The Seat,valve, cataloged under National Stock Number 4820-00-175-1981, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-175-1981 |
| Primary Part Number | 346554PC4 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Length | 0.053 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | PLAIN THREADED |
| Material Document and Classification | QQ-B-611-B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.375 INCHES NOMINAL IN |
| Nominal Thread Size | 0.562 INCHES SINGLE THREADED PORTION IN |
| Seat Radius | 0.005 INCHES NOMINAL IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Material | COPPER ALLOY OVERALL |
| Seat Angle in Deg | 5.000 MINIMUM AND 30.000 MAXIMUM |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 346554PC4 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 4820-00-175-1981 is a Seat,valve, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-175-1981 has 1 manufacturer part number on file: 346554PC4 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 346554PC4: Overall Height: 0.100 INCHES NOMINAL IN; Thread Length: 0.053 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: PLAIN THREADED; Material Document and Classification: QQ-B-611-B FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 11 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.