The Seat,valve, cataloged under National Stock Number 4820-01-121-2628, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mission Systems Orchard Park Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-121-2628 |
| Primary Part Number | 2850-0097-3 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.072 INCHES NOMINAL IN |
| Flange Diameter | 0.860 INCHES NOMINAL IN |
| Body Outside Diameter | 0.860 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.653 INCHES NOMINAL IN |
| Under Flange Height | 0.140 INCHES NOMINAL IN |
| Material | PLASTIC OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 2850-0097-3 PRIMARY | Mission Systems Orchard Park Inc (USA) |
| Reference | Meaning |
|---|---|
| 2850-0097-3 | 3/9 Design control — primary reference Carleton Technologies Inc Div Tampa Facility |
| PL2850-0030 REVA FIND 26 | 5/9 Secondary reference Mission Systems Orchard Park Inc |
| PL2850-0030-31 FIND 26 | 5/9 Secondary reference Mission Systems Orchard Park Inc |
| 2850-0030 PIECE 26 | 5/9 Secondary reference Mission Systems Orchard Park Inc |
NSN 4820-01-121-2628 is a Seat,valve, manufactured by Mission Systems Orchard Park Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-121-2628 has 1 manufacturer part number on file: 2850-0097-3 (Mission Systems Orchard Park Inc).
Key specifications for 2850-0097-3: Flange Seat to Disk End Height: 0.072 INCHES NOMINAL IN; Flange Diameter: 0.860 INCHES NOMINAL IN; Body Outside Diameter: 0.860 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 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.