The Disk,valve, cataloged under National Stock Number 4820-01-554-8319, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-554-8319 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shoulder Width | 0.080 INCHES MAXIMUM IN |
| Shoulder Height | 0.400 INCHES NOMINAL IN |
| Outside Diameter | 1.069 INCHES MINIMUM IN |
| Style Designator | PLUG |
| Material Document and Classification | ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE |
| Seat Radius | 0.031 INCHES MAXIMUM IN |
| Media for Which Designed | STEAM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | CARBON AND STEEL |
| Thread Series Designator | UN |
| 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 |
|---|---|
| 803-2177525-C5XX-77 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-554-8319 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-554-8319: Overall Height: 1.060 INCHES NOMINAL IN; Shoulder Width: 0.080 INCHES MAXIMUM IN; Shoulder Height: 0.400 INCHES NOMINAL IN; Outside Diameter: 1.069 INCHES MINIMUM IN. 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.