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AN508-4-3
Aeronautical Standard Screw
Description
AN 508-4-3 Round Head Machine Screw
Specifications
| Fastener Length | 0.188 |
|---|---|
| Finish | Silver Plate |
| Head Diameter | 0.193 inches minimum and 0.211 inches maximum |
| Head Height | 0.075 inches minimum and 0.087 inches maximum |
| Head Style | Round Head |
| Internal Drive Style | Slot |
| Length | 3/16 |
| Material | Brass |
| Screw Material | Copper alloy |
| Screw Material Specification | Qq-b-613 fed spec single material response or qq-w-321 fed spec single material response |
| Screw Surface Treatment | Nickel and copper |
| Size | 4-40 |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.188 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 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 AN508-4-3. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error