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National Stock Number:
5310-01-612-8452
Federal Supply Class:
5310
National Item Identification Number:
016128452
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.
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Manufacturer Information:
| LS35240P7 | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.470 INCHES MINIMUM AND 0.475 INCHES MAXIMUM | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | III SUPPLEMENTARY FEATURES | THESE WASHERS ARE INTENDED FOR USE WITH ALL OVERSIZE FASTENERS, INCLUDIG HIGH STRENGTH BOLTS. USE MS21299 FORSTANDARD DIAMTER BOLTS. SPECIFY (P) PLAIN WASHER FOR USE UNDER NUT AND (C) COUNTERSUNK WASHER FOR USE UNDER BOLT HEAD. | | PERIPHERAL SHAPE STYLE | ROUND | | PROPRIETARY CHARACTERISTICS | PACS | | OVERALL DIAMETER | 0.821 INCHES MINIMUM AND 0.831 INCHES MAXIMUM | | SPECIAL FEATURES | TEMPERATURE LIMITS: ALLOY STEEL 450 DEGREES F MAXIMUM; HEAT TREATMENT: 180 KSI, UTS MINIMUM; CIRCUMFERENCE: 0.600 MAXIMUM, 0.590 MINIMUM; APPROX. WEIGHT OF EACH IN POUNDS: 0.0063 | | THICKNESS | 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM |
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