The Valve,safety Relief, cataloged under National Stock Number 4820-01-104-3970, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-104-3970 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Valve Size | 1.000 INCHES IN |
| Departure From Cited Document | AS MODIFIED BY MAXIMUM OPERATING PRESSURE AND MEDIA FOR WHICH DESIGNED AND VALVE SIZE |
| Nondefinitive Spec/std Data | B GRADE |
| 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 |
|---|---|
| MIL-V-24332 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-24332 | 4/1 Identification reference U.S. Government activity |
NSN 4820-01-104-3970 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-104-3970: Valve Size: 1.000 INCHES IN; Departure From Cited Document: AS MODIFIED BY MAXIMUM OPERATING PRESSURE AND MEDIA FOR WHICH DESIGNED AND VALVE SIZE; Nondefinitive Spec/std Data: B GRADE. 3 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.