5310-01-338-3370 WASHER,FLAT Index 5320-01-338-3372 PIN-RIVET

National Stock Number:
5310-01-338-3371

Federal Supply Class:
5310

National Item Identification Number:
013383371

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:
BACW10BN71SP08073MAMCO MFG CO INC
BACW10BN71SP09772WEST COAST LOCKWASHER CO., INC.
BACW10BN71SP10630ANILLO INDUSTRIES LLC
BACW10BN71SP56878SPS TECHNOLOGIES, LLC
BACW10BN71SP58009MOELLER MANUFACTURING & SUPPLY, LLC
BACW10BN71SP81205THE BOEING COMPANY


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.454 INCHES MINIMUM AND 0.465 INCHES MAXIMUM
OVERALL DIAMETER0.830 INCHES MINIMUM AND 0.850 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALIRON ALLOY 660 OVERALL
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THICKNESS0.064 INCHES MINIMUM AND 0.078 INCHES MAXIMUM


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