The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-660-0091, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Watts Regulator Company (CAGE 79227) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-660-0091 |
| Primary Part Number | 0121585 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| 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 |
|---|---|
| 0121585 PRIMARY | Watts Regulator Company (USA) |
| LFN240X 100-210 | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 121755 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-660-0091 is a Valve,relief,pressure and Temper, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-660-0091 has 2 manufacturer part numbers on file: 0121585 (Watts Regulator Company), LFN240X 100-210 (Watts Regulator Company).
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.