5305-01-178-9308 SCREW,CLOSE TOLERANCE Index 5331-01-178-9312 O-RING

National Stock Number:
5310-01-178-9310

Federal Supply Class:
5310

National Item Identification Number:
011789310

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:
19131M81412TREADWELL CORPORATION (DELAWARE)
19131MKM81412TREADWELL CORPORATION (DELAWARE)


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.760 INCHES MINIMUM AND 0.770 INCHES MAXIMUM
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER1.500 INCHES NOMINAL
THICKNESS0.143 INCHES MINIMUM AND 0.153 INCHES MAXIMUM


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