Width of nut across flats.
M5 bolt hole size.
When so specified by the purchaser the edges.
M3 m3 5 m4 m5 m6 m7 m8 m10 m12 m14 m16 m18 m20 m22 m24 m27 m30 m33 m36 m39.
Tap drill mm thread size.
Screw size major diameter plastics threads per inch minor aluminum brass diameter 75 thread for 50 thread for steel stainless iron close fit free fit drill size dec.
They were one of the first international standards agreed when the international organization for standardization iso was set up in 1947.
Drill size and clearance hole recommendations.
All dimensions are recommendations only and are shown in mm.
Clearance hole chart for inch bolts and screws according to asme b18 2 8.
The positioning of holes on opposite sides of the socket should be such that the hole alignment check plug will pass completely through the head without any deflection.
For typical coarse pitch thread bolts the standard sizes are.
Citation needed the m designation for metric screws indicates the nominal outer diameter of the screw thread in millimetres e g an m6 screw has a.
The width of the hexagon nuts across flats s is specified in iso 898 2 table a 1 for bolt sizes m5 to m39.
Tap drill mm thread size.
The allowable minor diameter indicates sizes from minimum to 6h but the fine threads smaller than m1 8 0 2 are 4h and that of smaller than m2 0 25 are 5h.
Metric clearance hole chart.
The iso metric screw threads are the most commonly used type of general purpose screw thread worldwide.
0 0600 80 0447 3 64 0469 55 0520 52 0635 50 0700 1 0730 64 0538 53 0595 1 16 0625.
Screw sizes are written in an alphanumeric code that can be difficult to decipher if you re not familiar with the system.