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CENTRAL CHAIN & TRANSMISSION CO, INC.

Shop reference

Fractions & decimals

The same conversion chart that's in the back of our catalog — every 32nd of an inch, plus a quick inch/millimeter converter for metric parts.

Measure in inches

Converting inches to millimeters

1 inch is equal to 25.4 mm. Measure in inches and multiply by 25.4 — for example, 0.7874″ × 25.4 = 20 mm.

Fractions of an inch

Every 32nd, decimal equivalents

Bigger tiles are the common cuts — quarters and eighths — just like the catalog page.

  • 1/32 .03125
  • 1/16 .0625
  • 3/32 .09375
  • 1/8 .125
  • 5/32 .15625
  • 3/16 .1875
  • 7/32 .21875
  • 1/4 .250
  • 9/32 .28125
  • 5/16 .3125
  • 11/32 .34375
  • 3/8 .375
  • 13/32 .40625
  • 7/16 .4375
  • 15/32 .46875
  • 1/2 .500
  • 17/32 .53125
  • 9/16 .5625
  • 19/32 .59375
  • 5/8 .625
  • 21/32 .65625
  • 11/16 .6875
  • 23/32 .71875
  • 3/4 .750
  • 25/32 .78125
  • 13/16 .8125
  • 27/32 .84375
  • 7/8 .875
  • 29/32 .90625
  • 15/16 .9375
  • 31/32 .96875
  • 1 1.000

Metric part in a standard machine?

If it isn't on the shelf, our supplier network probably has it. Call the counter and we'll track down the size you need.