The Valve,safety Relief, cataloged under National Stock Number 4820-01-687-3367, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fisher George Signet Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-687-3367 |
| Primary Part Number | 161 586 205 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fisher George Signet Inc |
| Status | ACTIVE |
| Flow Control Device | PISTON |
| Flange Shape | ROUND ALL ENDS |
| Nominal Length | 254.0 MILLIMETERS ALL ENDS MM |
| Connection Type | THREADED CARTRIDGE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.25 INCHES IN |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Facility | THREADED FASTENER |
| Bolt Hole Quantity | 1 ALL ENDS |
| Nominal Width | 204.0 MILLIMETERS ALL ENDS MM |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Material | PLASTIC BODY |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 161 586 205 PRIMARY | Fisher George Signet Inc (USA) |
NSN 4820-01-687-3367 is a Valve,safety Relief, manufactured by Fisher George Signet Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-687-3367 has 1 manufacturer part number on file: 161 586 205 (Fisher George Signet Inc).
Key specifications for 161 586 205: Flow Control Device: PISTON; Flange Shape: ROUND ALL ENDS; Nominal Length: 254.0 MILLIMETERS ALL ENDS MM; Connection Type: THREADED CARTRIDGE ALL ENDS. 14 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.