The Valve,safety Relief, cataloged under National Stock Number 4820-01-311-7993, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Raytheon Company Dba Raytheon Co. Government technical data includes 10 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-311-7993 |
| Primary Part Number | G124947-2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.125 INCHES ALL ENDS IN |
| Material | STEEL BODY |
| Thread Series Designator | NPTF ALL ENDS |
| Opening Pressure Setting | 20.0 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 |
|---|---|
| G124947-2 | Raytheon Company (USA) |
| G124947-2 PRIMARY | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| G124947 | 7/1 Vendor item drawing reference Raytheon Company Dba Raytheon Co |
| G124947-2 | 5/9 Secondary reference Raytheon Company Div Corp |
| P151-383 | 5/2 Secondary reference U.S. Government activity |
| G124947 | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 4820-01-311-7993 is a Valve,safety Relief, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-311-7993 has 2 manufacturer part numbers on file: G124947-2 (Raytheon Company), G124947-2 (Raytheon Company Dba Raytheon Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-311-7994. Verify interchangeability with system specifications before substitution.
Key specifications for G124947-2: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 10 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.