NSN 5305-00-042-0462, 5305000420462
Cancelled -> Replaced by 5305000420494

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 000420462
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 2 qualified suppliers

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DLMS^® Summary

National Stock Number 5305-00-042-0462

National Stock Number (NSN) 5305-00-042-0462, or NIIN 000420462, (screw,assembled washer) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 5305000420494.

There are 2 manufacturer part numbers associated with this NSN. One of those 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, with the most recent procurement date of Oct 31, 2018. There has been one contract issued for this part number, with one award given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE5E219V1021. The total value of the awarded contracts has been US$ 983.10.

This NSN is somewhat common among different platforms, belonging to 7 different weapons systems.

There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jun 02, 2005, 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 5305000420462 contains an unknown precious metal.

This information was last updated on Aug 01, 2025.

Technical Characteristics

FASTENER LENGTH: (AASB) 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
HEAD DIAMETER: (AASL) 0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM
HEAD HEIGHT: (AASU) 0.107 INCHES MINIMUM AND 0.119 INCHES MAXIMUM
HEAD STYLE: (AASK) ROUND
INTERNAL DRIVE STYLE: (ABQZ) CROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) UNABLE TO DECODE
NOMINAL THREAD DIAMETER: (AHYM) 0.164 INCHES
PRIMARY WASHER MATERIAL THICKNESS: (CTJJ) 0.020 INCHES NOMINAL
PRIMARY WASHER OUTSIDE DIAMETER: (CSPG) 0.327 INCHES MINIMUM AND 0.338 INCHES MAXIMUM
PRIMARY WASHER STYLE: (CTHW) FLAT INTERNAL TEETH
THREAD CLASS: (AAJD) 2A
THREAD LENGTH: (AASA) 0.312 INCHES MAXIMUM
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD QUANTITY PER INCH: (CMLP) 32
THREAD SERIES DESIGNATOR: (THSD) UNC
WASHER QUANTITY: (AAVW) 1
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
SURFACE TREATMENT: (SFTT) CADMIUM OR ZINC OVERALL
HARDNESS RATING: (CQFM) 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM PRIMARY WASHER
SURFACE TREATMENT: (SFTT) CADMIUM OVERALL OR ZINC 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