The Seat,valve, cataloged under National Stock Number 4820-00-838-9299, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-838-9299 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Body Outside Diameter | 0.813 INCHES NOMINAL IN |
| Body Stepped Inside Diameter | 0.378 INCHES NOMINAL FIRST STEP IN |
| Body Stepped Inside Diameter | 0.630 INCHES NOMINAL SECOND STEP IN |
| Style Designator | PLAIN |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Seat Angle in Deg | 45.000 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 |
| Reference | Meaning |
|---|---|
| D60249-204 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-838-9299 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-838-9299: Overall Height: 0.190 INCHES NOMINAL IN; Body Outside Diameter: 0.813 INCHES NOMINAL IN; Body Stepped Inside Diameter: 0.378 INCHES NOMINAL FIRST STEP IN; Body Stepped Inside Diameter: 0.630 INCHES NOMINAL SECOND STEP IN. 7 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.