screws › machine screws
AN525-8R8
Aeronautical Standard Machine Screw
Description
Washer Head Machine Screw
Specifications
| Country of Origin | USA |
|---|---|
| Extended Washer Diameter | 0.365 inches minimum and 0.385 inches maximum |
| Extended Washer Thickness | 0.023 inches minimum and 0.028 inches maximum |
| Fastener Length | 0.469 inches minimum and 0.531 inches maximum |
| Head Diameter | 0.302 inches minimum and 0.322 inches maximum |
| Head Height | 0.082 inches minimum and 0.092 inches maximum |
| Head Style | Round extended washer |
| Internal Drive Style | Cross recess type 1 |
| Length | 17/32 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Pre-Packaged Bag Quantity | 100 |
| 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 |
| Sold In | EA |
| Thread Class | 3a |
| Thread Diameter | 0.164 |
| Thread Direction | Right-hand |
| Thread Length | 0.272 inches minimum and 0.422 inches maximum |
| Thread Qty | 36 |
| Thread Qty Per Inch (tpi) | 36 |
| Thread Series Designator | UNF |
| Thread Size | 8 |
| Weight | .004 lb |
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 AN525-8R8. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error