NSN 5305-00-531-0139, 5305005310139
SCREW,ASSEMBLED WASHER

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 005310139
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

Manufacture or supply this part?
Join our growing community of certified suppliers.

Let Us Know

CALL ABOUT NSN 5305-00-531-0139

Our client representatives are standing by to help fulfill your request.

+1-321-773-5710

REQUEST QUOTE for 5305-00-531-0139

Have a list that needs to be quoted? Upload it here.

Upload a List

DLMS^® Summary

National Stock Number 5305-00-531-0139

National Stock Number (NSN) 5305-00-531-0139, or NIIN 005310139, (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 5305005310139 contains an unknown precious metal.

This information was last updated on Aug 01, 2025.

Technical Characteristics

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
HARDNESS RATING: (CQFM) 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM PRIMARY WASHER
FASTENER LENGTH: (AASB) 0.438 INCHES NOMINAL
HEAD DIAMETER: (AASL) 0.389 INCHES MINIMUM AND 0.414 INCHES MAXIMUM
HEAD HEIGHT: (AASU) 0.155 INCHES MINIMUM AND 0.170 INCHES MAXIMUM
HEAD STYLE: (AASK) FILLISTER
INTERNAL DRIVE STYLE: (ABQZ) CROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER: (AHYM) 0.250 INCHES
PRIMARY WASHER MATERIAL THICKNESS: (CTJJ) 0.063 INCHES MINIMUM
PRIMARY WASHER OUTSIDE DIAMETER: (CSPG) 0.384 INCHES MINIMUM AND 0.400 INCHES MAXIMUM
PRIMARY WASHER STYLE: (CTHW) SPLIT HELICAL RING
THREAD CLASS: (AAJD) 2A
THREAD LENGTH: (AASA) 0.312 INCHES MAXIMUM
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD QUANTITY PER INCH: (CMLP) 20
THREAD SERIES DESIGNATOR: (THSD) UNC
WASHER QUANTITY: (AAVW) 1
SURFACE TREATMENT: (SFTT) CADMIUM OVERALL OR ZINC OVERALL