The Seat,valve, cataloged under National Stock Number 4820-00-336-9276, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-336-9276 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Thread Length | 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | PLAIN THREADED |
| Body Inside Diameter | 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Nominal Thread Size | 1.125 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Material | NICKEL ALLOY OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Thread Series Designator | UNEF 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 |
|---|---|
| 84033 | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| DD445S4101-277PC4 | D/9 Drawing number reference only U.S. Government activity |
| 84033 | 3/9 Design control — primary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| R6215DDPC4 | 5/9 Secondary reference General Electric Company |
| DD445S4101-277PC4 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-00-336-9276 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 5315-01-067-8428, 5962-01-263-9888, 5962-01-264-1987. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-336-9276: Overall Height: 0.938 INCHES NOMINAL IN; Thread Length: 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: PLAIN THREADED; Body Inside Diameter: 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM 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.