The Valve,safety Relief, cataloged under National Stock Number 4820-01-277-1273, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Isotta Fraschini Motori Spa (CAGE A0106); Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am (CAGE 0VP52) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-277-1273 |
| Primary Part Number | 75184F91 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 75184P91 | Isotta Fraschini Motori Spa (ITA) |
| 75184F91 PRIMARY | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am (USA) |
| Reference | Meaning |
|---|---|
| 75184F91 | 5/9 Secondary reference Isotta Fraschini Motori Spa |
| 75184F91 | 5/9 Secondary reference Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
NSN 4820-01-277-1273 is a Valve,safety Relief, manufactured by Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-277-1273 has 2 manufacturer part numbers on file: 75184P91 (Isotta Fraschini Motori Spa), 75184F91 (Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am).
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.