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AN525-416R32
Aeronautical Standard Machine Screw
Description
Fastener Length: 1-63/64", Thread: 1/4-28, Thread Length: 29/64", AN525 series screw
Specifications
| Extended Washer Diameter | 0.490 inches minimum and 0.510 inches maximum |
|---|---|
| Extended Washer Thickness | 0.028 inches minimum and 0.033 inches maximum |
| Fastener Length | 1.969 inches minimum and 2.031 inches maximum |
| Head Diameter | 0.427 inches minimum and 0.447 inches maximum |
| Head Height | 0.096 inches minimum and 0.106 inches maximum |
| Head Style | Round extended washer |
| Internal Drive Style | Cross recess type 1 |
| Length | 1 63/64 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Screw Material | Steel comp 8630 or steel comp 4037 |
| Screw Material Specification | Mil-s-6050 mil spec 1st material response or ams 6300 assn std 2nd material response |
| Screw Surface Treatment | Cadmium or zinc |
| Screw Surface Treatment Specification | Qq-p-416 fed spec 1st treatment response or qq-z-325 fed spec 2nd treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.299 inches minimum and 0.453 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
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.
- AN525-416R18 AN 1/4-28 · 0.073 in · Round extended washer · Steel
- AN525-416R24 AN 1/4-28 · 0.073 in · Round extended washer · Steel
- AN525-416R28 AN 1/4-28 · 0.073 in · Round extended washer · Steel
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Catalog data updated 2026-07-05. Report a data error