NSN 4320-00-398-8755, 4320003988755
TAPPET,PUMP

Federal Supply Classification: FSC 4320 - Power and Hand Pumps
National Item Identification Number: NIIN 003988755
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.

Availability: Readily Available Qualified Suppliers: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 4320-00-398-8755

National Stock Number (NSN) 4320-00-398-8755, or NIIN 003988755, (tappet,pump) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There are 16 manufacturer part numbers associated with this NSN. 15 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, one supplier is listed as an Active supplier 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.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 02, 2005, 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 4320003988755 contains an unknown precious metal.

This information was last updated on Jul 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) 5STEEL,SAE 1115,5.000 IN. LG,1.500 IN. H,0.844 IN. THK. 0.187 IN. COUNTERSUNK HOLE 0.500 IN. C TO C ALONG THE LG,0.630 IN. BORE DIA THROUGH ITEM ALONG THE LG 0.500 C TO C ON THE H,1 BORE DRILLED CENTER HOLE 0.750 IN. 2.500 IN. C TO C ALONG THE LG
GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) STEEL,SAE 1115,5.000 IN. LG,1.500 IN. H,0.844 IN. THK. 0.187 IN. COUNTERSUNK HOLE 0.500 IN. C TO C ALONG THE LG,0.630 IN. BORE DIA THROUGH ITEM ALONG THE LG 0.500 C TO C ON THE H,1 BORE DRILLED CENTER HOLE 0.750 IN. 2.500 IN. C TO C ALONG THE LG