5310-01-132-4408, WASHER,FLAT

National Stock Number:
5310-01-132-4408

Federal Supply Class:
5310

National Item Identification Number:
011324408

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:

SS4409-013

78286

SIKORSKY AIRCRAFT CORPORATION

Techincal Specification:

MATERIAL	STEEL COMP 301 OR
	STEEL COMP 302 OR
	STEEL COMP 304 OR
	STEEL COMP 316 OR
	STEEL COMP 321 OR
	STEEL COMP 347 OR
	STEEL COMP 348 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5059 MIL SPEC 1ST MATERIAL RESPONSE OR
	MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OR
	MIL-S-5059 MIL SPEC 3RD MATERIAL RESPONSE OR
	MIL-S-5059 MIL SPEC 4TH MATERIAL RESPONSE OR
	MIL-S-6721 MIL SPEC 5TH MATERIAL RESPONSE OR
	MIL-S-6721 MIL SPEC 6TH MATERIAL RESPONSE OR
	MIL-S-6721 MIL SPEC 7TH MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	SS8435,FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL
CENTER HOLE SHAPE STYLE	ROUND
HOLE DIAMETER	0.255 INCHES MINIMUM AND
	0.275 INCHES MAXIMUM
PERIPHERAL SHAPE STYLE	ROUND
OVERALL DIAMETER	0.720 INCHES MINIMUM AND
	0.780 INCHES MAXIMUM
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
THICKNESS	0.058 INCHES MINIMUM AND
	0.066 INCHES MAXIMUM
THE MANUFACTURERS DATA
MANUFACTURERS CODE	78286
DESIGN CONTROL REFERENCE	SS4409-013

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