Metric Machine Screws Size Chart

Size of screws and metric to imperial screw conversion chart and how to identify the diameter and length of imperial and metric screws.

Metric machine screws size chart.

Decimal nearest fractional 0. Asm makes it easy to order metric hardware including metric screws spacers and standoffs. Therefore pan head screws are measured from under the head and flat head screws are measured overall. Metric bolt conversion data for industrial bolts rods machine screws and small diameter fasteners includes metric to standard bolt conversions.

Length length is measured from where the surface is assumed to be to the end of the screw. M3 0 5 m4 0 7 m5 0 8 m6 1 m7 1 m8 1 m8 1 25 m10 1 m10 1 25 m10 1 5 m12 1 25 m12. Metric screw thread chart metric tap size tap drill inches clearance drill inches m1 6 x 0 35 55 0 052 50 0 070 m1 8 x 0 35 53 0 057 48 0 0 76 m2 x 0 4 52 0 063 45 0 082 m3 x 0 5 39 0 0995 1 8 0 125 m3 5 x 0 6 32 0 116 28 0 140 m4 x 0 7 29 0 136 19 0 166 m4 5 x 0 75 25 0 1495 14 0 182. Do not use these values for standard metric internal thread design.

Size nominal thread diameter. 10mm x 1 5mm 8mm x 1 25mm 3mm x 0 5mm 6mm x 1 0mm 4mm x 0 7mm 5mm x 0 8mm. The chart below shows metric bolt conversions and din numbers for fasteners. Sizing the right screw can be complicated unless you are familiar with the various screw sizings that are quoted on the packaging often both in imperial and metric.

Make sure that you get the right sized screw. Metric machine screws tap drills chart this table is the chart for publication of information of metric machine screws along with tap and clearance drill information. How to order metric parts. All units in mm.

For example for a threaded spacer the metric requirement might be m 3 5 x 0 6 thread. Once you have selected one of our american standard parts you just need to add your metric requirement in the rfq. These thread sizes and classes represent bolts and screws as well as other standard external threads. The following table chart defines standard metric external thread size m1 6 to m18 per.