The Seat,valve, cataloged under National Stock Number 4820-00-976-4712, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-976-4712 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.375 INCHES NOMINAL IN |
| Flange Diameter | 2.310 INCHES MINIMUM AND 2.311 INCHES MAXIMUM IN |
| Body Outside Diameter | 2.063 INCHES MINIMUM AND 2.065 INCHES MAXIMUM 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 | QQ-S-763,CLASS 304,COND A FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Body Inside Diameter | 1.186 INCHES MINIMUM AND 1.189 INCHES MAXIMUM IN |
| Under Flange Height | 0.375 INCHES NOMINAL IN |
| Material | STEEL BODY |
| Material | COBALT ALLOY FACE |
| 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 |
|---|---|
| ND-504UPIECE52 | C/1 Advisory reference — outside the item-of-supply concept Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 52ND5047 | C/1 Advisory reference — outside the item-of-supply concept Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| ND5047PC52 | 5/9 Secondary reference U.S. Government activity |
| ND-5047PIECE52 | 3/9 Design control — primary reference U.S. Government activity |
| ND504752 | C/1 Advisory reference — outside the item-of-supply concept Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 717088 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 52ND5047 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-976-4712 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4920-01-013-2681. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-976-4712: Flange Seat to Disk End Height: 0.375 INCHES NOMINAL IN; Flange Diameter: 2.310 INCHES MINIMUM AND 2.311 INCHES MAXIMUM IN; Body Outside Diameter: 2.063 INCHES MINIMUM AND 2.065 INCHES MAXIMUM IN; Style Designator: PLAIN FLANGED. 11 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.