NSN 5305-01-158-7820, 5305011587820
Cancelled -> Replaced by 5305011591288

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 011587820
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 5305-01-158-7820

National Stock Number (NSN) 5305-01-158-7820, or NIIN 011587820, (screw,assembled washer) was assigned July 29, 1983 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 5305011591288.

There are 3 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is 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 Nov 02, 2010. There have been 2 contracts issued for this part number, with 2 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 2 different suppliers. The last contract numbers awarded were: SPM5A411M0419, SPM5A307M1563. The total value of the awarded contracts has been US$ 1,341.79.

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 Dec 12, 2013, 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 5305011587820 does not contain precious metals.

This information was last updated on Jul 01, 2025.

Technical Characteristics

END ITEM IDENTIFICATION: (AGAV) TRUCK, FIRE/CRASH P10;VEHICLE, COMMERCIAL UTILITY CARGO (CUCV)
EXTENDED WASHER DIAMETER: (AATC) 8.50 MILLIMETERS MINIMUM AND 9.20 MILLIMETERS MAXIMUM
EXTENDED WASHER THICKNESS: (AATD) 0.75 MILLIMETERS MINIMUM AND 1.00 MILLIMETERS MAXIMUM
FASTENER LENGTH: (AASB) 15.92 MILLIMETERS MINIMUM AND 16.00 MILLIMETERS MAXIMUM
HARDNESS RATING: (CQFM) 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM PRIMARY WASHER
HEAD HEIGHT: (AASU) 3.75 MILLIMETERS MINIMUM AND 4.35 MILLIMETERS MAXIMUM
HEAD STYLE: (AASK) HEXAGON EXTENDED WASHER
INTERNAL DRIVE STYLE: (ABQZ) W/O INTERNAL DRIVE
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) G-6172-M FSCM 11862 MFR REF SINGLE MATERIAL RESPONSE BEARING SURFACE OF HEAD
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) SAE ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER
MATERIAL: (MATT) STEEL BEARING SURFACE OF HEAD
MATERIAL: (MATT) STEEL COMP 1050 PRIMARY WASHER
NONMACHINE NOMINAL THREAD DIAMETER: (CTYF) 4.2 MILLIMETERS
PRIMARY WASHER MATERIAL THICKNESS: (CTJJ) 0.56 MILLIMETERS NOMINAL
PRIMARY WASHER OUTSIDE DIAMETER: (CSPG) 19.48 MILLIMETERS MINIMUM AND 20.00 MILLIMETERS MAXIMUM
PRIMARY WASHER STYLE: (CTHW) DOME INTERNAL TEETH
SPECIAL FEATURES: (FEAT) POINT STYLE THREAD FORMING
WASHER QUANTITY: (AAVW) 1
WIDTH BETWEEN FLATS: (AATB) 6.78 MILLIMETERS MINIMUM AND 7.00 MILLIMETERS MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) G-4435-M CODE A MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) G-4435-M CODE A MFR REF SINGLE TREATMENT RESPONSE PRIMARY WASHER
SURFACE TREATMENT: (SFTT) PHOSPHATE BEARING SURFACE OF HEAD
SURFACE TREATMENT: (SFTT) PHOSPHATE PRIMARY WASHER
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD LENGTH: (AASA) 13.10 MILLIMETERS MINIMUM AND 15.92 MILLIMETERS MAXIMUM
THREAD PITCH IN MILLIMETERS: (CQQR) 1.41