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AN525-416-18
Aeronautical Standard Screw
Description
AN 525-416-18 Washer Head Machine Screw
Specifications
| Extended Washer Diameter | 0.500 |
|---|---|
| Extended Washer Thickness | 0.028 |
| Fastener Length | 1.125 |
| Finish | Cadmium ll |
| Grip Length | 23/32 |
| Head Diameter | 0.437 |
| Head Height | 0.101 |
| Head Style | Round extended washer, Washer Head |
| Internal Drive Style | Slot |
| Length | 1 1/8 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Screw Material | Steel comp 2330 |
| Screw Surface Treatment | Cadmium or zinc |
| Size | 1/4-28 |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.406 inches minimum |
| 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
No interchangeable or dimensionally similar parts are on record for AN525-416-18. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error