Bsi bs a 303 1994 (2000) iso 3185 1993

BRITISH STANDARD BS A 303 1994 ISO 3185 1993 Bolts, normal bihexagonal head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal[.]

Bolts, normal

This Bri shStan 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 referenceACE/12

Draft for comment9 /79 6 DC

ISBN 0 5 0 2 2 7 4

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

Stand rd 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 , Telecommunications and Busines

EquipmentIndustries

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 ISO318 :19 3 A er ospa ce—

B ols, nor ma l bihexa gona l 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 uncoa ted , str ength cla ss s le s tha n o equa l

to1100MPa— Dimensions, publ shed b the International Org anization for

Stand ard ization ( ISO)

The Technical Commit e has rev iewed the prov isions of ISO4 9 :19 8, to which

normativ e reference is ma e in the text, and has decid ed that they are ac epta le

for use in conju ction with this stand ard

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 nationalStand rd Cor esp nding BritishStand rd

ISO28 -2:19 8 BSEN2028 ISO system o lmis a nd fi s

Part2:19 2 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

( 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 fr bols a nd n ts

( 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 InternationalStand rd specifies the

d imensions of normal bihex g onal head bolts, with

close or larg e tolerance normal shank, an 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 InternationalStand 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 InternationalStand 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 InternationalStand 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

ISO4 9 :19 8, Fa stener s f r a er ospa ce

constr ucton— B i-hexa gona l wr enching

configur a tion

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

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 lt

Unco ted

b lt

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

b

H1 b

h1 b

f7 b

h1 b

1

1,1

±0,5

6,8 8,3 9,1

1,5

1,4

1,9

1,6 2,4

Diam ete

co e

1

L

2

L

3

1

Wr nching

d sh

n m be d

min h1

b

nom tol short medium short medium nom tol min

±0,2

7

8,5 5,2

0,7

2,8 3,5 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 ISO4 9 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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