The Valve,safety Relief, cataloged under National Stock Number 4820-01-340-5748, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-340-5748 |
| Primary Part Number | 42593-015 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control |
| Status | ACTIVE |
| Operating Pressure | 2750.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE 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 |
|---|---|
| 42593-015 PRIMARY | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control (USA) |
| Reference | Meaning |
|---|---|
| 643XB-12-8-2 | 5/9 Secondary reference U.S. Government activity |
| 643XB-12-8-2 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
NSN 4820-01-340-5748 is a Valve,safety Relief, manufactured by Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-340-5748 has 1 manufacturer part number on file: 42593-015 (Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control).
Key specifications for 42593-015: Operating Pressure: 2750.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Operation Method: AUTOMATIC. 2 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.