3110-00-844-0511 BEARING,ROLLER,NEEDLE Index 2530-00-844-0520 CHAMBER,AIR BRAKE

National Stock Number:
5310-00-844-0515

Federal Supply Class:
5310

National Item Identification Number:
008440515

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:
261506306424ALLIANT TECHSYSTEMS OPERATIONS LLC
261506356232LOCKHEED MARTIN CORPORATION
C31200014888818KEARFOTT CORPORATION


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.343 INCHES NOMINAL
OVERALL DIAMETER0.875 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B139,HARD,FINISH 31 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY 842 OVERALL
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-T-10727 TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTTIN OVERALL


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