NSN 5305-00-285-5272, 5305002855272
SCREW,ASSEMBLED WASHER

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 002855272
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 5305-00-285-5272

National Stock Number (NSN) 5305-00-285-5272, or NIIN 002855272, (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 3 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 2 suppliers are listed as Active suppliers 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 somewhat common among different platforms, belonging to 2 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 Mar 09, 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 5305002855272 contains an unknown precious metal.

This NSN is associated to Schedule B 7318152000: bolts and bolts and their nuts or washers exported in the same shipment. The Schedule B End Use is listed as iron and steel products, other. NAICS classification category 332722: bolt, nut, screw, rivet, and washer manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

MATERIAL: (MATT) STEEL COMP 1010 FASTENER OR STEEL COMP 1011 FASTENER OR STEEL COMP 1013 FASTENER OR STEEL COMP 1015 FASTENER OR STEEL COMP 1016 FASTENER OR STEEL COMP 1017 FASTENER OR STEEL COMP 1018 FASTENER OR STEEL COMP 1019 FASTENER OR STEEL COMP 1020 FASTENER
SURFACE TREATMENT: (SFTT) CADMIUM OVERALL OR ZINC OVERALL
MATERIAL: (MATT) STEEL COMP 1050 PRIMARY WASHER OR STEEL COMP 1551 PRIMARY WASHER OR STEEL COMP 1552 PRIMARY WASHER OR STEEL COMP 1053 PRIMARY WASHER OR STEEL COMP 1054 PRIMARY WASHER OR STEEL COMP 1055 PRIMARY WASHER OR STEEL COMP 1059 PRIMARY WASHER OR STEEL COMP 1060 PRIMARY WASHER OR STEEL COMP 1561 PRIMARY WASHER OR STEEL COMP 1566 PRIMARY WASHER
THREAD SERIES DESIGNATOR: (THSD) UNC
FASTENER LENGTH: (AASB) 0.500 INCHES NOMINAL
HARDNESS RATING: (CQFM) 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM PRIMARY WASHER
HEAD DIAMETER: (AASL) 0.594 INCHES MINIMUM AND 0.615 INCHES MAXIMUM
HEAD HEIGHT: (AASU) 0.162 INCHES MINIMUM AND 0.178 INCHES MAXIMUM
HEAD STYLE: (AASK) PAN NO. 2
INTERNAL DRIVE STYLE: (ABQZ) SLOT
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) SAE ASSN STD ALL MATERIAL RESPONSES FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) SAE ASSN STD ALL MATERIAL RESPONSES PRIMARY WASHER
MATERIAL: (MATT) STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 FASTENER
MATERIAL: (MATT) STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1566 PRIMARY WASHER
NOMINAL THREAD DIAMETER: (AHYM) 0.312 INCHES
PRIMARY WASHER MATERIAL THICKNESS: (CTJJ) 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM
PRIMARY WASHER OUTSIDE DIAMETER: (CSPG) 0.588 INCHES MINIMUM AND 0.610 INCHES MAXIMUM
PRIMARY WASHER STYLE: (CTHW) FLAT EXTERNAL TEETH
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) 0.324 INCHES MINIMUM AND 0.472 INCHES MAXIMUM
THREAD SERIES DESIGNATOR: (THSD) UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH: (CMLP) 18
WASHER QUANTITY: (AAVW) 1
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) UNABLE TO DECODE