BS SP 55 and SP 56:1953
Specifications for double coil spring washers for aircraft

Standard No.

BS SP 55 and SP 56:1953

Release Date

1953

Published By

British Standards Institution (BSI)

Status

Be replaced

Replace By

BS SP 55 and SP 56:1953+A3:2016

Latest

BS SP 55 and SP 56:1953+A3:2016

Scope

These British Standards specify the materials, dimen-sions and finish of double coil spring washers for aircraft, suitable for use with bolts and nuts with B.A., B.S.F., or UNF. threads.

BS SP 55 and SP 56:1953 history

• 1953 BS SP 55 and SP 56:1953+A3:2016 Specification for washers, spring, double coil (inch sizes), steel, cadmium plated and phosphor bronze. For aircraft
• 1953 BS SP 55 and SP 56:1953 Specifications for double coil spring washers for aircraft