688
2 . 3 64
Z86
5. 3 75
7. 051
Z1 2
0. 750
2 . 42 6
Z88
5. 5 00
7. 1 76
Z1 3
0. 81 2
2 . 488
Z90
5. 62 5
7. 301
Z1 4
0. 875
2. 551
Z92
5. 750
7. 42 6
Z1 5
0. 938
2 . 61 4
Z94
5. 875
7. 551
Z1 6
1 . 000
2 . 676
Z96
6. 000
7. 676
Z1 7
1 . 062
2 . 73 8
Z1 8
1 . 1 25
2 . 801
Z1 9
1 . 1 88
2 . 864
Z2 0
1 . 2 50
2 . 92 6
Z2 1
1 . 31 2
2 . 988
Z2 2
1 . 3 75
3 . 05 1
Z2 3
1 . 438
3. 1 1 4
Z2 4
1 . 5 00
3 . 1 76
Z2 5
1 . 5 62
3. 238
Z2 6
1 . 62 5
3 . 3 01
Z2 7
1 . 688
3 . 3 64
Z2 8
1 . 750
3 . 42 6
Z2 9
1 . 81 2
3 . 488
Z3 0
1 . 875
3. 551
Z3 1
1 . 938
3 . 61 4
Z3 2
2 . 000
3 . 676
Z3 4
2. 1 25
3 . 801
Z3 6
2 . 2 90
3 . 92 6
Z3 8
2 . 3 75
4. 05 4
Z40
2 . 5 90
4. 1 76
Z42
2 . 62 5
4. 3 01
Z44
2 . 790
4. 42 6
Z46
2 . 875
4. 5 5 1
Z48
3. 000
4. 676
Z5 0
3. 1 2 5
4. 801
Z5 2
3. 2 50
4. 92 6
Z5 4
3. 3 75
5 . 05 1
Z5 6
3. 5 90
5 . 1 76
Z5 8
3. 62 5
5 . 3 01
Z60
3. 750
5 . 42 6
Z62
3. 875
5. 551
Z64
4. 000
5 . 676
Z66
4. 1 2 5
5 . 801
Z68
4. 2 50
5 . 92 6
Z70
4. 3 75
6. 05 1
Z72
4. 5 00
6. 1 76
10
© BSI 02 - 2 000
BS 2A 229:1 972
Appendix A Oversize bolts
Nominal
Size
UNJF
Decimal
equivalent
A (Plain shank dia.)
First oversize (X)
Second oversize (Y)
Maximum
Minimum
Maximum
Minimum
Maximum
Minimum
1 0–32
0. 1 900
0. 1 895
0. 1 885
0. 2026
0. 201 6
0. 21 82
0. 21 72
1
/4
0. 2500
0. 2495
0. 2485
0. 2651
0. 2641
0. 2808
0. 2798
5
/1 6
0. 31 25
0. 31 20
0. 31 1 0
0. 3276
0. 3266
0. 3433
0. 3423
3
/8
0. 3750
0. 3745
0. 3735
0. 3901
0. 3891
0. 4058
0. 4048
7
/1 6
0. 4375
0. 4370
0. 4360
0. 4526
0. 451 6
0. 4683
0. 4673
1
/2
0. 5000
0. 4995
0. 4985
0. 51 51
0. 51 41
0. 5308
0. 5298
9
/1 6
0. 5625
0. 561 5
0. 5605
0. 5771
0. 5761
0. 5928
0. 591 8
5
/8
0. 6250
0. 6240
0. 6230
0. 6396
0. 6386
0. 6553
0. 6543
3
/4
0. 7500
0. 7490
0. 7480
0. 7646
0. 7636
0. 7803
0. 7793
7
/8
0. 8750
0. 8740
0. 8730
0. 8896
0. 8886
0. 9053
0. 9043
1.0
1 . 0000
0. 9990
0. 9980
1 . 01 46
1 . 01 36
1 . 0303
1 . 0293
1
1 . 1 250
1 . 1 240
1 . 1 225
1 . 1 396
1 . 1 381
1 . 1 553
1 . 1 538
1
1 . 2500
1 . 2471
1 . 2475
1 . 2646
1 . 2631
1 . 2803
1 . 2788
1 /8 –1 2
1 /4 –1 2
Examples of part numbers for identification of bolts:
Appendix B Table for the conversion of inches to millimetre equivalents
in
mm
1
25. 4
2
50. 8
3
76. 2
4
1 01 . 6
5
1 27. 0
6
1 52. 4
7
1 77. 8
8
203. 2
9
228. 6
10
254. 0
© BSI 02- 2000
BS 2A
229:1972
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