The Valve,safety Relief, cataloged under National Stock Number 4820-01-262-9341, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-262-9341 |
| Primary Part Number | 1213E3075FI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | HOSE SOCKET (HOSE) ALL ENDS |
| Nominal Length | 4.525 INCHES ALL ENDS IN |
| Connection Type | THREADED INTERNAL TUBE ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES ALL ENDS IN |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Maximum Operating Temp | -65.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 1.062 INCHES ALL ENDS IN |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL COMP 440C SEAT |
| Material | STEEL COMP 303 BODY |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) ALL ENDS |
| 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 |
|---|---|
| 1213E3075FI PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 0631C0044 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 0631C0044 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 1213E3075FIND51 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| RV57-17 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-262-9341 is a Valve,safety Relief, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-262-9341 has 2 manufacturer part numbers on file: 1213E3075FI (Lockheed Martin Corporation Div Rms), 0631C0044 (Lockheed Martin Corporation Div Rms).
Key specifications for 1213E3075FI: Flow Control Device: POPPET; Connection Style: HOSE SOCKET (HOSE) ALL ENDS; Nominal Length: 4.525 INCHES ALL ENDS IN; Connection Type: THREADED INTERNAL TUBE ALL ENDS. 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.