The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-543-5641, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Eaton Corporation Dba Eaton Inoac. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-543-5641 |
| Primary Part Number | 6432021 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Eaton Corporation Dba Eaton Inoac |
| Status | ACTIVE |
| Exterior Color | BROWN OR GREEN |
| Maximum Operating Temp | 155.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| 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 |
|---|---|
| 6432021 PRIMARY | Eaton Corporation Dba Eaton Inoac (USA) |
| Reference | Meaning |
|---|---|
| 64020H | 5/9 Secondary reference Eaton Corporation Dba Eaton Inoac |
NSN 4730-01-543-5641 is a Coupling Half,quick Disconnect, manufactured by Eaton Corporation Dba Eaton Inoac, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-543-5641 has 1 manufacturer part number on file: 6432021 (Eaton Corporation Dba Eaton Inoac).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-604-5373. Verify interchangeability with system specifications before substitution.
Key specifications for 6432021: Overall Length: 4.870 INCHES NOMINAL IN; Exterior Color: BROWN OR GREEN; Maximum Operating Temp: 155.0 FAHRENHEIT SINGLE RESPONSE DEGF; Special Features: THIS IS A 2 INCH UNISEX COUPLINGS ON 1 END AND A QUICK DISCONNECT COUPLING ON THE OTHER. IN. 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.