The Valve,butterfly, cataloged under National Stock Number 4820-01-370-9759, 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. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-370-9759 |
| Primary Part Number | 74491-4 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Esi Acquisition Corp Dba Esi Acquisition Corp |
| Status | ACTIVE |
| Supplementary Features | COGNIZANT SERVICE - ROYAL AUSTRALIAN NAVY |
| 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 |
|---|---|
| 74491-4 PRIMARY | Esi Acquisition Corp Dba Esi Acquisition Corp (USA) |
| 74491-4 PRIMARY | Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA) |
| Reference | Meaning |
|---|---|
| 74491-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-370-9759 is a Valve,butterfly, manufactured by Esi Acquisition Corp Dba Esi Acquisition Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-370-9759 has 2 manufacturer part numbers on file: 74491-4 (Esi Acquisition Corp Dba Esi Acquisition Corp), 74491-4 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator).
Key specifications for 74491-4: Supplementary Features: COGNIZANT SERVICE - ROYAL AUSTRALIAN NAVY; End Item Identification: FFG GUIDED MISSILE FRIGATE. 1 specification is 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.