5310-01-170-6256, WASHER,FLAT

National Stock Number:
5310-01-170-6256

Federal Supply Class:
5310

National Item Identification Number:
011706256

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:

S6028

12511

SIMMONDS PRECISION PRODUCTS INC

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
HARDNESS RATING	48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
HOLE DIAMETER	0.640 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 420 OVERALL
III MINIMUM TENSILE STRENGTH	200000 POUNDS PER SQUARE INCH
PERIPHERAL SHAPE STYLE	ROUND
PROPRIETARY CHARACTERISTICS	PACS
OUTSIDE LEFT CORNER CHAMFER ANGLE	45.0 DEGREES NOMINAL
OUTSIDE RIGHT CORNER CHAMFER ANGLE	45.0 DEGREES NOMINAL
OVERALL DIAMETER	1.375 INCHES MINIMUM AND 1.378 INCHES MAXIMUM
SURFACE FINISH	63.0 MICROINCHES ALL SURFACES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	NS177,FSCM 12511 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THICKNESS	0.078 INCHES MINIMUM AND 0.082 INCHES MAXIMUM

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