NSN 4820-01-091-2955, 4820010912955
COLLAR,STEM GUIDE

Federal Supply Classification: FSC 4820 - Valves, Nonpowered
National Item Identification Number: NIIN 010912955
Codification Country: United States
Item Name Code: INC 77777
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 4820-01-091-2955

National Stock Number (NSN) 4820-01-091-2955, or NIIN 010912955, (collar,stem guide) was assigned March 5, 1980 in the Federal Logistics Information System (FLIS). 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 5 years, with the most recent procurement date of Feb 24, 2014. There has been one contract issued for this part number, with one award given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE7M514M3800. The total value of the awarded contracts has been US$ 1,016.00.

This NSN is somewhat common among different platforms, belonging to 3 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 Aug 02, 2004, 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) 77777. 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 4820010912955 contains an unknown precious metal.

This information was last updated on May 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) CARBON STEEL,PER ASTM-A-515,GRADE 70; 6.125 IN. O/A LG,1.000 IN. THK,1.625 IN. OUTSIDE RADIUS; 1.845 IN. APERTURE SIZE INCLUDING 0.500 IN. MIN,0.503 IN. MAX KEYWAY W; 1ST END ADAPTED FOR SELF-THD SCREW 0.500 IN. DEEP; 0.562 IN. 1ST END W; APERTURE LOCATED 4.500 IN. FROM 1ST END; THD HOLE LOCATED IN-LINE W/KEYWAY 45.0 DEG ANGLE FROM APERTURE CENTER LINE ON 2ND END; 0.375 IN.-16,UNC,RH THD SIZE; USED W/5 IN. SIZE VALVE