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National Stock Number:
5310-00-397-4508
Federal Supply Class:
5310
National Item Identification Number:
003974508
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:
| 31407L9 | 91816 | CIRCOR AEROSPACE, INC. |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.250 INCHES MINIMUM AND 0.251 INCHES MAXIMUM | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT | | MATERIAL DOCUMENT AND CLASSIFICATION | SP-1,FSCM 52780 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | PLASTIC OVERALL | | OVERALL DIAMETER | 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE FINISH | 63.0 MICROINCHES BOTTOM | | SURFACE FINISH | 63.0 MICROINCHES TOP | | THICKNESS | 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM |
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