The Seat,valve, cataloged under National Stock Number 4820-00-045-8494, 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11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-045-8494 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.438 INCHES NOMINAL IN |
| Flange Diameter | 1.125 INCHES NOMINAL IN |
| Body Outside Diameter | 0.562 INCHES NOMINAL IN |
| Seal Accommodation Type | RECESSED |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.188 INCHES NOMINAL IN |
| Under Flange Height | 0.125 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY THE CLEANING REQUIREMENT |
| 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 |
|---|---|
| 0X234617CP | C/1 Advisory reference — outside the item-of-supply concept Grove Valve Operations |
| 0X234617 | 5/9 Secondary reference Grove Valve Operations |
| 146-00107-1 | 3/1 Design control — primary reference Grove Valve Operations |
NSN 4820-00-045-8494 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-00-715-9437, 4820-01-074-7928. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-045-8494: Flange Seat to Disk End Height: 0.438 INCHES NOMINAL IN; Flange Diameter: 1.125 INCHES NOMINAL IN; Body Outside Diameter: 0.562 INCHES NOMINAL IN; Seal Accommodation Type: RECESSED. 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.