The Valve,safety Relief, cataloged under National Stock Number 4820-01-283-3298, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Esi Acquisition Corp Dba Esi Acquisition Corp. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (CAGE 09790); Esi Acquisition Corp Dba Esi Acquisition Corp (CAGE 3EHZ0) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-283-3298 |
| Primary Part Number | 74550-1 MOD 1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Esi Acquisition Corp Dba Esi Acquisition Corp |
| 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 |
|---|---|
| 74550 ASSY 74550-1 | Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA) |
| 74550-1 MOD 1 PRIMARY | Esi Acquisition Corp Dba Esi Acquisition Corp (USA) |
| Reference | Meaning |
|---|---|
| 74550-1 MOD 1 | 5/9 Secondary reference Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator |
NSN 4820-01-283-3298 is a Valve,safety Relief, manufactured by Esi Acquisition Corp Dba Esi Acquisition Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-283-3298 has 2 manufacturer part numbers on file: 74550 ASSY 74550-1 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator), 74550-1 MOD 1 (Esi Acquisition Corp Dba Esi Acquisition Corp).
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.