The Seat,valve, cataloged under National Stock Number 4810-01-072-6639, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-072-6639 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Status | ACTIVE |
| Flange Diameter | 0.375 INCHES NOMINAL IN |
| Thread Length | 0.536 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Body Stepped Inside Diameter | 0.095 INCHES NOMINAL FIRST STEP IN |
| Body Stepped Inside Diameter | 0.187 INCHES NOMINAL SECOND STEP IN |
| Nominal Thread Size | 0.250 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 27 SINGLE THREADED PORTION |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNS SINGLE THREADED PORTION |
| Seating Surface Shape | FLAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1169-14 | 3/9 Design control — primary reference Goodrich Control Systems Ltd T/a Goodrich Engine Control Systems |
NSN 4810-01-072-6639 is a Seat,valve, classified under FSC 4810, Valves, Powered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-650-2371. Verify interchangeability with system specifications before substitution.
Key specifications for 4810-01-072-6639: Flange Diameter: 0.375 INCHES NOMINAL IN; Overall Height: 1.250 INCHES NOMINAL IN; Thread Length: 0.536 INCHES NOMINAL SINGLE THREADED PORTION IN; Body Stepped Inside Diameter: 0.095 INCHES NOMINAL FIRST STEP IN. 10 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.