The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-261-9582, 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 Northrop Grumman Systems Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-261-9582 |
| Primary Part Number | GC550FR1-1 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Connection Style | PLAIN ALL ENDS |
| Nominal Length | 0.812 INCHES IN |
| Connection Type | INTERNAL QUICK DISCONNECT ALL ENDS |
| Connection Type | FLANGE FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Bolt Hole Nominal Diameter | 0.064 INCHES IN |
| Mounting Flange Location | FIRST LEG |
| Leg Length | 1.000 INCHES NOMINAL IN |
| Features Provided | SELF-SEALING |
| Basic Shape Style | RECTANGULAR (INCLUDES SQUARE) FIRST FLUID END CONNECTION |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.312 INCHES IN |
| Bolt Hole Quantity | 4 |
| Nominal Width | 0.812 INCHES IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.312 INCHES IN |
| Material | ALUMINUM ALLOY BODY |
| Quick Disconnect Method | TWIST-LOCK ALL ENDS |
| Nominal Thickness | 0.500 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 |
| Part Number | Manufacturer |
|---|---|
| GC550FR1-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 405-00933 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-00-261-9582 is a Coupling Half,quick Disconnect, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-261-9582 has 1 manufacturer part number on file: GC550FR1-1 (Northrop Grumman Systems Corporation).
Key specifications for GC550FR1-1: Connection Style: PLAIN ALL ENDS; Nominal Length: 0.812 INCHES IN; Connection Type: INTERNAL QUICK DISCONNECT ALL ENDS; Connection Type: FLANGE FIRST FLUID END CONNECTION. 17 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.