Screw - Physics & Astronomy

Stud similar to a bolt but without the head. ... ISO metric thread M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M16 M20 M24 M30 M36 M42 M48 M56 M64 wrench size (mm) 3.2 4 5 5.5 7 8 10 13 17 19 24 30 36 46 55 65 75 85 95 In addition, the following non-preferred intermediate sizes are specified: ... Sizes 1/4" diameter and larger are designated as 1/4"-20 ... ................
................