Bsi bs a 308 1994 (2000) iso 9255 1993

BRITISH STANDARD BS A 308 1994 ISO 9255 1993 Bolts, normal spline head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1[.]

Bolts, normal spline

U C6 1.8 2.2 :6 9.7

This Bri sh Stan ard, ha ing

b en pre ared u der the

directonof the Aerosp ce

Stan ards Policy Commi e ,

waspublished u der the

authoriyof the Stan ards

Bo rdan comes into efect on

1 Aug ust1 9

© BSI0 -2 0

The folowing BSI references

relate to the work on this

stan ard:

Commi e reference ACE/ 12

Draft for comment9 / 79 3 DC

ISBN 0 5 0 2 2 2 0

The prep ration of this BritishStand ard was entrusted b the Aerosp ce

Stand ard s Pol cy Commit e ( ACE/-) to Tech ical Commit e ACE/ 12, upon

which the fol owing bod ies were represented :

The Association of Electronic , Telecommu ications and Busines Equipment

Ind ustries

British Industrial Fastener Fed eration

Ministry of Defence

Society of British Aerosp ce Comp nies Ltd

Am endm ents is ued sinc publ cation

Pag e

© BSI 0 -2 0

This BritishStand ard has be n prep red u der the d irection of the Aerosp ce

Stand ards Pol cy Commit e It is identical with ISO925 :19 3 A er ospa ce —

B ols, nor ma l splne hea d , nor ma l sha nk, shor t o med ium length MJ thr ea d s,

meta llc ma ter ia l, coa ted o u coa ted , str ength cla ss s le s tha n o equa l

to1100MPa — D imensions, publshed b the International Org anization for

Stand ard ization ( ISO)

A British Stand ard d oes not purport to includ e al the neces ary prov isions of a

contract User of British Stand rd s are responsible for their cor ect a plcation

Com pl anc with a British Standard does not ofitself confer im m unity

f om leg al o l g ations

Cros - referenc s

Inte national Stand rd Cor esp nding BritishStand rd

ISO28 -2:19 8 BS EN2028 ISO system o lmis a nd fis —

Part2:19 2Ta ble o sta nd a r d toler a nc gr a d es a nd

lmi d evia tions fr hole a nd sha fts

( Id entical

ISO3 5 :19 2 BS2A231:19 3 R oled thr ea d s fr bols Lea d a nd

r unout r equir ements

( Id entical

ISO5 5 -2:19 8 BS629 A er ospa ce MJ thr ea d s

Part2:19 4 Limi d imensions f r bols a nd n ts

( Id entical

ISO7 0 :19 3 BS A29 :19 4 Spe ifica tion fr splne d r ive wr enching

configur a tion Metr ic s r ie

( Id entical

Sum mary of pag es

This document comprises a f ont cov er, an insid e font cov er, p g esi andi ,

p g es1 to4, an inside b ck cov er and a b ck cov er

This stand rd has be n up ated ( se copy rig ht d ate) an ma hav e ha

amendments incorporated This wi l be indicated in the amendment ta le on the

inside f ont cov er

1 Scope

This International Stand rd specifies the

dimensions of normal splne head bolts, with close

or larg e tolerance normal shan , and short or

med ium leng th MJ threa s, in metal ic material,

coated or u coated , with streng th clas es les than

or equal to1 10 MPa

It is intended for the d rawing up of aerosp ce

product stand rd s

2 Normative r f r nces

The fol owing stand ard s contain prov isions which,

throug h reference in this text, constitute prov isions

of this International Stand ard At the time of

publcation, the editions ind icated were v ald All

stand ards are subject to rev ision, and p rties to

ag re ments b sed on this International Stand rd

are encourag ed to inv estig ate the pos ibi ty of

a ply ing the most recent editions of the stand rds

indicated below

Member of IEC and ISO maintain reg ister of

cur ently v ald International Stand rds

ISO28 -2:19 8, ISO system o lmis a nd fis —

Pa r t2: Ta ble o sta nd a r d toler a nc gr a d es a nd

lmi d evia tions fr hole a nd sha fts

ISO3 5 :19 2, A er ospa ce — R oled thr ea d s f r

bols— Lea d a nd r unout r equir ements

ISO5 5 -2:19 8, A er ospa ce — MJ thr ea d s —

Pa r t2: Limi d imensions fr bols a nd n ts

ISO7 0 :19 3, Fa stener s f r a er ospa ce

constr ucton— Splne d r ive wr enching

configur a tion — Metr ic s r ie

3 Config uration and dimensions

Se Fig ure 1 an Ta le 1 Dimensions and

tolerances are ex res ed in mi imetres They are

a plca le after any sur ace coating , but before the

a plcation of any lubricant

A

Ta le 1

Diam ete

co e

T r a a

D

1

D

2 D

3 D

4 D

5 D

6 D

7 D

8

Co ted b lts Unco ted b lts

close larg e close larg e nom tol min min ma H1

b

H1 b

h1 b

f7 b

h1 b

1 1,1

1,5

1,4

1,9

1,6 2,4

Diam ete

co e

1 c

L

2

L

3

1

Wr nching

d sh

n m be d

min h1

b

0 0 0,8 5,5 2 to4

±0,2

7 8,5 5,2

0,7

2,8 3,5 0 0

a

In conformiy wih ISO5 5 -2, e ce t for the ma imum major diameter “d” of b lts wih a close tolerance on D

1 , which shal b

e ual to D

1 min.–0,0 5

b

Se ISO2 6-2

c

Incements:

1 for L

1

u3

2 for3 <L

1

u1 0

4 for L

1

>1 0

If g re ter leng ths are re uired, the shal b chosen using these inc ements

d

In conformiy wih ISO7 0 o er Tmin

+0,5

0

–0,0 0

–0,0 5

0

–0,5

–0,0 3

–0,0 8

–0,0 6

–0,0 1

+0,4

0

0

– 0,2

0

– 0,3

b

B

3 9 Chiswick Hig h Roa

London

W 4 4AL

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