BSI BS 4320:1968

Withdrawn Revision
Specification for metal washers for general engineering purposes. Metric series

Best Price Guarantee May 23, 1968 English 22 Pages

This Document Has Been Superseded

Newer publications replace it: BSI BS EN ISO 7091, BSI BS EN ISO 7092, BSI BS EN ISO 7093-1 and 3 more


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BSI BS 4320:1968

Specification for metal washers for general engineering purposes. Metric series

PUBLISH DATE 1968
PAGES 22
BSI BS 4320:1968

REAFFIRMED IN 10/1/2012

Relates to bright metal and black metal washers for use with ISO metric bolts, screws and nuts.

The washers are basically divided into 3 categories of size: 'normal', 'large' and 'extra large' diameter series and the bright washers are further divided by including a 'light range' which have thicknesses approximately 60 per cent of the 'normal range' thicknesses.

The bright metal washers cover the range for bolts, M1 to M39, and the black metal washers cover the range M5 to M68.

Appendix gives details of sizes greater than 68 mm diameter, up to and including size M150.

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