The Seat,valve, cataloged under National Stock Number 4820-01-275-9137, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-275-9137 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Body Outside Diameter | 5.628 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 4.500 INCHES NOMINAL IN |
| Material | STEEL 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 |
| Reference | Meaning |
|---|---|
| 1S-692-5-5 | 3/2 Design control — primary reference U.S. Government activity |
| 1S692 ITEM 5 | 5/2 Secondary reference U.S. Government activity |
| 1S692 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-275-9137 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-275-9137: Overall Height: 1.526 INCHES MINIMUM AND 1.963 INCHES MAXIMUM IN; Body Outside Diameter: 5.628 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 4.500 INCHES NOMINAL IN. 5 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.