Product Details | RECESSED WASHER

5310-01-261-6718 A washer of any peripheral shape having a centrally located hole. Both bearing surfaces are parallel and flat, but one or both of the bearing surfaces must be broken by a counterbore, countersink, or similarly shaped recess. The thickness must not exceed 25 per cent of the outside diameter or the largest outside dimension. The maximum limit of the tolerance or range applied to the thickness and/or largest outside dimension must be used to determine compliance. Excludes WASHER, CONCAVE, RETAINER, PACKING, and thrust type washers. See also SPACER, SLEEVE; and SPACER, STEPPED.

Part Alternates: 7402235, 5310-01-261-6718, 01-261-6718, 5310012616718, 012616718

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 17 AUG 1987 01-261-6718

Drawings & Photos | NSN 5310-01-261-6718


Cross Reference | NSN 5310-01-261-6718

Part Number Cage Code Manufacturer
7402235 19207 U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM

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Technical Data | NSN 5310-01-261-6718

Characteristic Specifications
MATERIAL STEEL OVERALL
SURFACE TREATMENT CADMIUM AND ZINC OVERALL
HARDNESS RATING 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
STYLE DESIGNATOR 28 RECESSED BOTH SIDES
HOLE DIAMETER 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM
OUTSIDE DIAMETER 0.844 INCHES NOMINAL
MATERIAL THICKNESS 0.188 INCHES NOMINAL
TOP RECESS DIAMETER 0.505 INCHES MINIMUM AND 0.520 INCHES MAXIMUM
BOTTOM RECESS DIAMETER 0.505 INCHES MINIMUM AND 0.520 INCHES MAXIMUM
BOTTOM RECESS ANGLE 90.0 DEGREES NOMINAL
TOP RECESS ANGLE 90.0 DEGREES NOMINAL

Restrictions/Controls & Freight Information | NSN 5310-01-261-6718

Category Code Description
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information