The Seat,valve, cataloged under National Stock Number 4810-01-150-4903, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4810-01-150-4903 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Status | ACTIVE |
| Thread Length | 0.438 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | PLAIN THREADED |
| Body Inside Diameter | 4.890 INCHES NOMINAL IN |
| Nominal Thread Size | 5.875 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 12 SINGLE THREADED PORTION |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | UN 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 |
|---|---|
| SP-NB25025-HH325 | D/9 Drawing number reference only Pima Valve, Llc |
| SP-NB25025-HH325-18 | 3/9 Design control — primary reference Pima Valve, Llc |
| SP-NB25025-HH325-18 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
NSN 4810-01-150-4903 is a Seat,valve, classified under FSC 4810, Valves, Powered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4810-01-150-4954. Verify interchangeability with system specifications before substitution.
Key specifications for 4810-01-150-4903: Overall Height: 0.725 INCHES NOMINAL IN; Thread Length: 0.438 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: PLAIN THREADED; Body Inside Diameter: 4.890 INCHES NOMINAL IN. 9 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.