The Seat,valve, cataloged under National Stock Number 4820-01-440-4832, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-440-4832 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Thread Length | 0.620 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | PLAIN |
| Nominal Thread Size | 17.625 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 12 SINGLE THREADED PORTION |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UN SINGLE THREADED PORTION |
| 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 |
|---|---|
| TDCV-016095 | D/9 Drawing number reference only C M Industries Inc Dba Custom Marine Sales |
| TDCV-016095-18-03 | 5/9 Secondary reference C M Industries Inc Dba Custom Marine Sales |
| TDCV-016095-18 PIECE 3 | 3/9 Design control — primary reference C M Industries Inc Dba Custom Marine Sales |
NSN 4820-01-440-4832 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-440-4895. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-440-4832: Thread Length: 0.620 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: PLAIN; Nominal Thread Size: 17.625 INCHES SINGLE THREADED PORTION IN; Special Features: FINAL MACHINING OF SEAT RING IS PERFORMED AFTER SEAT RING IS INSTALLED IN BODY;W/8 0.280 IN. HOLES (1) SIDE,ON A 16.375 IN. BCD IN. 7 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.