The Seat,valve, cataloged under National Stock Number 4820-01-421-4641, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-421-4641 |
| Primary Part Number | 15-3-0400-6 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Material Document and Classification | QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material | NICKEL ALLOY SEAT |
| 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 |
|---|---|
| 15-3-0400-6 PRIMARY | Hunt Valve Company, Inc. (USA) |
| 15-3 PART 6 4.00IN | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 15-3 PART 6 4.00IN | 5/9 Secondary reference Pima Valve, Llc |
| 15-3-0400-6 | 3/9 Design control — primary reference Pima Valve, Llc |
NSN 4820-01-421-4641 is a Seat,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-4641 has 2 manufacturer part numbers on file: 15-3-0400-6 (Hunt Valve Company, Inc.), 15-3 PART 6 4.00IN (Hunt Valve Company, Inc.).
Key specifications for 15-3-0400-6: Material Document and Classification: QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE SEAT; Special Features: FOR 4 IN. STOP CHECK VALVE IN; End Item Identification: OSPREY CLASS MHC; Material: NICKEL ALLOY SEAT. 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.