National Item Identification Number
00-453-2555
National Stock Number
Item Name
WASHER,FLAT
Federal Supply Class
5310
Description
A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use SHIM. For items fabricated from ceramic or electrically rated materials by specification or industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE, graphite impregnated and lubricated items.
Commercial and Government Entity Code (Supplier Data)
K7766
BRITISH STANDARDS INSTITUTION
389 CHISICK HIGH ROAD
LONDON
W4 4AL
UNITED KINGDOM
0208 996 9000
K0662
SELEX SENSORS & AIRBORNE SYSTEMS
SYSTEMS
2 CREWE ROAD NORTH CREWE TOLL
EDINBURGH
EH5 2XS
UNITED KINGDOM
0131 343 4953
K0488
PLASTICABLE LTD
UNIT 3 RIVERWEY INDUSTRIAL PARK NEWM
LANE
ALTON
GU34 2QL
UNITED KINGDOM
01420 80911
Reference Numbers (Part Numbers)
SP27B
21172-424
7862-2
Required Categories
MATERIAL
HOLE DIAMETER
PERIPHERAL SHAPE STYLE
OVERALL DIAMETER
CENTER HOLE S
Required Description
STEEL OVERALL
0.152 INCHES MINIMUM AND
0.157 INCHES MAXIMUM
1 ROUND
0.296 IN