The Disk,valve, cataloged under National Stock Number 4820-01-121-6458, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grove Valve Operations. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4820-01-121-6458 |
| Primary Part Number | 145-00319 ITEM 30 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grove Valve Operations |
| Status | ACTIVE |
| Shank Diameter | 0.434 INCHES NOMINAL IN |
| Outside Diameter | 0.480 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Inside Diameter | 0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| W-202H-A24-3 PART 145-00319 | Grove Valve Operations (USA) |
| W-202B-A20 PART 145-00319 | Grove Valve Operations (USA) |
| 145-00319 ITEM 30 PRIMARY | Grove Valve Operations (USA) |
| 145-00319 | Grove Valve Operations (USA) |
| W-202H-A24-1 ITEM 30 | Grove Valve Operations (USA) |
| W-202H-A25-2 ITEM 30 | Grove Valve Operations (USA) |
NSN 4820-01-121-6458 is a Disk,valve, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-121-6458 has 6 manufacturer part numbers on file: W-202H-A24-3 PART 145-00319 (Grove Valve Operations), W-202B-A20 PART 145-00319 (Grove Valve Operations), 145-00319 ITEM 30 (Grove Valve Operations), 145-00319 (Grove Valve Operations), W-202H-A24-1 ITEM 30 (Grove Valve Operations) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-250-4557. Verify interchangeability with system specifications before substitution.
Key specifications for 145-00319 ITEM 30: Shank Diameter: 0.434 INCHES NOMINAL IN; Overall Height: 2.000 INCHES NOMINAL IN; Outside Diameter: 0.480 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Seat Angle: 45.0 DEGREES NOMINAL. 5 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.