NSN 6635-00-018-5831, 6635000185831
TRANSDUCER,ULTRASONIC

Federal Supply Classification: FSC 6635 - Physical Properties Testing and Inspection
National Item Identification Number: NIIN 000185831
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 6635-00-018-5831

National Stock Number (NSN) 6635-00-018-5831, or NIIN 000185831, (transducer,ultrasonic) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There are 8 manufacturer part numbers associated with this NSN. 5 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 9 suppliers. Today, 5 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts.

This part number has not been procured by the US Government in over a year. There have been 11 contracts issued for this part number, with 11 awards given. There is moderate competition for this NSN. The US Government has awarded contracts to 6 different suppliers. The last contract numbers awarded were: SPE4A623PH417, SPE4A620V096C, SPE4A619PL017, SPE4A019V0528, SPE4A615V4178. The total value of the awarded contracts has been US$ 10,915.11.

This NSN is somewhat common among different platforms, belonging to 2 different weapons systems.

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 Apr 25, 2008, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The annual buy value of this part falls below the screening threshold of $10,000 but it has been screened for known source(s). (NOTE: This code shall not be used when screening parts entering the inventory. It shall not be assigned in preference to or supersede any other AMSC.) Valid AMCs: 1, 2, 3, 4 and 5.

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 6635000185831 contains an unknown precious metal.

This information was last updated on Aug 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) CMINIATURE CERAMIC W/MICRODOT SIDE CONNECTOR; 5.0 MHZ FREQ; 0.250 IN. BY 0.250 IN. ELEMENT SIZE; 90 DEG ANGLE BEAM; SOUND PROPAGATION IN STEEL AND ALUMINUM; 0.690 IN. LG; 0.590 IN. W; 0.330 IN. DP
GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) MINIATURE CERAMIC W/MICRODOT SIDE CONNECTOR; 5.0 MHZ FREQ; 0.250 IN. BY 0.250 IN. ELEMENT SIZE; 90 DEG ANGLE BEAM; SOUND PROPAGATION IN STEEL AND ALUMINUM; 0.690 IN. LG; 0.590 IN. W; 0.330 IN. DP