The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-00-278-5537, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-278-5537 |
| Primary Part Number | 5308389 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Screw Thread Series Designator | UNS |
| Material | STEEL |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Thread Size | 3/8-27 |
| Style Designator | INVERTED NUT, TUBE, FLARE |
| Tube Outside Diameter for Which Designed | 0.188 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Smallest Inside Diameter | 0.191 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Seat Radius | 0.031 INCHES NOMINAL IN |
| Thread Pitch Diameters | +0.3487 TO 0.3509 INCHES IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4730-00-278-5537 is a Inverted Nut,tube Coupling, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-278-5537 has 2 cross-referenced part numbers: 5308389 (U S Army Tank Automotive Command Amsta-Im-Mm), 900931 (Sasco Inc Canadian Div).
There is 1 known substitute for 4730-00-278-5537: 5962-01-034-9832. Verify interchangeability with system specifications before substitution.
Key specifications for 5308389: Screw Thread Series Designator: UNS; Material: STEEL; Width Across Flats: 0.375 INCHES NOMINAL IN; Thread Size: 3/8-27. 12 total characteristics are documented in the Federal Logistics Information System.