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AN148657
Aeronautical Standard Screw
Description
Fastener Length: 9/16", Hole Diameter: 1/16", Thread: 1/4-28, Head Width: 7/32", Thread Length: 9/16"
Specifications
| Fastener Length | 0.552 inches minimum and 0.572 inches maximum |
|---|---|
| Hardness Rating | 32.0 rockwell c minimum and 36.0 rockwell c maximum |
| Head Diameter | 0.428 inches minimum and 0.448 inches maximum |
| Head Height | 0.250 inches minimum and 0.270 inches maximum |
| Head Style | Flat chamfer |
| Hole Configuration Style | Round |
| Hole Diameter | 0.070 |
| Hole Quantity | 6 |
| Hole Type | Drilled |
| Internal Drive Style | Hexagon |
| Length | 9/16 |
| Material | Steel |
| Material Specification | Ams 6322 assn std single material response |
| Surface Finish | 32.0 microinches threads, 63.0 microinches bearing surface of head |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Ams 2400 assn std single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.501 inches minimum and 0.572 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Across Flats | 0.219 inches minimum and 0.221 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN148657. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error