Bsi bs a 307 1994 (2000) iso 9254 1993

BRITISH STANDARD BS A 307 1994 ISO 9254 1993 Bolts, normal spline head, normal or pitch diameter shank, long length MJ threads, metallic material, coated or uncoated, strength classes less than or equ[.]

Bolts, norm al spline

U C 6 1.8 2.2 :6 9.7

This BritishStan ard,hav 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 August1 9

© BSI0 -2 0

The folowing BSI references

relate to the work on this

stan ard:

Commite reference ACE/12

Draft for comment9 /79 2 DC

ISBN 0 5 0 2 2 1 2

The prep ration of this BritishStand 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

EquipmentIndustries

British Industrial Fastner Federation

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 rd has be n prep red u der the direction of the Aerosp ce

Stand rds Polcy Commit e It is identical with ISO925 :19 3 Aer ospa ce —

B olts, nor ma l spline hea d , nor ma l o pich d ia meter sha nk, l ong l ength MJ

thr ea d s,meta ll ic ma ter ia l,coa ted o u coa ted , str ength cla ss s les tha n o equa l

to1 100MPa — D imensions publshed b the International Org anization for

Stand rdization ( ISO)

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

Cros - referenc s

Inte national Stand rd Cor esp nding BritishStand rd

ISO28 -2:19 8 BS EN2028 ISO system o l imis a nd fis

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

limi d evia tions fr hol es a nd sha fts

( Identical

ISO3 5 :19 2 BS2A231:19 3 R ol led thr ea d s fr bol ts Lea d a nd

r unout r equir ements

( Identical

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

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

( Identical

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

configur a tions Metr ic s r ie

( Identical

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 es1 to4, 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

1 Scope

This International Stand rd specifies the

dimensions of normal spl ne hea bolts, with

normalor pitch diameter shan , and long leng th

MJthrea s, in metal ic material, coated or

uncoated, with streng th clas es les than or equal

to110 MPa

It is intended for the drawing up of aerosp ce

product stand rds

2 Norm ative ref rences

The folowing stand rds contain prov isions which,

throug h reference in this text, constitute prov isions

of this International Stand rd At the time of

publ cation, the editions indicated were v al d All

stand rds 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 ity 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 al d International Stand rds

ISO28 -2:19 8, ISO system o limis a nd fi s —

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

limi d evia tions f r holes a nd sha fts

ISO3 5 :19 2, A er ospa ce — R ol led thr ea d s fr

bol ts— 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 f r bolts a nd nuts

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

constr ucton— Spl ine d r ive wr enching

configur a tion — Metr ic s r ie

3 Config uration and dim ensions

Se Fig ure 1 and Ta le 1 Dimensions and

tolerances are ex res ed in mi imetres They are

a pl ca le after any surace coating , but before the

a pl cation ofany lubricant

© BSI 0 -2 0 Fig ure 1

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

Normal Pitch diameter

b

1

± 0,5

1,4

h1 b

1,6

Diam ete

co e

1 cde

L

2 de

L

3

L

4

1

S T Wr nching

d sh

n m be f

min h1

b

4

0,7

0,7

2,8 3,5 0 0

6

a

In conformity with ISO5 5 -2

b

Se ISO2 6-2

c

Firt leng th, cor esp n ing to fir t L

4 length

d

Con itions L

1

min.an L

2

ma can ot b o tained simultane usly

e

Incements:

2 for L

4

u1 0

4 for L

4

>1 0

If gre ter lengths are re uired, the shal b chosen using these inc ements

f

In conformity with ISO7 0 ov er Tmin

+0,5

–0

0

–0,5

+0,4

–0

0

–0,2

0

–0,3

List ofreferences

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