The Tailpiece,valve, cataloged under National Stock Number 4820-01-654-0257, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ssp Fittings Corp. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Tailpiece,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711); Ssp Fittings Corp (CAGE 79926) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-654-0257 |
| Primary Part Number | S4S |
| Item Name | Tailpiece,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ssp Fittings Corp |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-01-654-0257 is a Tailpiece,valve, manufactured by Ssp Fittings Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-654-0257 has 2 manufacturer part numbers on file: 6819748 (Naval Sea Systems Command), S4S (Ssp Fittings Corp).
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.