The Valve,stop-Check, cataloged under National Stock Number 4820-01-321-1788, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-321-1788 |
| Primary Part Number | N-NB252251-SP ITEM 057 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Valve Size | 8.000 INCHES IN |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| NB252251E-S ITEM 057 8IN | Hunt Valve Company, Inc. (USA) |
| N-NB252251-SP ITEM 057 PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| N-NB252251-SP ITEM 057 | 3/9 Design control — primary reference Pima Valve, Llc |
| NB252251E-S ITEM 057 8IN | 5/9 Secondary reference Pima Valve, Llc |
NSN 4820-01-321-1788 is a Valve,stop-Check, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-321-1788 has 2 manufacturer part numbers on file: NB252251E-S ITEM 057 8IN (Hunt Valve Company, Inc.), N-NB252251-SP ITEM 057 (Hunt Valve Company, Inc.).
Key specifications for N-NB252251-SP ITEM 057: Valve Size: 8.000 INCHES IN; Material: COPPER ALLOY BODY. 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.