The Retainer,disk,valve, cataloged under National Stock Number 4820-01-539-7534, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-539-7534 |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Valve Model Number for Which Designed | GLOBE VALVE (STOP) 1-1/4 AND 1-1/2" |
| Outside Diameter | 1.313 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-281 CL A OR B FED SPEC SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 1.250 INCHES IN |
| Inside Diameter | 0.503 INCHES NOMINAL IN |
| Valve Design Control Activity | 80064 |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 803-2177934-X7XX-13 | 5/2 Secondary reference U.S. Government activity |
| 803-2177934-X6XX-13 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-539-7534 is a Retainer,disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-539-7534: Valve Model Number for Which Designed: GLOBE VALVE (STOP) 1-1/4 AND 1-1/2"; Outside Diameter: 1.313 INCHES NOMINAL IN; Material Document and Classification: QQ-N-281 CL A OR B FED SPEC SINGLE MATERIAL RESPONSE; Valve Size for Which Designed: 1.250 INCHES IN. 7 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.