The Seat,valve, cataloged under National Stock Number 4820-01-175-5170, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mission Systems Orchard Park Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Seat,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Mission Systems Orchard Park Inc (CAGE 04577) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-175-5170 |
| Primary Part Number | 2850-0031-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 2850-0031-1 PRIMARY | Mission Systems Orchard Park Inc (USA) |
| Reference | Meaning |
|---|---|
| 2850-0031-1 | 3/9 Design control — primary reference Carleton Technologies Inc Div Tampa Facility |
| 2850-0020-9 | D/9 Drawing number reference only Mission Systems Orchard Park Inc |
| 2850-0020-9 ITEM 20 | 5/9 Secondary reference Mission Systems Orchard Park Inc |
NSN 4820-01-175-5170 is a Seat,valve, manufactured by Mission Systems Orchard Park Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-175-5170 has 1 manufacturer part number on file: 2850-0031-1 (Mission Systems Orchard Park Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-320-2145. Verify interchangeability with system specifications before substitution.
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.