NSN 5305-00-042-4985, 5305000424985
SCREW,ASSEMBLED WASHER

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 000424985
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: We have 1 qualified suppliers

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DLMS^® Summary

National Stock Number 5305-00-042-4985

National Stock Number (NSN) 5305-00-042-4985, or NIIN 000424985, (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 is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts.

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

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 5305000424985 does not contain precious metals.

This information was last updated on Aug 01, 2025.

Technical Characteristics

MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) SAE ASSN STD 3RD MATERIAL RESPONSE OR SAE ASSN STD 4TH MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) QQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
FASTENER LENGTH: (AASB) 0.500 INCHES NOMINAL
HEAD DIAMETER: (AASL) 0.443 INCHES MINIMUM AND 0.472 INCHES MAXIMUM
HEAD HEIGHT: (AASU) 0.160 INCHES MINIMUM AND 0.175 INCHES MAXIMUM
HEAD STYLE: (AASK) ROUND
INTERNAL DRIVE STYLE: (ABQZ) CROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER: (AHYM) 0.250 INCHES
PRIMARY WASHER MATERIAL THICKNESS: (CTJJ) 0.025 INCHES NOMINAL
PRIMARY WASHER OUTSIDE DIAMETER: (CSPG) 0.466 INCHES MINIMUM AND 0.478 INCHES MAXIMUM
PRIMARY WASHER STYLE: (CTHW) FLAT INTERNAL TEETH
THREAD CLASS: (AAJD) 2A
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD LENGTH: (AASA) 0.500 INCHES MAXIMUM
THREAD QUANTITY PER INCH: (CMLP) 28
SURFACE TREATMENT: (SFTT) CADMIUM OVERALL OR ZINC OVERALL
THREAD SERIES DESIGNATOR: (THSD) UNF
WASHER QUANTITY: (AAVW) 1
SURFACE TREATMENT: (SFTT) CADMIUM OR ZINC OVERALL
HARDNESS RATING: (CQFM) 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM PRIMARY WASHER