NSN 5305-00-285-5262, 5305002855262
SCREW,ASSEMBLED WASHER

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 002855262
Codification Country: United States
Item Name Code: INC 06660
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

Availability: Readily Available Qualified Suppliers: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 5305-00-285-5262

National Stock Number (NSN) 5305-00-285-5262, or NIIN 002855262, (screw,assembled washer) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are no manufacturer part numbers associated to this NSN.

This part number has not been procured by the US Government in over 5 years.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Mar 02, 2006, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.

This NSN is assigned to Item Name Code (INC) 06660. [A SCREW, (AS MODIFIED) TO WHICH HAS BEEN ASSEMBLED ONE OR MORE NONREMOVABLE WASHER(S).]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5305002855262 contains an unknown precious metal.

This information was last updated on Aug 01, 2025.

Technical Characteristics

MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) UNABLE TO DECODE
SURFACE TREATMENT: (SFTT) CADMIUM OVERALL OR ZINC OVERALL
COUNTERSINK ANGLE: (CRSQ) 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
FASTENER LENGTH: (AASB) 0.625 INCHES NOMINAL
HEAD DIAMETER: (AASL) 0.477 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
HEAD STYLE: (AASK) FLAT COUNTERSUNK
INTERNAL DRIVE STYLE: (ABQZ) CROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER: (AHYM) 0.250 INCHES
PRIMARY WASHER MATERIAL THICKNESS: (CTJJ) 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM
PRIMARY WASHER OUTSIDE DIAMETER: (CSPG) 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM
PRIMARY WASHER STYLE: (CTHW) COUNTERSINK EXTERNAL TEETH
SURFACE TREATMENT: (SFTT) CADMIUM OR ZINC OVERALL
THREAD CLASS: (AAJD) 2A
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD LENGTH: (AASA) 0.472 INCHES MINIMUM
THREAD SERIES DESIGNATOR: (THSD) UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH: (CMLP) 20
WASHER QUANTITY: (AAVW) 1
THREAD SERIES DESIGNATOR: (THSD) UNC