The Valve,safety Relief, cataloged under National Stock Number 4820-01-647-0169, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rolls-Royce Marine North America Inc.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Rolls-Royce Marine North America Inc. (CAGE 38ZC7); International Valve Corp Dba Check-All Valve Mfg. Co. (CAGE 28396) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-647-0169 |
| Primary Part Number | 23059087-08 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rolls-Royce Marine North America Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 23059087-08 PRIMARY | Rolls-Royce Marine North America Inc. (USA) |
| 23059087-08 | International Valve Corp Dba Check-All Valve Mfg. Co. (USA) |
| Reference | Meaning |
|---|---|
| NMM100011 NO 52 | D/9 Drawing number reference only Bird-Johnson Propeller Company, Llc |
| 23059087-08 | 3/9 Design control — primary reference Rolls-Royce Corporation |
| TFFSSVT5.00SSNF | 5/9 Secondary reference International Valve Corp Dba Check-All Valve Mfg. Co. |
NSN 4820-01-647-0169 is a Valve,safety Relief, manufactured by Rolls-Royce Marine North America Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-647-0169 has 2 manufacturer part numbers on file: 23059087-08 (Rolls-Royce Marine North America Inc.), 23059087-08 (International Valve Corp Dba Check-All Valve Mfg. Co.).
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.