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AN505C3-4
Aeronautical Standard Screw
Description
Fastener Length: 1/4", Thread: 3-48, Thread Length: 1/4"
Specifications
| Countersink Angle | 80.0 degrees minimum and 82.0 degrees maximum |
|---|---|
| Fastener Length | 0.219 inches minimum and 0.250 inches maximum |
| Head Diameter | 0.175 inches minimum and 0.199 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 1/4 |
| Material | Steel |
| Screw Material | Steel comp 303 or steel comp 303se or steel comp 430 or steel comp 302 |
| Screw Material Specification | Mil-s-7720 mil spec 1st material response or mil-s-18732 mil spec 2nd material response or qq-s-763 fed spec 3rd material response or mil-s-7720 mil spec 4th material response |
| Screw Surface Treatment | Passivate |
| Thread Class | 2a |
| Thread Diameter | 0.099 |
| Thread Direction | Right-hand |
| Thread Length | 0.208 inches minimum and 0.250 inches maximum |
| Thread Qty | 48 |
| Thread Qty Per Inch (tpi) | 48 |
| Thread Series Designator | UNC |
| Thread Size | 3 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN505C3-4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error