The Nut,tube Coupling, cataloged under National Stock Number 4730-00-278-5451, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Cae Usa Inc.. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-278-5451 |
| Primary Part Number | 6191 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Cae Usa Inc. |
| Status | CANCELLED |
| Nominal Tube Outside Diameter | 0.250 INCHES IN |
| Thread Series | UNF |
| Nominal Thread Size | 0.438 INCHES IN |
| Material | COPPER ALLOY OVERALL |
| Material Document and Classification | QQ-B-626,CP 21 OR 22 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Width Across Flats | 0.556 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Nut Height | 0.500 INCHES NOMINAL IN |
| Length to Shoulder | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 20 |
| Thread Class | 3B |
| Fabrication Method | MACHINED |
| Nut Style | TUBE COUPLING |
| Smallest Inside Diameter | 0.316 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 6191 | Cae Usa Inc. (USA) |
| AN805-4 | Aeronautical Standards Group Dept of Navy and Air Force (USA) |
| 6191 | Raytheon Technical Services Company (USA) |
| 200230 | Renk America Llc Div Renk America (USA) |
| 14827 | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| MIL-DTL-6001 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 156D3 | Curtiss-Wright Controls, Inc. Div Actuation Division (USA) |
| AN805-4 | Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group |
| 0579 | Lawrence Aeronautical Corp (USA) |
| 7376064 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 156D3 | Curtiss-Wright Corp (USA) |
NSN 4730-00-278-5451 is a Nut,tube Coupling, manufactured by Cae Usa Inc., classified under FSC 4730 (No Item Name Available). Status: cancelled.
NSN 4730-00-278-5451 has 11 cross-referenced part numbers: 6191 (Cae Usa Inc.), AN805-4 (Aeronautical Standards Group Dept of Navy and Air Force), 6191 (Raytheon Technical Services Company), 200230 (Renk America Llc Div Renk America), 14827 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.) and 6 more.
There are 12 known substitutes for 4730-00-278-5451: 5910-00-100-5727, 5940-00-114-1317, 5330-00-154-7406 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 6191: Nominal Tube Outside Diameter: 0.250 INCHES IN; Thread Series: UNF; Nominal Thread Size: 0.438 INCHES IN; Material: COPPER ALLOY OVERALL. 14 total characteristics are documented in the Federal Logistics Information System.
NSN 4730-00-278-5451 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.