The Seat,valve, cataloged under National Stock Number 4820-00-767-7209, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-767-7209 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.812 INCHES NOMINAL IN |
| Flange Diameter | 5.377 INCHES MINIMUM AND 5.378 INCHES MAXIMUM IN |
| Body Outside Diameter | 4.499 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN |
| Taper Minor Diameter | 3.381 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | MIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE |
| Material Document and Classification | ASTM A182,GRADE F12 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Taper Major Diameter | 5.062 INCHES NOMINAL IN |
| Body Inside Diameter | 3.250 INCHES NOMINAL IN |
| Taper Length | 0.625 INCHES NOMINAL IN |
| Seat Radius | 1.000 INCHES NOMINAL IN |
| Under Flange Height | 1.188 INCHES NOMINAL IN |
| Material | STEEL BODY |
| Material | COBALT ALLOY FACE |
| Seating Surface Shape | RADIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| NL0258- | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| NL258-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-00-767-7209 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-767-7209: Flange Seat to Disk End Height: 0.812 INCHES NOMINAL IN; Flange Diameter: 5.377 INCHES MINIMUM AND 5.378 INCHES MAXIMUM IN; Body Outside Diameter: 4.499 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN; Taper Minor Diameter: 3.381 INCHES NOMINAL IN. 15 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.