The Valve,butterfly, cataloged under National Stock Number 4820-01-393-0480, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-393-0480 |
| Primary Part Number | 81437-1 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator |
| Status | ACTIVE |
| Valve Size | 4.000 INCHES IN |
| Material | STEEL CORROSION RESISTING BODY |
| 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 |
|---|---|
| 81760 ITEM 1 | Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA) |
| 81437-1 PRIMARY | Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA) |
| Reference | Meaning |
|---|---|
| 81437-1 | 3/2 Design control — primary reference U.S. Government activity |
| 81437-1 | 5/9 Secondary reference Esi Acquisition Corp Dba Esi Acquisition Corp |
NSN 4820-01-393-0480 is a Valve,butterfly, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-393-0480 has 2 manufacturer part numbers on file: 81760 ITEM 1 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator), 81437-1 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator).
Key specifications for 81437-1: Valve Size: 4.000 INCHES IN; Material: STEEL CORROSION RESISTING BODY. 2 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.