Product Details | RECESSED WASHER

5310-01-264-3615 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: VN90010C, VN900-10C, 21D5C10C, 5310-01-264-3615, 01-264-3615, 5310012643615, 012643615

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 29 SEP 1987 01-264-3615

Demand History | NSN 5310-01-264-3615

Part Number Request Date QTY Origin
21D5C10C 2025-09-266 145 United States

Cross Reference | NSN 5310-01-264-3615

Part Number Cage Code Manufacturer
21D5C10C 04236 LOCKHEED MARTIN CORPORATION DBA LOCKHEED MARTIN SPACE SYSTEMS
VN900-10C 92215 ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS

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Technical Data | NSN 5310-01-264-3615

Characteristic Specifications
MATERIAL IRON ALLOY 660
MATERIAL DOCUMENT AND CLASSIFICATION AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE
SURFACE TREATMENT PASSIVATE
HARDNESS RATING NOT RATED
HOLE DIAMETER 0.631 INCHES MINIMUM AND 0.643 INCHES MAXIMUM
OUTSIDE DIAMETER 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM
RECESS DIAMETER 0.785 INCHES MAXIMUM
MATERIAL THICKNESS 0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM
RECESS ANGLE 90.0 DEGREES NOMINAL

Restrictions/Controls & Freight Information | NSN 5310-01-264-3615

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
NMF Description 194160 WASHER OR GASKETS, IRON OR STEEL,
Less than car load rating
Less than truck load rating U 50.0
Water commodity Code 713 unknown
Originating Activity Code KH Defense Industrial Supply Center
Philadelphia, PA 19111
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity B Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable