5310-01-478-3454 WASHER,FLAT Index 4820-01-478-3457 VALVE,CALIBRATED FLOW

National Stock Number:
5310-01-478-3456

Federal Supply Class:
5310

National Item Identification Number:
014783456

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-P203538LOCKHEED MARTIN CORPORATION
7260732-P2K7626THALES UK LIMITED DBA THALES UK LTDUNDERWATER SYSTEMS
7260732-P2U2935ARNOLD WRAGG LIMITED


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM
OVERALL DIAMETER1.245 INCHES MINIMUM AND 1.270 INCHES MAXIMUM
MATERIALSTEEL COMP 316 OVERALL
PERIPHERAL SHAPE STYLEROUND
SPECIAL FEATURESTHICKNESS, 0.100 IN PORM .005; FINISH, PASSIVATE, QQ-P-35


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