5310-01-522-7977, WASHER,FLAT

National Stock Number:
5310-01-522-7977

Federal Supply Class:
5310

National Item Identification Number:
015227977

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:

BACW10BP28APU

81205

THE BOEING COMPANY

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
HOLE DIAMETER	1.749 INCHES MINIMUM AND 1.760 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	IRON ALLOY 660 OVERALL
III MINIMUM TENSILE STRENGTH	140000 POUNDS PER SQUARE INCH
III PART NAME ASSIGNED BY CONTROLLING AGENCY	WASHER, PLAIN
PERIPHERAL SHAPE STYLE	ROUND
PROPRIETARY CHARACTERISTICS	PACS
OVERALL DIAMETER	3.305 INCHES MINIMUM AND 3.325 INCHES MAXIMUM
SPECIAL FEATURES	HEAT TREAT TO MINIMUM TENSILE STRENGTH PER AMS-H-6875; SERVICE TEMPERATURE 1200.0 DEGREES F. MAXIMUM; USE ON GEAR INSTALLATION-SECTION 62 NLG. VAR.
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS-QQ-P-35, TYPE II OR TYPE VIII ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THICKNESS	0.117 INCHES MINIMUM AND 0.133 INCHES MAXIMUM

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