Metric Socket Head Cap Screw Key Information and Head Dimensions Screw Size M1.6 M2 M2.5 M2.6 M3 M4 M5 M6 M8 M10 Decimal Equiv. .063" .079" .098" .102" .118" .157" .197" .236" .315" .394" Hex Key, mm 1.5 1.5 2 2 2.5 3 4 5 6 8 Pitch, mm 0.35 0.4 0.45 0.45 0.5 0.7 0.8 1 1.25 1.5 Head Ht., mm 1.6 2 2.5 2.6 3 4 5 6 8 10 Head Dia., mm 3 3.8 4.5 5 5.5 7 8.5 10 13 16 Screw Size M12 M14 M16 M18 M20 M24 M30 M36 M39 Decimal Equiv. .472" .551" .630" .709" .787" .945" 1.181" 1.417" 1.535" Hex Key, mm 10 12 14 14 17 19 22 27 27 - Pitch, mm 1.75 2 2 2.5 2.5 3 3.5 4 - - Head Ht., mm 12 14 16 18 20 24 30 36 39 - Head Dia., mm 18 21 24 27 30 36 45 54 - -
· *Here are some quick formulas to help you get the most from your tools. | |||
RPM | Revolutions per Minute | = | (3.82 x SFM) / diameter |
SFM | Surface Feet per Minute | = | .262 x diameter x RPM |
IPM | Inches per Minute | = | FPT x RPM x number of flutes(or teeth) |
Cubic IPM | Required Horsepower from Machine | = | depth x width x IPM |
FPR | Feed per Revolution | = | IPM / RPM |
IPM | Inches per Minute | = | RPM x feed (for drilling) |
FPT | Feed per Tooth | = | FPR / number of teeth |
