5305-01-434-2956 SCREW,MACHINE Index 5320-01-434-2958 PIN-RIVET

National Stock Number:
5310-01-434-2957

Federal Supply Class:
5310

National Item Identification Number:
014342957

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:
803-6397262 PC3253711NAVAL SEA SYSTEMS COMMAND
803-6397262-3253711NAVAL SEA SYSTEMS COMMAND
8100-1251-0310 PC NO 3270876BATH IRON WORKS CORPORATION


Techincal Specification:
MATERIALCOPPER ALLOY 485 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B 21, C48599, TEMER H02 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.656 INCHES NOMINAL
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER1.375 INCHES NOMINAL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.062 INCHES NOMINAL


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