The Seat,valve, cataloged under National Stock Number 4820-00-036-1950, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 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 | 4820-00-036-1950 |
| Primary Part Number | 83882 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.470 INCHES NOMINAL IN |
| Flange Diameter | 2.250 INCHES NOMINAL IN |
| Body Outside Diameter | 1.904 INCHES NOMINAL IN |
| Thread Length | 0.230 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 1.375 INCHES NOMINAL IN |
| Nominal Thread Size | 2.250 INCHES SINGLE THREADED PORTION IN |
| Surface Treatment | OXIDE OVERALL |
| Under Flange Height | 0.965 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 18 SINGLE THREADED PORTION |
| Material | STEEL OVERALL |
| Seat Angle in Deg | 43.717 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 |
| Part Number | Manufacturer |
|---|---|
| 83882 PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-036-1950 is a Seat,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-036-1950 has 1 manufacturer part number on file: 83882 (Ashcroft Inc Dba Heise).
3 possible matches (shared part number, not a government interchangeability claim): 5360-00-115-3784, 2810-00-119-0053, 6685-00-887-3435. Verify interchangeability with system specifications before substitution.
Key specifications for 83882: Flange Seat to Disk End Height: 0.470 INCHES NOMINAL IN; Flange Diameter: 2.250 INCHES NOMINAL IN; Body Outside Diameter: 1.904 INCHES NOMINAL IN; Thread Length: 0.230 INCHES NOMINAL SINGLE THREADED PORTION IN. 15 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.