The Tailpiece,valve, cataloged under National Stock Number 4810-00-489-6257, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Bec Systems Llc Dba Bec Machine Products. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Tailpiece,valve |
| FSC / FSG | 4810 — Valves, Powered (FSG 48) |
| Manufacturers | Bec Systems Llc Dba Bec Machine Products (CAGE 0JC12); Ammcon Corp. (CAGE 6W889); Hamill Manufacturing Company Dba Hamill Manufacturing Co (CAGE 17661); Duhadaway Tool & Die Shop Inc (CAGE 1V517); Nassau Tool Works, Inc (CAGE 2M490) |
| Parameter | Value |
|---|---|
| NSN | 4810-00-489-6257 |
| Primary Part Number | 510946-3 |
| Item Name | Tailpiece,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Bec Systems Llc Dba Bec Machine Products |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 510946-3 | Bec Systems Llc Dba Bec Machine Products (USA) |
| 510946-3 | Ammcon Corp. (USA) |
| 510946-3 | Hamill Manufacturing Company Dba Hamill Manufacturing Co (USA) |
| 510946-3 | Duhadaway Tool & Die Shop Inc (USA) |
| 510946-3 | Nassau Tool Works, Inc (USA) |
| 510946-3 | Pre-Mach Inc (USA) |
| 510946-3 | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| 510946-3 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 510946-3 | 5/9 Secondary reference Computa-Base-Machining, Inc. |
| 510946 | D/9 Drawing number reference only U.S. Government activity |
| 510946-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4810-00-489-6257 is a Tailpiece,valve, manufactured by Bec Systems Llc Dba Bec Machine Products, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-00-489-6257 has 8 manufacturer part numbers on file: 510946-3 (Bec Systems Llc Dba Bec Machine Products), 510946-3 (Ammcon Corp.), 510946-3 (Hamill Manufacturing Company Dba Hamill Manufacturing Co), 510946-3 (Duhadaway Tool & Die Shop Inc), 510946-3 (Nassau Tool Works, Inc) and 3 more.
3 possible matches (shared part number, not a government interchangeability claim): 2930-00-735-2821, 5985-01-353-6194, 4810-01-566-9906. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.