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AN520-6R4
Aeronautical Standard Screw
Description
Fastener Length: 7/32", Thread: 6-40, Thread Length: 13/64"
Specifications
| Departure From Cited Designator | As modified by internal drive styl and internal drive location |
|---|---|
| Fastener Length | 0.219 inches minimum and 0.250 inches maximum |
| Head Diameter | 0.240 inches minimum and 0.260 inches maximum |
| Head Height | 0.103 inches maximum |
| Head Style | Round Head |
| Internal Drive Style | Cross recess type 1 |
| Length | 1/4 |
| 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 |
| Screw Surface Treatment Specification | Qq-p-416,ty 1,cl 3 fed spec single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.138 |
| Thread Direction | Right-hand |
| Thread Length | 0.200 inches minimum and 0.250 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNF |
| Thread Size | 6 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN520-6R4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error