NSN 5310-00-167-0856, 5310001670856
WASHER,LOCK

Federal Supply Classification: FSC 5310 - Nuts and Washers
National Item Identification Number: NIIN 001670856
Codification Country: United States
Item Name Code: INC 14218
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 5310-00-167-0856

National Stock Number (NSN) 5310-00-167-0856, or NIIN 001670856, (washer,lock) 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 5 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 2 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. ISO Group has several sources of supply for this NSN.

This part number has not been procured by the US Government in over 5 years.

This NSN is unique to one weapons system.

This NSN is assigned to Item Name Code (INC) 14218. [A WASHER, USUALLY ROUND, WITH A CENTRALLY-LOCATED HOLE. ITS EDGES AND TWO BEARING SURFACES ARE DESIGNED IN SUCH A WAY THAT APPLIED PRESSURE BRINGS INTO PLAY THE SPRING TENSION AND/OR FRICTIONAL LOCKING PRINCIPLE THAT MATERIALLY RESISTS ANY TENDENCY TOWARD TURNING. IT MAY BE MADE OF ONE OR TWO PIECES.]. 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 5310001670856 contains an unknown precious metal.

This information was last updated on Jul 01, 2025.

Technical Characteristics

DEPARTURE FROM CITED DESIGNATOR: (ZZZX) AS MOD BY SURFACE TREATMENT
HARDNESS RATING: (CQFM) 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
HOLE DIAMETER: (AAUB) 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM
OUTSIDE DIAMETER: (ABKV) 0.460 INCHES MINIMUM AND 0.478 INCHES MAXIMUM
MATERIAL THICKNESS: (ABPX) 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM
NONDEFINITIVE SPEC/STD DATA: (ZZZT) 1 TYPE AND A GRADE AND 1 STYLE AND 3 COMPOSITION
STYLE DESIGNATOR: (STYL) FLAT INTERNAL TEETH
TEST DATA DOCUMENT: (TEST) 81348-FFW100 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).