m3 bolt hole size Metric clearance hole chart for metric bolts and screws according to ASME B18 2 8 M2 Clearance Hole Close fit 2 2 mm Normal fit 2 4 mm Loose fit 2 6 mm M3 Clearance Hole Close fit 3 2 mm Normal fit 3 4 mm Loose fit 3 6 mm M4 Clearance Hole Close fit 4 3 mm Normal fit 4 5 mm Loose fit 4 8 mm M5 Clearance Hole
Screw Size Major Dia mm mm per Thread Drill Size Closest Imperial Drill Size Closest Imperial Drill Size Closest Imperial M3 x 0 5 3 0 5 2 5 39 2 70 36 3 4 29 3 30 30 M3 5 x 0 6 3 5 0 6 2 9 32 3 10 31 3 9 23 3 85 Deciding if the hole should have a close normal or loose fit depends on the scope of the project For example a looser fit simplifies the assembly process and a closer fit allows for tighter tolerances Use the table below to determine the clearance hole size for
m3 bolt hole size
m3 bolt hole size
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Metric Threads Clearance Holes and Tapping Drill Sizes Size Nominal Diameter mm Pitch mm Clearance Hole mm Tap Drill Standard Pitch mm Fine Medium Coarse 1 6 0 35 1 7 1 8 2 1 8 0 35 2 0 2 0 40 2 2 2 25 2 6 2 2 0 45 2 45 2 5 0 45 2 7 2 8 3 1 3 0 50 3 2 3 35 3 6 3 5 0 60 3 9 4 0 70 4 3 4 5 4 8 4 5 0 Metric clearance hole calculator for bolts and screws to calculate the recommended clearance hole sizes from M1 6 through M64 in three classes of clearance using close normal and loose fit category The recommended metric drill bit size for each class of clearance hole is shown in calculation results with nearest substitute inch drill bit size
The M8 bolt has a diameter D of 8 mm and a head diameter DH of 13 mm The bolt clearance hole CH is calculated using the formula CH D DH 2 CH 8 mm 13 mm 2 CH 21 mm 2 CH 10 5 mm Or use our calculator to save your time Industrial Press Inc ASME B18 2 8 1999 Clearance holes for bolts screws and studs Clearance hole chart for inch bolts and screws Drill size and hole diameter for normal close and loose fit classes are tabulated
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Min Hole Size mm Max Hole Size mm The recommended drill and hole sizes for metric fasteners are tabulated in this table calculator All dimensions are recommendations only and are shown in mm Metric threads Unified threads Tapping sizes and clearance holes for metric and unified threads
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m3 bolt hole size - The M8 bolt has a diameter D of 8 mm and a head diameter DH of 13 mm The bolt clearance hole CH is calculated using the formula CH D DH 2 CH 8 mm 13 mm 2 CH 21 mm 2 CH 10 5 mm Or use our calculator to save your time