NSN 5305-00-042-0988, 5305000420988
Cancelled -> Replaced by 5305002319936

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 000420988
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 5305-00-042-0988

National Stock Number (NSN) 5305-00-042-0988, or NIIN 000420988, (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, 5305002319936.

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 5305000420988 contains an unknown precious metal.

This information was last updated on Jun 01, 2025.

Technical Characteristics

SURFACE TREATMENT: (SFTT) CADMIUM OVERALL OR ZINC OVERALL
FASTENER LENGTH: (AASB) 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
HARDNESS RATING: (CQFM) 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
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) SLOT
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) SAE 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) 0.460 INCHES MINIMUM AND 0.475 INCHES MAXIMUM
PRIMARY WASHER STYLE: (CTHW) FLAT EXTERNAL TEETH
WASHER QUANTITY: (AAVW) 1
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
SURFACE TREATMENT: (SFTT) CADMIUM OR ZINC OVERALL
THREAD CLASS: (AAJD) 2A
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD LENGTH: (AASA) 0.153 INCHES MINIMUM AND 0.289 INCHES MAXIMUM
THREAD QUANTITY PER INCH: (CMLP) 20
THREAD SERIES DESIGNATOR: (THSD) UNC