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AN565F428H20
Aeronautical Standard Setscrew
Description
Fastener Length: 1-17/64", Thread: 1/4-28, Head Width: 1/8", Thread Length: 1-17/64"
Specifications
| Departure From Cited Document | As modified by material |
|---|---|
| Fastener Length | 1.231 inches minimum and 1.269 inches maximum |
| Hardness Rating | 45.0 rockwell c minimum and 53.0 rockwell c maximum |
| Head Style | Headless (setscrew) |
| Internal Drive Style | Hexagon |
| Length | 1 17/64 |
| Material | Steel |
| Nondefinitive Specification/Std Data | 1 type and 3 style |
| Point Style | Oval |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,ty 2,cl 2 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.231 inches minimum and 1.269 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Across Flats | 0.125 inches minimum and 0.127 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- AN565F428H9
- AN565F428H14
- AN565F428H16
- AN565F428H20
- AN565F428H24
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- AN565AC428H20 AN 1/4-28 · 0.073 in · Headless (setscrew) · CRES
- AN565DC428H20 AN 1/4-28 · 0.073 in · Headless (setscrew) · CRES
- AN565FC428H20 AN 1/4-28 · 0.073 in · Headless (setscrew) · CRES
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Catalog data updated 2026-07-05. Report a data error