5305-01-478-3453 SCREW,MACHINE Index 5310-01-478-3456 WASHER,FLAT

National Stock Number:
5310-01-478-3454

Federal Supply Class:
5310

National Item Identification Number:
014783454

Description:
WASHER,FLAT

Detail:
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.


Manufacturer Information:
7260732-P103538LOCKHEED MARTIN CORPORATION
7260732-P1K7626THALES UK LIMITED DBA THALES UK LTDUNDERWATER SYSTEMS
7260732-P1U2935ARNOLD WRAGG LIMITED


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
OVERALL DIAMETER0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM
MATERIALSTEEL COMP 316 OVERALL
PERIPHERAL SHAPE STYLEROUND
SPECIAL FEATURESTHICKNESS, 0.050 IN PORM .005; FINISH, PASSIVATE, QQ-P-35


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