fittings › tube fitting locknuts
AN6289J4
Aeronautical Standard Tube Fitting Locknut
Description
tube outer diameter: 1/4", thread: 7/16-20, corrosion resistant
Specifications
| Material | CRES |
|---|---|
| Material Specification | Qq-s-763,class 304 fed spec single material response |
| Nut Height | 0.281 |
| Nut Style | Tube fitting locknut |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35,type 1 fed spec single treatment response |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | UNF |
| Thread Size | 0.438 |
| Width Across Flats | 0.688 |
Other sizes
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Catalog data updated 2026-07-05. Report a data error