The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-289-9565, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-289-9565 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | RECESSED ALL ENDS |
| Bolt Circle Nominal Diameter | 5.875 INCHES IN |
| Connection Type | EXTERNAL QUICK DISCONNECT ALL ENDS |
| Connection Type | FLANGE FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Bolt Hole Nominal Diameter | 0.438 INCHES IN |
| Quick Disconnect Nominal Size | 4.000 INCHES ALL ENDS IN |
| Leg Length | 1.000 INCHES NOMINAL IN |
| Basic Shape Style | ROUND FIRST FLUID END CONNECTION |
| Nominal Outside Diameter | 6.750 INCHES IN |
| Bolt Hole Quantity | 8 |
| Material | ALUMINUM BODY |
| Quick Disconnect Method | PUSH-PULL ALL ENDS |
| Nominal Thickness | 1.000 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 68301 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4730-01-289-9565 is a Coupling Half,quick Disconnect, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5340-01-361-1279, 4720-01-478-9975. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-289-9565: Connection Style: RECESSED ALL ENDS; Bolt Circle Nominal Diameter: 5.875 INCHES IN; Connection Type: EXTERNAL QUICK DISCONNECT ALL ENDS; Connection Type: FLANGE FIRST FLUID END CONNECTION. 14 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.