The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-021-9078, 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 Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-021-9078 |
| Primary Part Number | 623289-1 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto |
| Status | ACTIVE |
| Connection Style | FLARED ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION |
| Connection Type | EXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END |
| Style Designator | MALE COUPLING HALF |
| Nominal Outside Diameter Tube Accommodated | 0.312 INCHES ALL ENDS IN |
| Leg Length | 0.550 INCHES NOMINAL IN |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES |
| Surface Treatment | ANODIZE BODY |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY AND STEEL CORROSION RESISTING BODY |
| Quick Disconnect Method | PUSH-PULL FIRST QUICK DISCONNECT END |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| 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 |
|---|---|
| 623289-1 PRIMARY | Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto (CAN) |
NSN 4730-01-021-9078 is a Coupling Half,quick Disconnect, manufactured by Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-021-9078 has 1 manufacturer part number on file: 623289-1 (Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto).
Key specifications for 623289-1: Connection Style: FLARED ALL ENDS; Connection Type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION; Connection Type: EXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END; Style Designator: MALE COUPLING HALF. 13 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.