screws › machine screws
AN520-6-8
Aeronautical Standard Screw
Description
AN 520-6-8 Round Head Machine Screw
Specifications
| Fastener Length | 0.500 |
|---|---|
| Finish | Cadmium l |
| Head Height | 0.103 inches maximum |
| Head Style | Round Head |
| Internal Drive Style | Slot |
| Length | 1/2 |
| Material | Steel |
| Min. Tensile Strength (psi) | 55000 pounds per square inch |
| Screw Material | Steel or steel comp 1010 |
| Screw Material Specification | Qq-s-630 fed spec 2nd material response or qq-s-631 fed spec 2nd material response or qq-s-634 fed spec 2nd material response |
| Screw Surface Treatment | Cadmium |
| Size | 6-40 |
| Thread Class | 2a |
| Thread Diameter | 0.138 |
| Thread Direction | Right-hand |
| Thread Length | 0.450 inches minimum and 0.500 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNF |
| Thread Size | 6 |
| Thread Type | N.F. - Fine |
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 AN520-6-8. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error