Knob: Aluminum Ferrule: Aluminum Screw: 300 Series Stainless Steel Spring: 300 Series Stainless Steel All dimensions are in millimeters (Size Unit: mm) METRIC Thread Size Type Thread Code Shank Code A ±0.1 Min.Sheet Thickness Hole Size In Sheet +0.08 C Max. B ±0.1 E ±0.25 G ±0.64 T1 ±0.2 T2 Nom. Driver Size Unified Metric Unified Metric .112-40(#4-40) M3X0.5 PF41 PF15 440 M3 0 1.0 1.0 4.75 4.73 0.4 10.5 4 12.1 11.3 #1 1 5.7 13.8 2 7.2 15.3 3 8.8 16.9 .112-40(#4-40) M3X0.5 PF42 PF25 440 M3 0 1.8 1.8 4.75 4.73 0.4 10.5 4.7 12.8 11.3 #1 1 6.4 14.5 2 7.9 16 3 9.5 17.6 .138-32(#6-32) M3.5X0.6 PF41 PF15 632 M3.5 0 1.8 1.8 5.4 5.38 0.4 11.5 6 16.4 15.3 #2 1 7.6 18 2 9.2 19.6 3 10.8 21.2 .138-32(#6-32) M3.5X0.6 PF42 PF25 632 M3.5 0 3.4 3.4 5.4 5.38 1.6 11.5 7.6 18 15.3 #2 1 9.2 19.6 2 10.8 21.2 .164-32(#8-32) M4X0.7 PF41 PF15 832 M4 0 1.8 1.8 6.75 6.73 0.4 13 6.4 16.9 15.6 #2 1 8 18.5 2 9.5 20 3 11.1 21.6 .164-32(#8-32) M4X0.7 PF42 PF25 832 M4 0 3.4 3.4 6.75 6.73 1.6 13 8 18.5 15.6 #2 1 9.5 20 2 11.1 21.6 .190-32(#10-32) M5X0.8 PF41 PF15 32 M5 0 1.8 1.8 6.75 6.73 0.4 13 6.4 16.9 15.6 #2 1 8 18.5 2 9.5 20 3 11.1 21.6 .190-32(#10-32) M5X0.8 PF42 PF25 32 M5 0 3.4 3.4 6.75 6.73 1.6 13 8 18.5 15.6 #2 1 9.5 20 2 11.1 21.6 .250-20(1/4-20) M6X1 PF41 PF15 0420 M6 0 1.8 1.8 8.2 8.17 0.4 14.7 7.8 20.5 19.3 #3 1 9.4 22.1 2 11 23.7 3 12.6 25.3 .250-20(1/4-20) M6X1 PF42 PF25 0420 M6 0 3.4 3.4 8.2 8.17 1.6 14.7 9.4 22.1 19.3 #3 1 11 23.7 2 12.6 25.3