The Cartridge,shut-Off Valve, cataloged under National Stock Number 4820-01-503-5990, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-503-5990 |
| Primary Part Number | 8081510070 |
| Item Name | Cartridge,shut-Off Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc |
| Status | ACTIVE |
| Material | COPPER ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PL7326194-002 | Naval Sea Systems Command (USA) |
| 8081510070 PRIMARY | Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc (USA) |
| Reference | Meaning |
|---|---|
| PL7326194 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-503-5990 is a Cartridge,shut-Off Valve, manufactured by Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-503-5990 has 2 manufacturer part numbers on file: PL7326194-002 (Naval Sea Systems Command), 8081510070 (Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-507-0473. Verify interchangeability with system specifications before substitution.
Key specifications for 8081510070: Special Features: BRASS WITH NICKEL PLATE; NEXT HIGHER ASSEMBLY 7326194-1, FILL/DRAIN VALVE; MEDIUM: REFRIGERANT R-134A A; End Item Identification: ASDS; Material: COPPER ALLOY. 1 specification is documented in the U.S. Government catalog.
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.