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AN4DD7A
Aeronautical Standard Machine Bolt
Description
Fastener Length: 57/64", Thread: 1/4-28, Thread Length: 7/16", AN4 series bolt
Specifications
| Fastener Length | Between 0.891 inches and 0.938 inches |
|---|---|
| Features Provided | Finished head |
| Grip Length | Between 0.422 inches and 0.453 inches |
| Head Height | Between 0.140 inches and 0.172 inches |
| Head Style | Hexagon Head |
| Material | Aluminum |
| Material Specification | Qq-a-200 federal specification single material response or qq-a-225 federal specification single material response or qq-a-430 federal specification single material response |
| Min. Tensile Strength (psi) | 62000 pounds per square inch |
| Surface Treatment | Oxide film and anodize |
| Surface Treatment Specification | Mil-c-5541 military specification 1st treatment response and mil-a-8625 military specification 2nd treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.438 inches and 0.516 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.428 inches and 0.440 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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.
- AN4C7 AN 1/4-28 · 15/16 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error