The Seat,valve, cataloged under National Stock Number 4820-01-110-0144, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-110-0144 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Material Document and Classification | QQ-N-288,COMP B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 6.750 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 12 SINGLE THREADED PORTION |
| Material | NICKEL ALLOY OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Thread Series Designator | UNS 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 |
| Reference | Meaning |
|---|---|
| 803-1385541-05X-04 | 3/2 Design control — primary reference U.S. Government activity |
| 803-1385541 | D/9 Drawing number reference only U.S. Government activity |
| 803-1385541 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 803-1385541-051-04 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-110-0144 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-157-6395. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-110-0144: Overall Height: 1.500 INCHES NOMINAL IN; Material Document and Classification: QQ-N-288,COMP B FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Size: 6.750 INCHES SINGLE THREADED PORTION IN; Thread Class: 2A SINGLE THREADED PORTION A. 8 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.