Bsi bs au 001c 1989 (2000) iso 337 1981

BRITISH STANDARD AUTOMOBILE SERIES BS AU 1c 1989 ISO 337 1981 (Superseding BS AU 1b 1977) Specification for Dimensions of “50” fifth wheel king pin for semi trailers [ISO title Road vehicles — 50 semi[.]

ISO 337:1981

(Super sed ing

B SA U1b:19 7)

[ISO title: Road vehicles— 50 sem i-trai er fifth whe l c upl ng

pin— Basic and m ounting /interchang eabi ity dim ensions]

U C 6 9.1 4.3.0 1.7:( 08 3)

Committees responsible for this

The prep ration of this BritishStand rd was entrusted b the Automobi e

Stand rds Commit e ( AUE/-) to Tech ical Commit e AUE/13 upon which the

fol owing bodies were represented:

British Raiway s Board

Dep rtment of Transport ( Hig hway s)

Freig ht Transport Association

Health an Safety Executiv e

Institute of Roa Transport Eng ine r

Lond on Reg ional Transport

Ministry of Defence

National Bus Comp ny

Roa Haulag e Association

Society of Motor Man facturer an Trad er

Pag e

4 Dimensional characteristic for mou ting

National foreword

This rev ision of BSAU1 has be n prep red u d er the d irection of the Automobie

Stand ards Commit e and is id entical with ISO3 7:19 1 “R oa d vehicle —50

s mi-tr a iler fifth whe l couplng pin— B a sic a nd mou tng/i ter cha ngea bii y

d imensions” publshed b the International Org anization for Stand rdization

( ISO) This revision super edes BSAU1b:19 7 which is withdrawn

Term inolog y and conventions The text of the International Stand rd has

be n a prov ed as suita le for publcation as a BritishStand rd without

d ev iation Some terminolog y and certain conv entions are not identical with those

used in BritishStand rds; at ention is d rawn especialy to the fol owing

The comma has be n used as a decimal marker In BritishStand ards it is cur ent

practice to use a ful point on the b selne as the decimal marker

W herev er the words “ International Stand rd” a pear,refer ing to this stand rd ,

they should be rea as “BritishStand ard ”

Cros -referenc The Tech ical Commit e has rev iewed the prov isions of

ISO4 8 , to which 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

1 Scope and field ofappl cation

This International Stand ard specifies the dimensions of the5 [Ì5 ,8mm ( 2in)] fifth whe l coupl ng pin

which is used for couplng semitraier to prime mov er , taking into ac ou t the l mitations of weig ht

g eneral y laid down b oficial req uirements

NOT If, for e tra he v -d ty v ehicles,this coupling in is not suficient,an9 [ Ì8 mm(3.5in) fifth whe l coupling in ac ording

to ISO4 8 shal b used

In ad dition, this International Stand ard specifies the d imensional characteristic neces ary for mou ting

an inter hang ea i ty

2 Ref r nce

ISO4 8 , R oa d vehicle —90s mi-tr a iler fifth whe l couplng pin— B a sic a nd

mou tng/i ter cha ngea biiy d imensions

3 Ba sic functiona l dimensions ofpin

Fig ure 1

4 Dimensiona l characteristics for mounting a nd intercha ng ea bi ity

B

ISO 337:1981

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