National Item Identification Number
00-978-0883
National Stock Number
Item Name
WASHER,RECESSED
Federal Supply Class
5310
Description
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.
Commercial and Government Entity Code (Supplier Data)
05606
GENERAL DYNAMICS ARMAMENT AND
TECHNICAL PRODUCTS INC.
128 LAKESIDE AVE
BURLINGTON
VT
05401
802-657-6109
05606
GENERAL DYNAMICS ARMAMENT AND
TECHNICAL PRODUCTS INC.
128 LAKESIDE AVE
BURLINGTON
VT
05401
802-657-6109
Reference Numbers (Part Numbers)
135B5661
135B661
Required Categories
MATERIAL
SURFACE TREATMENT
HARDNESS RATING
STYLE DESIGNATOR
HOLE DIAMETER
O
Required Description
STEEL OVERALL
PHOSPHATE OVERALL
30.0 ROCKWELL C MINIMUM AND
35.0 ROCKWELL C M
