The Seat,valve, cataloged under National Stock Number 4820-01-386-8367, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is O T S I. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-386-8367 |
| Primary Part Number | B48581 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | O T S I |
| Status | ACTIVE |
| Body Outside Diameter | 0.553 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.156 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Seat Angle in Deg | 60.000 NOMINAL |
| 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 |
|---|---|
| B48581 PRIMARY | O T S I (USA) |
NSN 4820-01-386-8367 is a Seat,valve, manufactured by O T S I, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-386-8367 has 1 manufacturer part number on file: B48581 (O T S I).
Key specifications for B48581: Overall Height: 0.187 INCHES NOMINAL IN; Body Outside Diameter: 0.553 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 0.156 INCHES NOMINAL IN. 6 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.