The Seat,valve, cataloged under National Stock Number 4820-01-211-5212, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-211-5212 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Body Outside Diameter | 11.990 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 10.375 INCHES NOMINAL IN |
| Seat Radius | 8.000 INCHES MINIMUM AND 8.004 INCHES MAXIMUM IN |
| Material | PLASTIC POLYAMIDE NYLON SEAT |
| Seating Surface Shape | RADIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 803-4444600 PC 23 | 3/2 Design control — primary reference U.S. Government activity |
| 803-4444600 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-211-5212 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4320-01-280-5288. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-211-5212: Overall Height: 1.324 INCHES MINIMUM AND 1.326 INCHES MAXIMUM IN; Body Outside Diameter: 11.990 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 10.375 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.
NSN 4820-01-211-5212 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.