Bsi bs 4a 114 1999 + a2 2015

Licensed Copy: Miss Lucie Carter, British Standards Institution, 07/08/2012 17:36, Uncontrolled Copy, (c) The British Standards Institution 2012

 "! !"



!

!

!

!nD:XMX:)…Xd`
Md{
6SHFLÀFDWLRQIRU
:d{{d}Xd`W{D}X}…X`P
}…DD[>
FRUURVLRQUHVLVWLQJVWHHO
^Š}V{dd^WVD)ADA>
PXVKURRPKHDGHG
}[d……DAWA{XD> 2d[…} p}…{D`P…V
VORWWHGGULYHEROWV
)
:[)}} II•‚e•I•q

VWUHQJWKFODVV03D

ICS
! 49.030.20
Oas•†•sˆ•

 ' %"#" ! 
!!
&
"
! 

""
 ' ' " 
%

4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4

4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4

4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4

4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4

4
4
4
4
4
4
4
4
4
4
4
4

!
BSO

4AeeO=eaaa
114:1999
`:d{nd{)…X`P
+A2:2015
+A1:2012
d{{XPD`AŠ^ No. 1
Incorporating
corrigenda Nos. 1 and 2


!
BS O

4A eeO=eaaa
114:1999+A2:2015
114:1999+A1:2012

he British Standards Institution 2012

d^^X……DD} {D}nd`}X2[D Md{ …VX}
{X…X}V !…)`A){A
"VD n{Dn){)…Xd` dM …VX} {X…X}V !…)`A){A )} D`…{Š}…DA …d "D:V`X:)[ d^^X……DD


‚eˆ>
D{d}n):D M)}…D`D{} )`A M)}…D`X`P }’}…D^}> Šnd` VX:V …VD Md[[dX`P
2dAXD} D{D {Dn{D}D`…DA=
XX[
X)…Xd`
Š…Vd{X…’ p
X{d{…VX`D}} XX}Xd`q
d`MDAD{)…Xd` dM {X…X}V d{PD{}
X`X}…{’ dM DMD`:D
!d:XD…’ dM {X…X}V
D{d}n):D d^n)`XD} X^X…DA
dWdn…DA ^D^2D{

This British Standard,
having been approved by the
Engineering Sector Committee,
was published under authority
of the Standards Committee
and comes into effect
on 15 July 1999
© The British Standards
Institution 2016
Published by BSI Standards
Limited 2016
The following BSI references
relate to the work on this
standard:
Committee reference ACE/12

Drafts for comment
98/706175 DC,
12/30262058 DC,
15/30317035 DC
ISBN 978 0 580 92822 2

Amendments/corrigenda issued since publication
Amd. No.

Date

Comments

C1

March 2010

A1

September 2012

See Foreword

A2

September 2015

See Foreword

C2

February 2016

Clause 2 and 4.2 b) updated. Table 1
– max. and min. columns reordered.
Table 2 – upper tolerance of E updated.


! O
eeO = eaaa
BS 4A 114:1999+A2:2015
114:1999+A1:2012

Licensed Copy: Miss Lucie Carter, British Standards Institution, 07/08/2012 17:36, Uncontrolled Copy, (c) The British Standards Institution 2012

d`…D`…}
)PD
d^^X……DD} {D}nd`}X2[D
`}XAD M{d`… :dD{
d{Dd{A
XX
e !:dnD
e
ˆ d{^)…XD {DMD{D`:D}
e
† D`D{)[ {DvŠX{D^D`…}
e
O )…D{X)[} )`A ^)`ŠM):…Š{D
e
N X^D`}Xd`} )`A …d[D{)`:D}
e

 !:{DW…V{D)A}
e
finish
€ Protective

`…XW:d{{d}Xd`
…{D)…^D`…
e
I ){A`D}} )[ŠD}
e
2
a AD`…XM’X`P )`A ^){ZX`P
e
2
e• Š)[X…’ )}}Š{)`:D n{d:DAŠ{D
e
XPŠ{D e  X^D`}Xd`} dM 2d[…}
ˆ
XPŠ{D ˆ  D){X`P [D`P…V > :[)^nX`P [D`P…V  )`A dD{)[[ [D`P…V

ˆ
")2[D e  X^D`}Xd`} dM 2d[…}
†
")2[D ˆ  D){X`P [D`P…V > :[)^nX`P [D`P…V  )`A dD{)[[ [D`P…V

O
for manufacture
of bolts
")2[D †  Materials
^)…D{X)[} Md{
^)`ŠM):…Š{D dM

2d[…}
€

© The British Standards Institution 2016
2012
2015
N ! 2010

i
X


BS 4A 114:1999+A2:2015

Foreword
Publishing information
This British Standard is published by BSI Standards Limited, under licence
from The British Standards Institution, and came into effect on 15 July 1999.
It was prepared by Technical Committee ACE/12, Aerospace fasteners and
fastening systems. A list of organizations represented on this committee can
be obtained on request to its secretary.
Supersession
BS 4A 114:1999+A2:2015 supersedes BS 4A 114:1999+A1:2012, which is
withdrawn.
Information about this document
Text introduced or altered by Amendments No. 1 (and No. 2, respectively) are
indicated in the text by tags
 (and ). Minor editorial changes are
not tagged.
Contractual and legal considerations
This publication does not purport to include all the necessary provisions of a

contract. Users are responsible for its correct application.

Licensed

Compliance with a British Standard cannot confer immunity from
legal obligations.

!Š^^){’ dM n)PD}
"VX} Ad:Š^D`… :d^n{X}D} ) M{d`… :dD{> )` X`}XAD M{d`… :dD{> n)PD} X )`A XX>
n)PD} e …d € )`A ) 2):Z :dD{s

ii

© The British Standards Institution 2016
2015


e British Sta

ion 2

BS 4A 114:1999+A2:2015

e !:dnD
This British Standard specifies materials
and manufacture, dimensions, protective
treatment and quality assurance requirements
for corrosion-resisting and heat resisting
steel, mushroom-headed, slotted-drive, bolts

(minimum tensile strength 880 MPa).

"
"VD [)…D}… DAX…Xd` dM )`
D{d}n):D !D{XD} }…)`A){A X}
X`AX:)…DA 2’ ) n{DMX‘ `Š^2D{s

ˆ d{^)…XD {DMD{D`:D}
The following documents, in whole or in part,
are normatively referenced in this document
and are indispensable for its application. For
dated references, only the edition cited applies.
For undated references, the latest edition
of the referenced document (including any
amendments) applies.
BS 4A 100:2003, Specification for general
requirements for bolts and free running nuts of
tensile strength not exceeding 1249 MPa.
BS S 80, Specification for high chromium-nickel
corrosion-resisting steel forging stock, bars,
forgings and parts (880-1080 MPa, limiting
ruling section 100 mm).
BS S 143, Specification for chromium-nickelcopper-molybdenum corrosion-resisting steel
(precipitation hardening) billets, bars, forgings
and parts (930-1080 MPa).

Text deleted.

BS EN 2398, Aerospace series – Heat resisting
steel FE-PA2601 (X6NiCrTiMoV26-15) – Rm •
=
”
900 MPa – Bars for machined bolts – D =
25 mm.
BS EN 2399, Aerospace series – Heat resisting

VWHHO)(3$;1L&U7L0R9
²5P•
03D²%DUVIRUIRUJHGEROWV²'”PP.
BS EN ISO 6506-1, Metallic materials – Brinell
hardness test – Part 1: Test method.
BS EN ISO 6507-1, Metallic materials – Vickers
hardness test – Part 1: Test method.

ed Copy: Miss Lucie Carter, Britis

BS HR 650, Specification for High expansion
heat-resisting steel bar and wire for the
manufacture of bolts, studs, set screws and
nuts – (Ni 25.5, Cr 15, Ti 2, Mn 1.5, Mo 1.25,
Si 0.7, V 0.3) (Limiting ruling section 20 mm).

† D`D{)[ {DvŠX{D^D`…}

Osˆ "VD ^)…D{X)[ Š}DA Md{ …VD ^)`ŠM):…Š{D dM Md{PDA
2d[…} }V)[[ V)D …VD Md[[dX`P ^D:V)`X:)[ n{dnD{…XD}
X` …VD MX`)[[’ VD)… …{D)…DA :d`AX…Xd`=
a) 0.2 % proof stress (min.) : 590 MPa;
b) tensile strength (min.) : 880 MPa
Text deleted;
c) elongation (min.) : 12 %;
d) Izod impact (min.) : 55J (40 ft. lbf ).

NOTE This is not applicable to the materials given in
BS EN 2398 and BS EN 2399.

N X^D`}Xd`} )`A …d[D{)`:D}

Nse
[[ MX`X}VDA 2d[…}> }V)[[ :d`Md{^ …d …VD
AX^D`}Xd`} )`A …d[D{)`:D} PXD` X` ")2[D} e )`A ˆs
Nsˆ "VD :[)^nX`P [D`P…V dM …VD 2d[… }V)[[ :d`Md{^ …d
…VD AX^D`}Xd`} )`A …d[D{)`:D} PXD` X` ")2[D ˆ> )`A
}V)[[ 2D }Š:V …V)…> VD` ) }…)`A){A `Š… X…VdŠ…
countersink V)}
:dŠ`…D{}X`Z d{ {X`P P)ŠPD X…VdŠ… :dŠ`…D{}Š`Z
2DD` }:{DDA d` )} M){ )} nd}}X2[D 2’ V)`A> X…}
[D)AX`P M):D X} X…VX` AX}…)`:D  M{d^ …VD Š`AD{}XAD
dM …VD 2d[… VD)As "VD {Š` dŠ… dM …VD …V{D)A }V)[[ `d…
D‘:DDA …X:D …VD nX…:Vs
Ns† "VD `d^X`)[ [D`P…V dM …VD 2d[… }V)[[ 2D …VD
^X`X^Š^ 2D){X`P [D`P…V ^X`> VX:V }V)[[ 2D …VD
^X`X^Š^ :[)^nX`P [D`P…V> ^X`> [D}} …d …V{D)A
nX…:VD}s
"
"VD
L
vŠd…DA
X`in")2[D
ˆ ){D
X`in
•se•
X`:V
NOTE
The2D){X`P
bearing[D`P…V
lengths
quoted
Table

2 are
0.10
inch
X`:{D^D`…} 2Š… VD{D ) •s•N [D`P…V X`:{D^D`… X} {DvŠX{DA …VX} X}
nD{^X}}X2[D 2’ )P{DD^D`… 2D…DD` ^)`ŠM):…Š{D{ )`A Š}D{ )`A
}VdŠ[A 2D XAD`…XMXDA )} Md[[d} = I  X`AX:)…X`P ) W†ˆ # 2d[…
L, 
M )`A
and

E `DDA
need …d
to be
dM 2D){X`P [D`P…V •sIN X`:VD}. >
2D adjusted
)AYŠ}…DA
)::d{AX`P[’s

 !:{D …V{D)A}
"VD 2d[…} }V)[[ V)D #`XMXDA }:{D …V{D)A} dM …VD
Md{^ )`A MX… }nD:XMXDA X` …VD [)…D}… DAX…Xd` dM {X…X}V
!…)`A){A
e••s

3URWHFWLYHILQLVK
There shall be no protective finish applied.

+DUGQHVVYDOXHV

The hardness values of finished bolts shall be as
follows in accordance with the BS EN ISO 6506-1
and BS EN ISO 6507-1:

d[…} }V)[[ :d`Md{^ …d !
e•• .

a) for machined components: 255 min./321 max.
HB or 270 min./340 max. HV;

O )…D{X)[} )`A ^)`ŠM):…Š{D

b) for forged components: 248 min./341 max. HB
or 260 min./360 max. HV.

Ose "VD 2d[…} }V)[[ 2D ^)`ŠM):…Š{DA 2’ d`D dM …VD
Md[[dX`P ^D…VdA}=
)q ^):VX`DA M{d^ 2{XPV… A{)` 2){} VX:V
:d`Md{^ …d d`D dM …VD {X…X}V !…)`A){A} [X}…DA
X` ")2[D †
2q :d[A Md{PDA ^)…D{X)[ VX:V :d`Md{^} …d d`D dM
…VD {X…X}V !…)`A){A} [X}…DA X` ")2[D †s

© The British Standards Institution 2016
2015

1


BS 4A 114:1999+A2:2015
114:1999+A1:2012

,GHQWLI\LQJDQGPDUNLQJ

0DUNLQJ

,GHQWLILFDWLRQ

tish Standards Institution, 07/08/2012 17:36, Uncontrolled Copy, (c) The British Standards Institution 20

Bolts made from material conforming to BS EN 2398
or BS EN 2399 shall be identified with a code “X ”,
e.g. a 6-32 UNC bolt with an “L” dimension of
0.1 inches and made from one of the two materials
above shall be referenced as “A114X1B” or for
bolts made from material conforming to BS S 80 or
BS S 143, this shall be identified as “A114-1B”.

Bolts shall be marked in accordance with
BS 4A 100:2003, Clause . Bolts for all nominal
sizes made from material conforming to
BS EN 2398 or BS EN 2399 shall be marked with
an “X ”.

e• Š)[X…’ )}}Š{)`:D n{d:DAŠ{D
"VD 2d[…} }V)[[ :d`Md{^ …d …VD vŠ)[X…’ {DvŠX{D^D`…}
}nD:XMXDA X` !
e••> )} )nn{dn{X)…D …d …VD ^D…VdA
dM ^)`ŠM):…Š{Ds

>Ý°ÊÀ՘œÕÌʜv
̅Ài>` rÊĨÊÝÊ«ˆÌV…

I


ưvấiv
ịđ

ưLi>} i}èđ

, >`
{x O

I
ưV>ô} i}èđ





1 >`










I
ưi> i}èđ

XP{D e  X^D`}Xd`} dM 2d[…}
eq

d{ 2D){X`P [D`P…V > :[)^nX`P [D`P…V  )`A dD{)[[ [D`P…V
}DD ")2[D ˆs





XPŠ{D ˆ  D){X`P [D`P…V >
:[)^nX`P [D`P…V  )`A dD{)[[
[D`P…V 

2

© The British Standards Institution 2016
2012
2015


0.1895
•seIN

0.1635
•se•N

© The British Standards Institution 2016
X`

•s•I†

•s•€e

•s•†

•s•†

•s•†

•sOa€

•sONa

•s†€€

•s†ˆ€

•sˆ€€

X`

DMs d`[’

X`s [D`P…V
nX…:V
dM }:{DDA
7KUHDG
nd{…Xd` dM
UXQRXW

}V)`Z
(2 ×
SLWFK