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AN565AC428H20
Aeronautical Standard Setscrew
Description
Fastener Length: 1-1/4", Thread: 1/4-28, Head Width: 1/8", Thread Length: 1-1/4"
Specifications
| Fastener Length | 1.250 |
|---|---|
| Head Style | Headless (setscrew) |
| Internal Drive Style | Hexagon |
| Length | 1 1/4 |
| Material | CRES |
| Material Specification | Mil-s-7720 mil spec 1st material response or mil-s-18732 mil spec 2nd material response |
| Point Style | Flat |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.250 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.
- AN565AC428H5
- AN565AC428H10
- AN565AC428H20
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.
- AN565DC428H20 AN 1/4-28 · 0.073 in · Headless (setscrew) · CRES
- AN565F428H20 AN 1/4-28 · 0.073 in · Headless (setscrew) · Steel
- 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