The Nut,tube Coupling, cataloged under National Stock Number 4730-00-278-5453, 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 Textron Lycoming Inc Williamsport Plant. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 7 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 | 4730-00-278-5453 |
| Primary Part Number | STD176 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Textron Lycoming Inc Williamsport Plant |
| Status | CANCELLED |
| Thread Class | 3B |
| Material | COPPER ALLOY OVERALL |
| Nominal Thread Size | 0.312 INCHES IN |
| Width Across Flats | 0.371 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN |
| Thread Series | UNEF |
| Smallest Inside Diameter | 0.173 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN |
| Nut Style | TUBE COUPLING |
| Thread Quantity Per Inch | 32 |
| Nominal Tube Outside Diameter | 0.125 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Length to Shoulder | 0.281 INCHES NOMINAL IN |
| Nut Height | 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| STD176 | Textron Lycoming Inc Williamsport Plant (USA) |
| AN805-2 | Power Industries Inc (USA) |
| AN805-2 | Textron Lycoming Inc Williamsport Plant (USA) |
| MIL-F-6001 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| MIL-DTL-6001 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| AN805-2 | Aeronautical Standards Group Dept of Navy and Air Force (USA) |
| 5165169 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| AN805-2 | Franklin Engine Co Inc (USA) |
| 12890 | Franklin Engine Co Inc (USA) |
| 0589 | Power Industries Inc (USA) |
NSN 4730-00-278-5453 is a Nut,tube Coupling, manufactured by Textron Lycoming Inc Williamsport Plant, classified under FSC 4730 (No Item Name Available). Status: cancelled.
NSN 4730-00-278-5453 has 10 cross-referenced part numbers: STD176 (Textron Lycoming Inc Williamsport Plant), AN805-2 (Power Industries Inc), AN805-2 (Textron Lycoming Inc Williamsport Plant), MIL-F-6001 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-6001 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 5 more.
There are 12 known substitutes for 4730-00-278-5453: 2910-00-123-0078, 4730-00-203-4681, 4730-00-277-6403 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for STD176: Thread Class: 3B; Material: COPPER ALLOY OVERALL; Nominal Thread Size: 0.312 INCHES IN; Width Across Flats: 0.371 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN. 12 total characteristics are documented in the Federal Logistics Information System.
NSN 4730-00-278-5453 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.