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FIIG:  A022B0

Entry Date:  Apr-01-1974

Concept:  1

Status:  A

Applicability:  A

Type:  0

Definition:  A washer of any peripheral shape having a centrally located hole. Both bearing surfaces are parallel and flat, but one or both of the bearing surfaces must be broken by a counterbore, countersink, or similarly shaped recess. The thickness must not exceed 25 per cent of the outside diameter or the largest outside dimension. The maximum limit of the tolerance or range applied to the thickness and/or largest outside dimension must be used to determine compliance. Excludes: WASHER, CONCAVE, RETAINER, PACKING, and thrust type washers. See also SPACER, SLEEVE; and SPACER, STEPPED.

Basic INC:  70650

Basic Name:  WASHER

Description:  1. A perforated piece of metal, leather, or other material of various shapes and forms. It is used primarily as a seat for a bolt, nut, screw, rivet, or nail to distribute pressure and prevent endwise motion over an area, and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.