BRITISH STANDARD BS 4A 112 1992 (superseding BS 3A 112 1985) Specification for Cadmium plated steel shear bolts (Unified hexagons and Unified threads) http //dx doi org/10 3403/00285948U http //dx doi[.]
Trang 1(super sed ing
B S3A1 2:19 5)
Trang 2This British Stan ard,ha ing
b en pre ared u der the
directionof the Aerosp ce
Stan ards Polcy Commite ,
waspublshed u der the
authority f the Stan ards
Bo rdan comes into efect on
1 Decemb r 1 9
© BSI 0 -1 9
The folowing BSI references
relate to the work on this
stan ard:
Commite reference ACE/12
Draft for information 9 / 80 7
The prep ration of this British Stand rd was entrusted b the Aerosp ce
Stand rds Polcy Commit e ( ACE/-) to Tech ical Commit e ACE/ 12, upon
which the folowing bodies were represented:
The Association of Electronic , Telecommu ications and Busines Equipment
Industries
British Industrial Fastener Federation
Ministry of Defence
Society of British Aerosp ce Comp nies Ltd
Am endm ents is ued sinc publ cation
Trang 3Pag e
5 Mechanical properties for forg ed bolts in the finaly
Ta le 2 — Bearing leng th L, clamping leng th Mand ov eral leng th E 3
Trang 4This edition of this British Stand rd has be n prep red u der the direction of the
Aerosp ce Stand rds Polcy Commit e and super edes BS3A1 2:19 5 which is
withdrawn
This edition clarifies the ma imum diameter of bolts after plating , but it do s not
reflect a ful rev iew or rev ision of the stand rd, which wi be u dertaken in due
cour e The0.0 0 in plating alowance on the ma imum diameter quoted
inBS3A1 2 ( and preceding editions) is now embodied in the ma imum diameter
after plating inTa le 1, and sep rate reference to a plating al owance has be n
deleted.The ma imum diameter of bolts before plating has be n deleted and the
thick es of plating is now controled
An equiv alent rang e of bolts with u plated shanks is specified in BS3A10 Nuts
suita le for use with either rang e of shear bolts are specified inBS2A1 0
A British Stand rd do s not purport to include al the neces ary prov isions of a
contract User of British Stand rds are responsible for their cor ect a pl cation
Com pl anc with a British Standard do s not of itselfc nfer im munity
f om leg al obl g ations
Summ ary of pag es
This document comprises a font cov er, an inside f ont cov er, p g es i andi,
p g es1to8, an inside b ck cov er and a b ck cov er
This stand rd has be n up ated ( se cop rig ht d te) and ma hav e ha
amendments incorporated.This wi be indicated in the amendment ta le on the
inside f ont cov er
Trang 51 Scope
This British Stand rd specifies materials,
dimensions, finish and inspection requirements for
ste l shear bolts with Unified hex g ons and Unified
threa s and with close tolerance shanks, ca mium
plated, to be suita le for insertion in aluminium
aloy materials for aerosp ce use
NOT The latest re ision of an Aerosp ce Series stan ard is
in icated b a prefix n mb r
2.1 Norm ative referenc s
This British Stand rd incorporates, b reference,
prov isions f om specific editions of other
publ cations These normativ e references are cited
at the a propriate points in the text and the
publ cations are lsted on the inside b ck cov er
Subsequent amendments to, or rev isions of, any of
these publcations a ply to this stand rd only when
incorporated in it b up ating or rev ision
2.2 Inform ative referenc s
This British Stand rd refer to other publ cations
that prov ide information or g uid nce Editions of
these publ cations cur ent at the time of is ue of this
stand rd are lsted on the inside b ck cov er, but
reference should be ma e to the latest editions
The bolts shal conform to the latest edition of
BSA10
4 Materials and m anufacture
The bolts shal be manufactured b one of the
folowing methods:
a) machined fom brig ht drawn b r which
conform to BSS15 :19 6;
NOT S9 material ma b used u ti stocks are
e hausted
b) forg ed f om material which conforms to one of
the folowing British Stand rds:
BS 2S 14 :19 6
BS 2S 14 :19 6
BS S 15 :19 7
5 Mechanical properties for forg ed
bolts in the final y heat- tr ated
condition
Forg ed bolts in the finaly heat-treated condition
shal hav e the fol owing mechanical properties:
a) 0.2 per cent pro f stres : not les
than6 0MPa:
b) tensie streng th: 8 0MPa to10 0MPa;
c) elong ation on5.6 ÆS
o ( area): not les
than1 %;
d) imp ct v alue: not les than5 J
6 Anti- corrosion tr atm ent
All finished bolts shal be coated with ca mium in
ac ord nce with DEFSTAN0 -19[ 1]
7 Dim ensions
7.1 All finished bolts, after the a pl cation of the
anti cor osion coating , shal be in ac ord nce with
the dimensions and tolerances g iv en inTa le 1
andTa le 2
7.2 The clamping leng th M of the bolts shal be in
ac ord nce with the dimensions and tolerances
inTa le 2 and shal be such that, when a stand rd
n t without cou ter in or a ring g aug e without
cou ter in has be n s rewed on as far as pos ible
b hand, its lea ing face is within the distance M
fom the u der ide of the bolt hea The ru out of
the threa shal not exce d twice the pitch
7.3 The nominal leng th of the bolt shal be the
minimum bearing leng th L, which is determined b
the minimum clamping leng th Mles two threa
pitches
8 Scr w thr ads
The bolts shal hav e Unified threa s of the form and
clas of fit specified in the latest edition of BSA10
Trang 6T
Trang 7Table 2 — Bearing leng th L, clam ping leng th M
and overal leng th E
Ta le 2 — Bearing leng th L , clam ping leng th M
and overal leng th E
Dimensions in inches
1/4 in UNF
Part No
a
L
m in
1E
2E
3E
4E
5E
0.1
0.2
0.3
0.4
0.5
0.201
0.3 1
0.4 1
0.5 1
0.6 1
0.5
0.6
0.7
0.8
0.9
6E
7E
8E
9E
10E
0.6
0.7
0.8
0.9
1.0
0.7 1
0.8 1
0.9 1
0.0 1
0.101
1.0
1.10
1.20
1.3
1.4
1 E
1 E
13E
14E
15E
1.1
1.2
1.3
1.4
1.5
1.201
1.3 1
1.4 1
1.5 1
1.6 1
1.5
1.6
1.7
1.8
1.9
16E
17E
18E
19E
20E
1.6
1.7
1.8
1.9
2.0
1.7 1
1.8 1
1.9 1
2.0 1
2.101
2.0
2.10
2.20
2.3
2.4
2 E
2 E
23E
24E
25E
2.1
2.2
2.3
2.4
2.5
2.201
2.3 1
2.4 1
2.5 1
2.6 1
2.5
2.6
2.7
2.8
2.9
+0
– 0
+0.0
–
Dimensions in inches
5/1 in UNF
Part No
a
L
m in
1G
2G
3G
4G
5G
0.1
0.2
0.3
0.4
0.5
0.2 3
0.313
0.413
0.513
0.613
0.51
0.61
0.71
0.81
0.91
6G
7G
8G
9G
10G
0.6
0.7
0.8
0.9
1.0
0.713
0.813
0.913
1.013
1.1 3
1.01
1.1
1.2
1.31
1.41
1 G
1 G
13G
14G
15G
1.1
1.2
1.3
1.4
1.5
1.2 3
1.313
1.413
1.513
1.613
1.51
1.61
1.71
1.81
1.91
16G
17G
18G
19G
20G
1.6
1.7
1.8
1.9
2.0
1.713
1.813
1.913
2.013
2.1 3
2.01
2.1
2.2
2.31
2.41
2 G
2 G
23G
24G
25G
2.1
2.2
2.3
2.4
2.5
2.2 3
2.313
2.413
2.513
2.613
2.51
2.61
2.71
2.81
2.91
26G
27G
28G
29G
3 G
2.6
2.7
2.8
2.9
3.0
2.713
2.813
2.913
3.013
3.1 3
3.01
3.1
3.2
3.31
3.41
3/8 in UNF
1J
2J
3
4
5
0.1
0.2
0.3
0.4
0.5
0.2 3
0.313
0.413
0.513
0.613
0.51
0.61
0.71
0.81
0.91
a
Se 7.3
+0
– 0.0
+0.0
–
Trang 8Ta le 2 — Bearing leng th L, clam ping leng th M
and overal leng th E
Ta le 2 — Bearing leng th L, clam ping leng th M
and overal leng th E
Dimensions in inches
Part No
a
L
m in
6
7
8
9
10
0.6
0.7
0.8
0.9
1.0
0.713
0.813
0.913
1.013
1.1 3
1.01
1.1
1.2
1.31
1.41
1 J
1 J
13
14
15
1.1
1.2
1.3
1.4
1.5
1.2 3
1.313
1.413
1.513
1.613
1.51
1.61
1.71
1.81
1.91
16
17
18
19
20
1.6
1.7
1.8
1.9
2.0
1.713
1.813
1.913
2.013
2.1 3
2.01
2.1
2.2
2.31
2.41
2 J
2 J
23
24
25
2.1
2.2
2.3
2.4
2.5
2.2 3
2.313
2.413
2.513
2.613
2.51
2.61
2.71
2.81
2.91
26
27
28
29
3 J
2.6
2.7
2.8
2.9
3.0
2.713
2.813
2.913
3.013
3.1 3
3.01
3.1
3.2
3.31
3.41
31J
32J
3 J
3 J
3 J
3.1
3.2
3.3
3.4
3.5
3.2 3
3.313
3.413
3.513
3.613
3.51
3.61
3.71
3.81
3.91
7/1 in UNF
1L
2L
3L
4L
5L
0.1
0.2
0.3
0.4
0.5
0.23
0.3 0
0.4 0
0.5 0
0.6 0
0.5
0.6
0.7
0.8
0.9
6L
7L
0.6
0.7
0.7 0
0.8 0
1.0
1.14
a
Se 7.3
+0
– 0.0
+0.0
–
Dimensions in inches
Part No
a
L
m in
8L
9L
10L
0.8
0.9
1.0
0.9 0
1.0 0
1.13
1.24
1.3
1.4
1 L
1 L
13L
14L
15L
1.1
1.2
1.3
1.4
1.5
1.23
1.3 0
1.4 0
1.5 0
1.6 0
1.5
1.6
1.7
1.8
1.9
16L
17L
18L
19L
20L
1.6
1.7
1.8
1.9
2.0
1.7 0
1.8 0
1.9 0
2.0 0
2.13
2.0
2.14
2.24
2.3
2.4
2 L
2 L
23L
24L
25L
2.1
2.2
2.3
2.4
2.5
2.23
2.3 0
2.4 0
2.5 0
2.6 0
2.5
2.6
2.7
2.8
2.9
26L
27L
28L
29L
3 L
2.6
2.7
2.8
2.9
3.0
2.7 0
2.8 0
2.9 0
3.0 0
3.13
3.0
3.14
3.24
3.3
3.4
31L
32L
3 L
3 L
3 L
3.1
3.2
3.3
3.4
3.5
3.23
3.3 0
3.4 0
3.5 0
3.6 0
3.5
3.6
3.7
3.8
3.9
3 L
3 L
3 L
3 L
4 L
3.6
3.7
3.8
3.9
4.0
3.7 0
3.8 0
3.9 0
4.0 0
4.13
4.0
4.14
4.24
4.3
4.4
1/2 in UNF
1N
2N
3N
0.1
0.2
0.3
0.23
0.3 0
0.4 0
0.5
0.6
0.7
a
Se 7.3
+0
– 0.0
+0.0
–
Trang 9Table 2 — Bearing leng th L, clam ping leng th M
and overal leng th E
Ta le 2 — Bearing leng th L , clam ping leng th M
and overal leng th E
Dimensions in inches
Part No
a
L
m in
4N
5N
0.4
0.5
0.5 0
0.6 0
0.8
0.9
6N
7N
8N
9N
10N
0.6
0.7
0.8
0.9
1.0
0.7 0
0.8 0
0.9 0
1.0 0
1.13
1.0
1.14
1.24
1.3
1.4
1 N
1 N
13N
14N
15N
1.1
1.2
1.3
1.4
1.5
1.23
1.3 0
1.4 0
1.5 0
1.6 0
1.5
1.6
1.7
1.8
1.9
16N
17N
18N
19N
20N
1.6
1.7
1.8
1.9
2.0
1.7 0
1.8 0
1.9 0
2.0 0
2.13
2.0
2.14
2.24
2.3
2.4
2 N
2 N
23N
24N
25N
2.1
2.2
2.3
2.4
2.5
2.23
2.3 0
2.4 0
2.5 0
2.6 0
2.5
2.6
2.7
2.8
2.9
26N
27N
28N
29N
3 N
2.6
2.7
2.8
2.9
3.0
2.7 0
2.8 0
2.9 0
3.0 0
3.13
3.0
3.14
3.24
3.3
3.4
31N
32N
3 N
3 N
3 N
3.1
3.2
3.3
3.4
3.5
3.23
3.3 0
3.4 0
3.5 0
3.6 0
3.5
3.6
3.7
3.8
3.9
3 N
3 N
3 N
3 N
4 N
3.6
3.7
3.8
3.9
4.0
3.7 0
3.8 0
3.9 0
4.0 0
4.13
4.0
4.14
4.24
4.3
4.4
a
Se 7.3
+0
– 0.0
+0.0
–
Dimensions in inches
Part No
a
L
m in
41N
42N
4 N
4 N
4 N
4.1
4.2
4.3
4.4
4.5
4.23
4.3 0
4.4 0
4.5 0
4.6 0
4.5
4.6
4.7
4.8
4.9
9/1 in UNF
1P
2P
3P
4P
5P
0.1
0.2
0.3
0.4
0.5
0.241
0.3 1
0.4 1
0.5 1
0.6 1
0.5
0.6
0.7
0.8
0.9
6P
7P
8P
9P
10P
0.6
0.7
0.8
0.9
1.0
0.7 1
0.8 1
0.9 1
1.0 1
1.141
1.0
1.15
1.25
1.3
1.4
1 P
1 P
13P
14P
15P
1.1
1.2
1.3
1.4
1.5
1.241
1.3 1
1.4 1
1.5 1
1.6 1
1.5
1.6
1.7
1.8
1.9
16P
17P
18P
19P
20P
1.6
1.7
1.8
1.9
2.0
1.7 1
1.8 1
1.9 1
2.0 1
2.141
2.0
2.15
2.25
2.3
2.4
2 P
2 P
23P
24P
25P
2.1
2.2
2.3
2.4
2.5
2.241
2.3 1
2.4 1
2.5 1
2.6 1
2.5
2.6
2.7
2.8
2.9
26P
27P
28P
29P
3 P
2.6
2.7
2.8
2.9
3.0
2.7 1
2.8 1
2.9 1
3.0 1
3.141
3.0
3.15
3.25
3.3
3.4
31P
32P
3.1
3.2
3.241
3.3 1
3.5
3.6
a
Se 7.3
+0
– 0.0
+0.0
–
Trang 10Ta le 2 — Bearing leng th L, clam ping leng th M
and overal leng th E
Ta le 2 — Bearing leng th L, clam ping leng th M
and overal leng th E
Dimensions in inches
Part No
a
L
m in
3 P
3 P
3 P
3.3
3.4
3.5
3.4 1
3.5 1
3.6 1
3.7
3.8
3.9
3 P
3 P
3 P
3 P
4 P
41P
42P
4 P
4 P
4 P
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
3.7 1
3.8 1
3.9 1
4.0 1
4.141
4.241
4.3 1
4.4 1
4.5 1
4.6 1
4.0
4.15
4.25
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5/8 in UNF
1Q
2Q
3Q
4Q
5Q
0.1
0.2
0.3
0.4
0.5
0.241
0.3 1
0.4 1
0.5 1
0.6 1
0.5
0.6
0.7
0.8
0.9
6Q
7Q
8Q
9Q
10Q
0.6
0.7
0.8
0.9
1.0
0.7 1
0.8 1
0.9 1
1.0 1
1.141
1.0
1.16
1.26
1.3
1.4
1 Q
1 Q
13Q
14Q
15Q
1.1
1.2
1.3
1.4
1.5
1.241
1.3 1
1.4 1
1.5 1
1.6 1
1.5
1.6
1.7
1.8
1.9
16Q
17Q
18Q
19Q
20Q
1.6
1.7
1.8
1.9
2.0
1.7 1
1.8 1
1.9 1
2.0 1
2.141
2.0
2.16
2.26
2.3
2.4
2 Q
2 Q
23Q
2.1
2.2
2.3
2.241
2.3 1
2.4 1
2.5
2.6
2.7
a
Se 7.3
+0
– 0.0
+0.0
–
Dimensions in inches
Part No
a
L
m in
24Q
25Q
2.4
2.5
2.5 1
2.6 1
2.8
2.9
26Q
27Q
28Q
29Q
3 Q
2.6
2.7
2.8
2.9
3.0
2.7 1
2.8 1
2.9 1
3.0 1
3.141
3.0
3.16
3.26
3.3
3.4
31Q
32Q
3 Q
3 Q
3 Q
3.1
3.2
3.3
3.4
3.5
3.241
3.3 1
3.4 1
3.5 1
3.6 1
3.5
3.6
3.7
3.8
3.9
3 Q
3 Q
3 Q
3 Q
4 Q
3.6
3.7
3.8
3.9
4.0
3.7 1
3.8 1
3.9 1
4.014
4.141
4.0
4.16
4.26
4.3
4.4
41Q
42Q
4 Q
4 Q
4 Q
4.1
4.2
4.3
4.4
4.5
4.241
4.3 1
4.4 1
4.5 1
4.6 1
4.5
4.6
4.7
4.8
4.9
3/4 in UNF
1S
2S
3S
4S
5S
0.1
0.2
0.3
0.4
0.5
0.25
0.3 5
0.4 5
0.5 5
0.6 5
0.5
0.6
0.7
0.8
0.9
6S
7S
8S
9S
10S
0.6
0.7
0.8
0.9
1.0
0.7 5
0.8 5
0.9 5
1.0 5
1.15
1.0
1.19
1.29
1.3
1.4
1 S
1 S
13S
1.1
1.2
1.3
1.25
1.3 5
1.4 5
1.5
1.6
1.7
a
Se 7.3
+0
– 0.0
+0.0
–
Trang 11Table 2 — Bearing leng th L, clam ping leng th M
and overal leng th E
Dimensions in inches
Part No
a
L
m in
14S
15S
1.4
1.5
1.5 5
1.6 5
1.8
1.9
16S
17S
18S
19S
20S
1.6
1.7
1.8
1.9
2.0
1.7 5
1.8 5
1.9 5
2.0 5
2.15
2.0
2.19
2.29
2.3
2.4
2 S
2 S
23S
24S
25S
2.1
2.2
2.3
2.4
2.5
2.25
2.3 5
2.4 5
2.5 5
2.6 5
2.5
2.6
2.7
2.8
2.9
26S
27S
28S
29S
3 S
2.6
2.7
2.8
2.9
3.0
2.7 5
2.8 5
2.9 5
3.0 5
3.15
3.0
3.19
3.29
3.3
3.4
31S
32S
3 S
3 S
3 S
3.1
3.2
3.3
3.4
3.5
3.25
3.3 5
3.4 5
3.5 5
3.6 5
3.5
3.6
3.7
3.8
3.9
3 S
3 S
3 S
3 S
4 S
3.6
3.7
3.8
3.9
4.0
3.7 5
3.8 5
3.9 5
4.0 5
4.15
4.0
4.19
4.29
4.3
4.4
41S
42S
4 S
4 S
4 S
4.1
4.2
4.3
4.4
4.5
4.25
4.3 5
4.4 5
4.5 5
4.6 5
4.5
4.6
4.7
4.8
4.9
a
Se 7.3
+0
– 0.0
+0.0
–
Trang 13List ofreferences ( se claus 2)
Norm ative r f r nces
BSI standards publ cations
B ITISH STANDARDS INSTITUTIO , Lon on
BS 3A 10 :19 1, Spe ifica tion f r gener a l r equir ements fr bolts a nd fr ee r un ing n ts o tensile str ength
not exc ed ing1249MPa
1)
BS 2S 14 :19 6, Spe ifica tion fr0.5% nickel-chr omium-mol ybd en m ste l ba r s f r the ma nufa ctur e o
fr ged bolts a nd fr ged n ts
BS 2S 14 :19 6, Spe ifica tion fr1.7 % nickel-chr omium-mol ybd en m ste l ba r s fr the ma nufa ctur e o
fr ged bolts a nd fr ged n ts
BS S 15 :19 6, Spe ifica tion 2½% nickel -chr omium-molybd en m ste l billets, ba r s, fr gings a nd
pa r ts(8 0–1080MPa : l imiing r uling s cton150mm)
BS S 15 :19 7, Spe ifica tion fr1 % chr omium-molybd en m ste l ba r s f r the ma nufa ctur e o f r ged bol ts
a nd fr ged n ts
Other referenc s
[ 1] DEF STAN 0 -19 Electr o-D eposi ion o Ca d mium, av ai a le f om Ministry of Defence ( Procurement
Executiv e), Directorate of Stand rdization, Kentig ern House, 6 Brown St Glasg owG2 8EX
Inform ative ref rences
BSI standards publ cations
B ITISH STANDARDS INSTITUTIO , Lon on
BS 3A 10 :19 5, Spe ifica tion f r ste l shea r bol ts (Unified hexa gons a nd Unied thr ea d s)
2)
BS 2A 1 0:19 2, Spe ifica tion f r ste l n ts (Unified hexa gons a nd Unified thr ea d s) f r shea r bolts f r
a ir cr a ft
2)
BS 2S 9 :19 4, Spe ifica tion fr2½perc nt nickel-chr omium-molybd enum ste l (5 /65tonf/sq in: limi ing
r ul ing s cton6in)
3)
Trang 14
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