The Seat,valve, cataloged under National Stock Number 4820-00-910-7944, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Us Army Aviation and Missile Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-910-7944 |
| Primary Part Number | 9090270-2 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.078 INCHES NOMINAL IN |
| Flange Diameter | 0.621 INCHES NOMINAL IN |
| Body Outside Diameter | 0.343 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.250 INCHES NOMINAL IN |
| Under Flange Height | 0.047 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 9090270-2 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 26707 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-910-7944 is a Seat,valve, manufactured by Us Army Aviation and Missile Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-910-7944 has 1 manufacturer part number on file: 9090270-2 (Us Army Aviation and Missile Command).
4 possible matches (shared part number, not a government interchangeability claim): 5330-01-249-4255, 5365-01-375-2301, 5996-01-561-1367. Verify interchangeability with system specifications before substitution.
Key specifications for 9090270-2: Flange Seat to Disk End Height: 0.078 INCHES NOMINAL IN; Flange Diameter: 0.621 INCHES NOMINAL IN; Body Outside Diameter: 0.343 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.