The Disk,valve, cataloged under National Stock Number 4820-01-451-1871, 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 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-451-1871 |
| Primary Part Number | 1-B1221E-7D 1N |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Material Document and Classification | ASTM B61 NATIONAL SPEC SINGLE MATERIAL RESPONSE |
| Material | COPPER ALLOY 922 |
| 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 |
|---|---|
| 1-B1221E-7D 1N PRIMARY | Hunt Valve Company, Inc. (USA) |
| 1-B1221E-7D 1IN PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1-B1221E-7D 1N | 5/9 Secondary reference Pima Valve, Llc |
| 1-B1221E-7D | C/1 Advisory reference — outside the item-of-supply concept Pima Valve, Llc |
| 1-B1221E-7D 1IN | 5/9 Secondary reference Pima Valve, Llc |
NSN 4820-01-451-1871 is a Disk,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-451-1871 has 2 manufacturer part numbers on file: 1-B1221E-7D 1N (Hunt Valve Company, Inc.), 1-B1221E-7D 1IN (Hunt Valve Company, Inc.).
Key specifications for 1-B1221E-7D 1N: Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Material Document and Classification: ASTM B61 NATIONAL SPEC SINGLE MATERIAL RESPONSE; End Item Identification: 1 IN. GLOBE STOP CHECK VALVE, PIMA VALVE INC, P/N B1221E-1IN IN; Material: COPPER ALLOY 922. 3 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.