The Valve Assembly, cataloged under National Stock Number 4820-01-508-6521, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Carver Pump Company. Government technical data includes 2 specifications, 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 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 | 4820-01-508-6521 |
| Primary Part Number | 250-1100001 |
| Item Name | Valve Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Valve Quantity | 2 |
| Body 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 |
|---|---|
| 250-1100001 PRIMARY | Carver Pump Company (USA) |
| 250-1100-0-01 REV 4 | Carver Pump Company (USA) |
NSN 4820-01-508-6521 is a Valve Assembly, manufactured by Carver Pump Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-508-6521 has 2 manufacturer part numbers on file: 250-1100001 (Carver Pump Company), 250-1100-0-01 REV 4 (Carver Pump Company).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-508-8771. Verify interchangeability with system specifications before substitution.
Key specifications for 250-1100001: Valve Quantity: 2; Body Material: COPPER ALLOY; Special Features: ASSEMBLY CONSISTS OF: HOSE ADAPTOR, NI-CU ALLOY, 535-916-02-320 1PC.; HOSE, MONEL-RUBBER, 499-0916-01 1PC.; HOSE ADAPTOR, NI-CU ALLOY, 533-00-0007-320 1PC.; SHUT-OFF VALVE, NI-CU ALLOY, 578-43S6BKB-320 1PC.; TUBE ADAPTOR, NI-CU ALLOY, 533-00-0002-320 1PC.; GASKET, SYNTHETIC FIBER, 073-01-01-422 1PC.; AIR RELEASE VALVE, BRONZE, 580-04-250 1PC.; BOLT, NI-CU ALLOY, 800-0500-18-320 4PCS.; NUT, NI-CU ALLOY, 830-0500-320 4PCS.; O-RING, VITON, 700-904-4330 2PCS.; O-RING, VITON, 700-906-4330 1PC.; FLANGE, SILICONE BRONZE, 516-100-00-276 1PC.; STEEL BRACKET IS SUPPLIED BY CUSTOMER; End Item Identification: PUMP VALVE ASSEMBLY. 2 specifications are 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.