The Seat,valve, cataloged under National Stock Number 4820-01-577-8673, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-577-8673 |
| Primary Part Number | B3620A-3IN PC 6 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Material Document and Classification | ASTM A494,GR -30H ASSN STD SINGLE MATERIAL RESPONSE 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 |
|---|---|
| 57-005 3.0IN PT. NO. 6 | Hunt Valve Company, Inc. (USA) |
| B3620A-3IN PC 6 PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 57-005 3.0IN PT. NO. 6 | 5/9 Secondary reference Pima Valve, Llc |
| B3620A-3IN PC 6 | 3/9 Design control — primary reference Pima Valve, Llc |
NSN 4820-01-577-8673 is a Seat,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-577-8673 has 2 manufacturer part numbers on file: 57-005 3.0IN PT. NO. 6 (Hunt Valve Company, Inc.), B3620A-3IN PC 6 (Hunt Valve Company, Inc.).
Key specifications for B3620A-3IN PC 6: Material Document and Classification: ASTM A494,GR -30H ASSN STD SINGLE MATERIAL RESPONSE SEAT; Part Name Assigned by Controlling Agency: SEAT,VALVE; End Item Identification: DDG1000. 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.