BRITISH STANDARD AEROSPACE SERIES BS A 254, BS A 255, BS A 256, BS A 257, BS A 258, BS A 259 1976 Incorporating Amendment Nos 1 and 2 Hexagonal head titanium alloy bolts 160 000 lbf/in2 (1100 MPa) UDC[.]
Trang 1BS A 255,
Incor por a ting
A mend ment Nos.1
a nd2
2
Trang 2BS A258, BS A259:1976
This BritishStan ard,hav ing
b en a prov ed b the
Aerosp ceIn ustry
Stan ardsCommit e ,
waspublshed u der the
authority f the Ex cutiv
Bo rdon
3 Marh1 7
© BSI0 -2 0
The folowing BSI references
relate to the work on this
stan ard:
Commite reference ACE/12
Draft for comment7 /37 6 DC
ISBN 0 5 0 0 7 6 9
This BritishStand rd has be n prep red to prov ide a rang e
of16 0 0lbf/i
2
( 110 MPa) to18 0 0lbf/i
2
( 125 MPa) titanium aloy
bolts with UNJ profie threa s and close tolerance shanks for aerosp ce use
The leng ths of the bolts are in f actional inc ements.W hen considering the use
of ca mium plated titanium bolts, at ention is drawn to DARD Tech ical
Cir ular No.292 which recommends certain l mitations on their use
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 plcation
Com planc with a British Standard does not of itself c nfer im munity
f om leg al oblg ations
Sum m ary of pag es
This document comprises a font cov er, an inside f ont cov er, p g esi andi,
p g es1 to8 and a b ck cov er
This stand rd has be n up ated ( se copy rig ht d ate) and ma hav e ha
amendments incorporated This wi be indicated in the amendment ta le on
the inside f ont cov er
Am endments is ued sinc publ cation
Amd No Date of is ue Comments
26 7 July 19 8
281 Apri 19 9 Indicated b a sidel ne in the marg in
Trang 3BS A258, BS A 259:1976
BS A258, BS A 259:1976
Pag e
Appendix A Ta le for the conv er ion of inches to mi lmetre equiv alents 8
Fig ure 2 — Alternativ e bolt hea manufacturer option W asher
Fig ure 3 — Ty pical disposition of the v arious marking s 7
Ta le 4 — Bearing leng th L, ov eral leng th E and dimension M 4
Trang 5BS A 258, BS A259:1976
This BritishStand rd specifies the materials,dimensions,finish and inspection requirements for titanium
aloy bolts with hex g onal hea s and UNJ threa for aerosp ce use
This stand rd makes reference to the fol owing BritishStand rds and Ministry of Defence publ cations:
BS4 8 , Unified s r ew thr ea d s o “UNJ”ba sic pr ofile
BS A101, Gener a l r equir ements f r t ta nium bolts
BS A242-24 , Hexa gona l ca stl e n ts ( fcla ss3B UNJ thr ea d )
BS TA28, For ging stock a nd wir e o tta nium-a luminium-va na d ium a ll oy
(tensile str ength1 100–1 300MPa ) (limiing r uling s cton20mm)
DTD9 4, Ca d mium pla ting
DTD9 2, A nod ising o t ta nium a nd t ta nium a lloys
DEF STAN91–19/1, Lubr ica nt, sol id film, hea t cur ed
The latest editions of these stand rds shal be used
NOT The v lues in imp rial u its are to b re arded as the stan ard The ta le in App n ix A pro ides mi imetre e uiv lents of
inch dimensions an is b sed on the ta les in BS3 0 “ Conver sion factor s a d tabl es”
3.1The bolts shal be man factured, inspected and tested in ac ord nce with the requirements of BS A101
3.2 All bolts shal conform to the dimensions and tolerances g iv en in Ta le 1, Ta le 2 and Ta le 4, and
Fig ure 1 and Fig ure 2 Unles otherwise specified, the dimensions are those before the a pl cation of
surace treatment The material requirements shal be as specified
Fig ure 1 — Basic
dimensions
Fig ure 2 — Alternative
bolt hea m anufacturer
option Washer fac
and/or dim pled hea
Trang 6BS A 258, BS A259:1976
Ta le 1 — Dimensions (standard shank diameter )
Ta le 1 — Dimensions (standard shank diameter )
( 1) The s rew thre ds shal conform to the b sic thre d form, diameter an related pitches sp cified in BS4 8 ,“Unified s r ew thr ead s
of “UNJ”basic profil e” ( clas 3A)
( 2) Before a plcation of protectiv tre tment
( 3) After a plcation of protectiv tre tment
( 4) The ru out of the thre d shal comply with the rele ant re uirements of SBAC publcation RS6 8
( 5) Se Ta le 4 for leng th dimensions “L”,“ E” an “ M”
( 6) To suit he a onal castle n ts sp cified in BS A24 –24
( 7) Holes shal ha e the sharp edg s remo ed
( 8) K
ma
=B
min
( 9) For diameter codes0 ,0 an 0 the tolerance shal b
For diameter codes0 ,0 an 0 the tolerance shal b
Ta le 2 — Over ize shank diam eter
Diam ete
Co e
Nom inal
thr a
siz
Nom inal
shan
diam ete
Ty e:
BS A2 4
BS A2 5
BS A2 6(2)
Ty e
BS A2 7(3)
2×Pitch
Re
Diam ete
co e
ÌK
(8)
( 9)
All dimensions in inches
Diam ete
co e
Nom inal
thr a
siz UNJF
Ty e:
BS A2 4
BS A2 5
BS A2 6( 2)
Ty e:
BS A2 7( 3)
Ty e:
BS A2 4
BS A2 5
BS A2 6(2)
Ty e:
BS A2 7( 3)
+0.0 5
– 0
+0.0 8
–0
+0.0 5
–0
+0
–0.0 2
+0.0 5
0
+0.0 7
0
Trang 7BS A 258, BS A259:1976
Ta le 3 — Material
Basic BS n m be Ty e of m ate ial Me hanical pro e ties Prote tive tr atm ent
BS A25 Titanium aloy to
BS TA28
0.2% pro f stres : not les
than14 0 0lbf/ i
2
( 97 MPa)
None
DTD9 2
16 0 0lbf/i
2
(1 10 MPa)
and not more than
18 0 0lbf/ i
2
(1 25 MPa)
Anodiz d in ac ord nce with
DTD9 2 +MoS
2
in ac ord nce with DEF STAN
91–19/1
with DTD9 4, on nickel strike
0 :
notles than8%
Not y et alocated
Trang 8BS A 258, BS A259:1976
Ta le 4 — Bearing leng th L, overal leng th E and dim ension M
NOT Unalocated diameter/ leng th codes shal not b used
All dimensions in inches
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 3
0 3
0 3
0 3
0 3
0 3
0 4
0 4
0 4
0 4
0 4
0 5
0.0 2
0.1 5
0.1 8
0.2 0
0.3 2
0.3 5
0.4 8
0.5 0
0.5 2
0.6 5
0.6 8
0.7 0
0.8 2
0.8 5
0.9 8
1.0 0
1.0 2
1.1 5
1.1 8
1.2 0
1.3 2
1.3 5
1.4 8
1.5 0
1.5 2
1.6 5
1.6 8
1.7 0
1.8 2
1.8 5
1.9 8
2.0 0
2.1 5
2.2 0
2.3 5
2.5 0
2.6 5
2.7 0
2.8 5
3.0 0
3.1 5
0.4 8
0.5 1
0.5 4
0.6 6
0.7 8
0.7 1
0.8 4
0.9 6
0.9 8
1.0 1
1.0 4
1.1 6
1.2 8
1.2 1
1.3 4
1.4 6
1.4 8
1.5 1
1.5 4
1.6 6
1.7 8
1.7 1
1.8 4
1.9 6
1.9 8
2.0 1
2.0 4
2.1 6
2.2 8
2.2 1
2.3 4
2.4 6
2.5 1
2.6 6
2.7 1
2.9 6
3.0 1
3.1 6
3.2 1
3.4 6
3.5 1
0.3 3
0.3 6
0.4 9
0.5 1
0.5 3
0.6 6
0.7 9
0.7 1
0.8 3
0.8 6
0.9 9
1.0 1
1.0 3
1.1 6
1.2 9
1.2 1
1.3 3
1.3 6
1.4 9
1.5 1
1.5 3
1.6 6
1.7 9
1.7 1
1.8 3
1.8 6
1.9 9
2.0 1
2.0 3
2.1 6
2.2 9
2.2 1
1.3 6
2.5 1
2.6 6
2.7 1
2.8 6
3.0 1
3.1 6
3.2 1
3.3 6
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 3
0 3
0 3
0 3
0 3
0 3
0 4
0 4
0 4
0 4
0 4
0 5
0.0 2
0.1 5
0.1 8
0.2 0
0.3 2
0.3 5
0.4 8
0.5 0
0.5 2
0.6 5
0.6 8
0.7 0
0.8 2
0.8 5
0.9 8
1.0 0
1.0 2
1.1 5
1.1 8
1.2 0
1.3 2
1.3 5
1.4 8
1.5 0
1.5 2
1.6 5
1.6 8
1.7 0
1.8 2
1.8 5
1.9 8
2.0 0
2.1 5
2.2 0
2.3 5
2.5 0
2.6 5
2.7 0
2.8 5
3.0 0
3.1 5
0.5 0
0.5 3
0.6 6
0.7 8
0.7 0
0.8 3
0.9 6
0.9 8
1.0 0
1.0 3
1.1 6
1.2 8
1.2 0
1.3 3
1.4 6
1.4 8
1.5 0
1.5 3
1.6 6
1.7 8
1.7 0
1.8 3
1.9 6
1.9 8
2.0 0
2.0 3
2.1 6
2.2 8
2.2 0
2.3 3
2.4 6
2.4 8
2.5 3
2.7 8
2.8 3
2.9 8
3.0 3
3.2 8
3.3 3
3.4 8
3.5 3
0.3 5
0.4 8
0.4 1
0.5 3
0.6 5
0.6 8
0.7 1
0.8 3
0.8 5
0.9 8
0.9 1
1.0 3
1.1 5
1.1 8
1.2 1
1.3 3
1.3 5
1.4 8
1.4 1
1.5 3
1.6 5
1.6 8
1.7 1
1.8 3
1.8 5
1.9 8
1.9 1
2.0 3
2.1 5
2.1 8
2.2 1
2.3 3
2.4 8
2.5 3
2.6 8
2.8 3
2.9 8
3.0 3
3.1 8
3.3 3
3.4 8
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 3
0 3
0 3
0 3
0 3
0 3
0 4
0 4
0 4
0 4
0 4
0 5
0.0 2
0.1 5
0.1 8
0.2 0
0.3 2
0.3 5
0.4 8
0.5 0
0.5 2
0.6 5
0.6 8
0.7 0
0.8 2
0.8 5
0.9 8
1.0 0
1.0 2
1.1 5
1.1 8
1.2 0
1.3 2
1.3 5
1.4 8
1.5 0
1.5 2
1.6 5
1.6 8
1.7 0
1.8 2
1.8 5
1.9 8
2.0 0
2.1 5
2.2 0
2.3 5
2.5 0
2.6 5
2.7 0
2.8 5
3.0 0
3.1 5
0.5 3
0.6 6
0.7 9
0.7 1
0.8 3
0.9 6
0.9 9
1.0 1
1.0 3
1.1 6
1.2 9
1.2 1
1.3 3
1.4 6
1.4 9
1.5 1
1.5 3
1.6 6
1.7 9
1.7 1
1.8 3
1.9 6
1.9 9
2.0 1
2.0 3
2.1 6
2.2 9
2.2 1
2.3 3
2.4 6
2.4 9
2.5 1
2.6 6
2.7 1
2.9 6
3.0 1
3.1 6
3.2 1
3.4 6
3.5 1
3.6 6
0.4 3
0.4 6
0.5 9
0.6 1
0.6 3
0.7 6
0.7 9
0.8 1
0.9 3
0.9 6
1.0 9
1.1 1
1.1 3
1.2 6
1.2 9
1.3 1
1.4 3
1.4 6
1.5 9
1.6 1
1.6 3
1.7 6
1.7 9
1.8 1
1.9 3
1.9 6
2.0 9
2.1 1
2.1 3
2.2 6
2.2 9
2.3 1
2.4 6
2.6 1
2.7 6
2.8 1
2.9 6
3.1 1
3.2 6
3.3 1
3.4 6
Trang 9BS A 258, BS A259:1976
Ta le 4— Bearing leng th L, overal leng th E and dimension M
All dimensions in inches
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./ength
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
0 5
0 5
0 5
0 5
0 6
0 6
0 6
0 6
0 6
0 7
0 7
0 7
0 7
0 7
0 8
0 8
0 8
0 8
0 8
0 9
0 9
0 9
0 9
3.2 0
3.3 5
3.5 0
3.6 5
3.7 0
3.8 5
4.0 0
4.1 5
4.2 0
4.3 5
4.5 0
4.6 5
4.7 0
4.8 5
5.0 0
5.1 5
5.2 0
5.3 5
5.5 0
5.6 5
5.7 0
5.8 5
6.0
3.6 6
3.7 1
3.9 6
4.0 1
4.1 6
4.2 1
4.4 6
4.5 1
4.6 6
4.7 1
4.9 6
5.0 1
5.1 6
5.2 1
5.4 6
5.5 1
5.6 6
5.7 1
5.9 6
6.0 1
6.1 6
6.2 1
6.4 6
3.5 1
3.6 6
3.7 1
3.8 6
4.0 1
4.1 6
4.2 1
4.3 6
4.5 1
4.6 6
4.7 1
4.8 6
5.0 1
5.1 6
5.2 1
5.3 6
5.5 1
5.6 6
5.7 1
5.8 6
6.0 1
6.1 6
6.2 1
0 5
0 5
0 5
0 5
0 6
0 6
0 6
0 6
0 6
0 7
0 7
0 7
0 7
0 7
0 8
0 8
0 8
0 8
0 8
0 9
0 9
0 9
0 9
3.2 0
3.3 5
3.5 0
3.6 5
3.7 0
3.8 5
4.0 0
4.1 5
4.2 0
4.3 5
4.5 0
4.6 5
4.7 0
4.8 5
5.0 0
5.1 5
5.2 0
5.3 5
5.5 0
5.6 5
5.7 0
5.8 5
6.0 0
3.7 8
3.8 3
3.9 8
4.0 3
4.2 8
4.3 3
4.4 8
4.5 3
4.7 8
4.8 3
4.9 8
5.0 3
5.2 8
5.3 3
5.4 8
5.5 3
5.7 8
5.8 3
5.9 8
6.0 3
6.2 8
6.3 3
6.4 8
3.5 3
3.6 8
3.8 3
3.9 8
4.0 3
4.1 8
4.3 3
4.4 8
4.5 3
4.6 8
4.8 3
4.9 8
5.0 3
5.1 8
5.3 3
5.4 8
5.5 3
5.6 8
5.8 3
5.9 8
6.0 3
6.1 8
6.3 3
0 5
0 5
0 5
0 5
0 6
0 6
0 6
0 6
0 6
0 7
0 7
0 7
0 7
0 7
0 8
0 8
0 8
0 8
0 8
0 9
0 9
0 9
0 9
3.2 0
3.3 5
3.5 0
3.6 5
3.7 0
3.8 5
4.0 0
4.1 5
4.2 0
4.3 5
4.5 0
4.6 5
4.7 0
4.8 5
5.0 0
5.1 5
5.2 0
5.3 5
5.5 0
5.6 5
5.7 0
5.8 5
6.0 0
3.7 1
3.9 6
4.0 1
4.1 6
4.2 1
4.4 6
4.5 1
4.6 6
4.7 1
4.9 6
5.0 1
5.1 6
5.2 1
5.4 6
5.5 1
5.6 6
5.7 1
5.9 6
6.0 1
6.1 6
6.2 1
6.4 6
6.5 1
3.6 1
3.7 6
3.8 1
3.9 6
4.1 1
4.2 6
4.3 1
4.4 6
4.6 1
4.7 6
4.8 1
4.9 6
5.1 1
5.2 6
5.3 1
5.4 6
5.6 1
5.7 6
5.8 1
5.9 6
6.1 1
6.2 6
6.3 1
Trang 10BS A 258, BS A259:1976
Ta le 4 — Bearing leng th L, overal leng th E and dim ension M
All dimensions in inches
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 3
0 3
0 3
0 3
0 3
0 3
0 4
0 4
0 4
0 4
0 4
0 5
0 5
0 5
0 5
0 5
0 6
0 6
0 6
0 6
0 6
0 7
0.1 5
0.1 8
0.2 0
0.3 2
0.3 5
0.4 8
0.5 0
0.5 2
0.6 5
0.6 8
0.7 0
0.8 2
0.8 5
0.9 8
1.0 0
1.0 2
1.1 5
1.1 8
1.2 0
1.3 2
1.3 5
1.4 8
1.5 0
1.5 2
1.6 5
1.6 8
1.7 0
1.8 2
1.8 5
1.9 8
2.0 0
2.1 5
2.2 0
2.3 5
2.5 0
2.6 5
2.7 0
2.8 5
3.0 0
3.1 5
3.2 0
3.3 5
3.5 0
3.6 5
3.7 0
3.8 5
4.0 0
4.1 5
4.2 0
4.3 5
0.7 6
0.8 9
0.8 1
0.9 4
1.0 6
1.0 9
1.1 1
1.2 3
1.2 6
1.3 9
1.3 1
1.4 3
1.5 6
1.5 9
1.6 1
1.7 3
1.7 6
1.8 9
1.8 1
1.9 3
2.0 6
2.0 9
2.1 1
2.2 3
2.2 6
2.3 9
2.3 1
2.4 3
2.5 6
2.5 9
2.6 1
2.7 6
2.8 1
3.0 6
3.1 1
3.2 6
3.3 1
3.5 6
3.6 1
3.7 6
3.8 1
4.0 6
4.1 1
4.2 6
4.3 1
4.5 6
4.6 1
4.7 6
4.8 1
5.0 6
0.5 1
0.6 4
0.6 6
0.7 9
0.8 1
0.8 4
0.9 6
0.9 8
1.0 1
1.1 4
1.1 6
1.2 8
1.3 1
1.3 4
1.4 6
1.4 8
1.5 1
1.6 4
1.6 6
1.7 8
1.8 1
1.8 4
1.9 6
1.9 8
2.0 1
2.1 4
2.1 6
2.2 8
2.3 1
2.3 4
2.4 6
2.5 1
2.6 6
2.8 1
2.9 6
3.0 1
3.1 6
3.3 1
3.4 6
3.5 1
3.6 6
3.8 1
3.9 6
4.0 1
4.1 6
4.3 1
4.4 6
4.5 1
4.6 6
4.8 1
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 3
0 3
0 3
0 3
0 3
0 3
0 4
0 4
0 4
0 4
0 4
0 5
0 5
0 5
0 5
0 5
0 6
0 6
0 6
0 6
0 6
0 7
0.1 5
0.1 8
0.2 0
0.3 2
0.3 5
0.4 8
0.5 0
0.5 2
0.6 5
0.6 8
0.7 0
0.8 2
0.8 5
0.9 8
1.0 0
1.0 2
1.1 5
1.1 8
1.2 0
1.3 2
1.3 5
1.4 8
1.5 0
1.5 2
1.6 5
1.6 8
1.7 0
1.8 2
1.8 5
1.9 8
2.0 0
2.1 5
2.2 0
2.3 5
2.5 0
2.6 5
2.7 0
2.8 5
3.0 0
3.1 5
3.2 0
3.3 5
3.5 0
3.6 5
3.7 0
3.8 5
4.0 0
4.1 5
4.2 0
4.3 5
0.7 1
0.8 4
0.9 6
0.9 8
1.0 1
1.0 4
1.1 6
1.2 8
1.2 1
1.3 4
1.4 6
1.4 8
1.5 1
1.5 4
1.6 6
1.7 8
1.7 1
1.8 4
1.9 6
1.9 8
2.0 1
2.0 4
2.1 6
2.2 8
2.2 1
2.3 4
2.4 6
2.4 8
2.5 1
2.5 4
2.6 6
2.7 1
2.9 6
3.0 1
3.1 6
3.2 1
3.4 6
3.5 1
3.6 6
3.7 1
3.9 6
4.0 1
4.1 6
4.2 1
4.4 6
4.5 1
4.6 6
4.7 1
4.9 6
5.0 1
0.6 6
0.6 9
0.7 1
0.8 3
0.8 6
0.9 9
0.9 1
1.0 3
1.1 6
1.1 9
1.2 1
1.3 3
1.3 6
1.4 9
1.4 1
1.5 3
1.6 6
1.6 9
1.7 1
1.8 3
1.8 6
1.9 9
1.9 1
2.0 3
2.1 6
2.1 9
2.2 1
2.3 3
2.3 6
2.4 9
2.4 1
2.6 6
2.7 1
2.8 6
2.9 1
3.1 6
3.2 1
3.3 6
3.4 1
3.6 6
3.7 1
3.8 6
3.9 1
4.1 6
4.2 1
4.3 6
4.4 1
4.6 6
4.7 1
4.8 6
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 2
0 3
0 3
0 3
0 3
0 3
0 3
0 4
0 4
0 4
0 4
0 4
0 5
0 5
0 5
0 5
0 5
0 6
0 6
0 6
0 6
0 6
0 7
0.1 5
0.1 8
0.2 0
0.3 2
0.3 5
0.4 8
0.5 0
0.5 2
0.6 5
0.6 8
0.7 0
0.8 2
0.8 5
0.9 8
1.0 0
1.0 2
1.1 5
1.1 8
1.2 0
1.3 2
1.3 5
1.4 8
1.5 0
1.5 2
1.6 5
1.6 8
1.7 0
1.8 2
1.8 5
1.9 8
2.0 0
2.1 5
2.2 0
2.3 5
2.5 0
2.6 5
2.7 0
2.8 5
3.0 0
3.1 5
3.2 0
3.3 5
3.5 0
3.6 5
3.7 0
3.8 5
4.0 0
4.1 5
4.2 0
4.3 5
0.9 7
0.9 0
1.0 2
1.0 4
1.1 7
1.2 0
1.2 2
1.3 4
1.4 7
1.4 0
1.5 2
1.5 4
1.6 7
1.7 0
1.7 2
1.8 4
1.9 7
1.9 0
2.0 2
2.0 4
2.1 7
2.2 0
2.2 2
2.3 4
2.4 7
2.4 0
2.5 2
2.5 4
2.6 7
2.7 0
2.7 2
2.9 7
3.0 2
3.1 7
3.2 2
3.4 7
3.5 2
3.6 7
3.7 2
3.9 7
4.0 2
4.1 7
4.2 2
4.4 7
4.5 2
4.6 7
4.7 2
4.9 7
5.0 2
5.1 7
0.7 7
0.7 0
0.8 2
0.9 4
0.9 7
1.0 0
1.0 2
1.1 4
1.2 7
1.2 0
1.3 2
1.4 4
1.4 7
1.5 0
1.5 2
1.6 4
1.7 7
1.7 0
1.8 2
1.9 4
1.9 7
2.0 0
2.0 2
2.1 4
2.2 7
2.2 0
2.3 2
2.4 4
2.4 7
2.5 0
2.5 2
2.7 7
2.8 2
2.9 7
3.0 2
3.2 7
3.3 2
3.4 7
3.5 2
3.7 7
3.8 2
3.9 7
4.0 2
4.2 7
4.3 2
4.4 7
4.5 2
4.7 7
4.8 2
4.9 7
Trang 11BS A 258, BS A259:1976
Ta le 4 — Bearing leng th L , overal leng th E and dim ension M
5 Identification and m arking
The bolts shal hav e the man facturer’s identification and ful p rt n mber a pled to the up er face of the
hea except for the10–32 UNJF siz in which case the diameter code( 03) ma be omit ed
The method of marking bolts and p ckag es shal be as specified in BS A101
Fig ure 3 shows a ty pical disposition of the v arious marking s
All dimensions in inches
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./eng th
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
Dia./ength
co e
L
±0.0 0
E
±0.0 5
M
±0.0 0
0 7
0 7
0 7
0 7
0 8
0 8
0 8
0 8
0 8
0 9
0 9
0 9
0 9
4.5 0
4.6 5
4.7 0
4.8 5
5.0 0
5.1 5
5.2 0
5.3 5
5.5 0
5.6 5
5.7 0
5.8 5
6.0 0
5.1 1
5.2 6
5.3 1
5.5 6
5.6 1
5.7 6
5.8 1
6.0 6
6.1 1
6.2 6
6.3 1
6.5 6
6.6 1
4.9 6
5.0 1
5.1 6
5.3 1
5.4 6
5.5 1
5.6 6
5.8 1
5.9 6
6.0 1
6.1 6
6.3 1
6.4 6
0 7
0 7
0 7
0 7
0 8
0 8
0 8
0 8
0 8
0 9
0 9
0 9
0 9
4.5 0
4.6 5
4.7 0
4.8 5
5.0 0
5.1 5
5.2 0
5.3 5
5.5 0
5.6 5
5.7 0
5.8 5
6.0 0
5.1 6
5.2 1
5.4 6
5.5 1
5.6 6
5.7 1
5.9 6
6.0 1
6.1 6
6.2 1
6.4 6
6.5 1
6.6 6
4.9 1
5.1 6
5.2 1
5.3 6
5.4 1
5.6 6
5.7 1
5.8 6
5.9 1
6.1 6
6.2 1
6.3 6
6.4 1
0 7
0 7
0 7
0 7
0 8
0 8
0 8
0 8
0 8
0 9
0 9
0 9
0 9
4.5 0
4.6 5
4.7 0
4.8 5
5.0 0
5.1 5
5.2 0
5.3 5
5.5 0
5.6 5
5.7 0
5.8 5
6.0 0
5.2 2
5.4 7
5.5 2
5.6 7
5.7 2
5.9 7
6.0 2
6.1 7
6.2 2
6.4 7
6.5 2
6.6 7
6.7 2
5.0 2
5.2 7
5.3 2
5.4 7
5.5 2
5.7 7
5.8 2
5.9 7
6.0 2
6.2 7
6.3 2
6.4 7
6.5 2
Fig ure 3 — Typical disposition of the v rious m arking s
Trang 12BS A 258, BS A259:1976
Appendix A Table for the conversion ofinches to m il im etr equivalents
1
2
3
4
5
6
7
8
9
10
25.4
5 8
7 2
101.6
1 7.0
152.4
17 8
20 2
2 8.6
25 0