The Valve,safety Relief, cataloged under National Stock Number 4820-00-485-1968, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cosmodyne, Llc Dba Cosmodyne Llc. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-485-1968 |
| Primary Part Number | 3200745-1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cosmodyne, Llc Dba Cosmodyne Llc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +90.0 TO 110.0 POUNDS PER SQUARE INCH LBS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Maximum Operating Temp | 500.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | -100.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Thread Quantity Per Inch | 18 FIRST END |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | NPT FIRST END |
| Opening Pressure Setting | 100.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 3200745-1 | Cosmodyne, Llc Dba Cosmodyne Llc (USA) |
| Reference | Meaning |
|---|---|
| 520B-2M-100 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-485-1968 is a Valve,safety Relief, manufactured by Cosmodyne, Llc Dba Cosmodyne Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-485-1968 has 1 manufacturer part number on file: 3200745-1 (Cosmodyne, Llc Dba Cosmodyne Llc).
Key specifications for 3200745-1: Flow Control Device: POPPET; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 17 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.