5310-00-139-7053 WASHER,FLAT Index 5310-00-139-7058 NUT,PLAIN,HEXAGON

National Stock Number:
5310-00-139-7055

Federal Supply Class:
5310

National Item Identification Number:
001397055

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:
13211E831897403CECOM LR CENTER


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.625 INCHES MINIMUM AND 0.695 INCHES MAXIMUM
OVERALL DIAMETER0.954 INCHES MINIMUM AND 1.046 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D735,TY SB615 ASSN STD ALL MATERIAL RESPONSES OVERALL
MATERIALRUBBER NATURAL OR RUBBER SYNTHETIC OVERALL
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.176 INCHES MINIMUM AND 0.200 INCHES MAXIMUM


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