The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-397-3112, 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 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-397-3112 |
| Primary Part Number | GC550FP1-1 |
| 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 | 2.500 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 | 0.125 INCHES IN |
| Features Provided | SAFETY LOCKING FEATURE |
| Basic Shape Style | RECTANGULAR (INCLUDES SQUARE) FIRST FLUID END CONNECTION |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.812 INCHES IN |
| Bolt Hole Quantity | 4 |
| Nominal Width | 2.500 INCHES IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.812 INCHES IN |
| Material | STEEL BODY |
| Quick Disconnect Method | TWIST-LOCK 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 |
|---|---|
| GC550FP1-1 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 6500-943000 | 3/2 Design control — primary reference U.S. Government activity |
| 405-00943 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-397-3112 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 4730-00-397-3112 has 1 manufacturer part number on file: GC550FP1-1 (Northrop Grumman Systems Corporation).
Key specifications for GC550FP1-1: Connection Style: PLAIN ALL ENDS; Nominal Length: 2.500 INCHES IN; Connection Type: INTERNAL 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.