NSN 5305-01-266-8341, 5305012668341
SCREW,ASSEMBLED WASHER

Federal Supply Classification: FSC 5305 - Screws
National Item Identification Number: NIIN 012668341
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.

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DLMS^® Summary

National Stock Number 5305-01-266-8341

National Stock Number (NSN) 5305-01-266-8341, or NIIN 012668341, (screw,assembled washer) was assigned October 31, 1987 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are no manufacturer part numbers associated to this NSN. ISO Group has several sources of supply for this NSN.

This part number has not been procured by the US Government in over a year. There have been 5 contracts issued for this part number, with 5 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 4 different suppliers. The last contract numbers awarded were: SPE4A621V154W, SPE5E214MQA20, SPM5A110V0932, SPM5A110V0932, SPM5AY10MM072. The total value of the awarded contracts has been US$ 2,436.63.

This NSN is fairly common among different weapons systems, belonging to 11 different platforms.

There has been a small amount of 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 Jan 08, 2014, 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 5305012668341 does not contain precious metals.

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 Jun 01, 2025.

Technical Characteristics

MATERIAL: (MATT) STEEL COMP 301 PRIMARY WASHER OR STEEL COMP 302 PRIMARY WASHER OR STEEL COMP 302B PRIMARY WASHER OR STEEL COMP 303 PRIMARY WASHER OR STEEL COMP 303SE PRIMARY WASHER OR STEEL COMP 304 PRIMARY WASHER OR STEEL COMP 304L PRIMARY WASHER OR STEEL COMP 305 PRIMARY WASHER OR STEEL COMP 308 PRIMARY WASHER OR STEEL COMP 309 PRIMARY WASHER OR STEEL COMP 309S PRIMARY WASHER OR STEEL COMP 310 PRIMARY WASHER OR STEEL COMP 310S PRIMARY WASHER OR STEEL COMP 314 PRIMARY WASHER OR STEEL COMP 316 PRIMARY WASHER OR STEEL COMP 316L PRIMARY WASHER OR STEEL COMP 317 PRIMARY WASHER OR STEEL COMP 321 PRIMARY WASHER OR STEEL COMP 347 PRIMARY WASHER OR STEEL COMP 348 PRIMARY WASHER OR STEEL COMP 384 PRIMARY WASHER OR STEEL COMP 385 PRIMARY WASHER
MATERIAL: (MATT) STEEL COMP 302 FASTENER OR STEEL COMP 304 FASTENER
MATERIAL: (MATT) STEEL COMP 302 SECONDARY WASHER OR STEEL COMP 304 SECONDARY WASHER
FASTENER LENGTH: (AASB) 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
HEAD DIAMETER: (AASL) 0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM
HEAD HEIGHT: (AASU) 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM
HEAD STYLE: (AASK) PAN
INTERNAL DRIVE STYLE: (ABQZ) CROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) 66 FED STD ALL MATERIAL RESPONSES PRIMARY WASHER
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES SECONDARY WASHER
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) QQ-S-763 FED SPEC ALL MATERIAL RESPONSES FASTENER
MATERIAL: (MATT) STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385 PRIMARY WASHER
MATERIAL: (MATT) STEEL COMP 302 OR STEEL COMP 304 FASTENER
MATERIAL: (MATT) STEEL COMP 302 OR STEEL COMP 304 SECONDARY WASHER
NOMINAL THREAD DIAMETER: (AHYM) 0.164 INCHES
PRIMARY WASHER MATERIAL THICKNESS: (CTJJ) 0.040 INCHES MINIMUM
PRIMARY WASHER OUTSIDE DIAMETER: (CSPG) 0.293 INCHES MAXIMUM
PRIMARY WASHER STYLE: (CTHW) SPLIT HELICAL RING
SECONDARY WASHER MATERIAL THICKNESS: (CWBW) 0.013 INCHES MINIMUM AND 0.019 INCHES MAXIMUM
SECONDARY WASHER OUTSIDE DIAMETER: (CTDQ) 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM
SECONDARY WASHER STYLE: (CRYT) FLAT
SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER: (CRGX) NOT IDENTICAL
SPECIFICATION/STANDARD DATA: (ZZZK) 80205-NAS1301 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
WASHER QUANTITY: (AAVW) 2
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT: (SFTT) PASSIVATE OVERALL
THREAD CLASS: (AAJD) 2A
THREAD LENGTH: (AASA) 0.264 INCHES MINIMUM
THREAD DIRECTION: (AAJF) RIGHT-HAND
THREAD QUANTITY PER INCH: (CMLP) 32
THREAD SERIES DESIGNATOR: (THSD) UNC