The Disk,valve, cataloged under National Stock Number 4820-01-172-8280, 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6 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-172-8280 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shank Diameter | 2.000 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 3.875 INCHES NOMINAL IN |
| Pressure Rating | 100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Outside Diameter | 5.312 INCHES NOMINAL IN |
| Style Designator | SWING CHECK |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 208-4325303 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 6553-255 PIECE 6 | 3/2 Design control — primary reference U.S. Government activity |
| 6553-255 PIECE 6 | 5/9 Secondary reference Derbyshire Machine & Tool Co |
| 6553-255 PIECE 6 | 5/9 Secondary reference Tate Andale, Llc |
| 6553-255 PIECE 6 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-172-8280 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-172-8280: Shank Diameter: 2.000 INCHES NOMINAL IN; Flange Seat to Disk End Height: 3.875 INCHES NOMINAL IN; Pressure Rating: 100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Outside Diameter: 5.312 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 4820-01-172-8280 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.