Helpful guide to the Metric to Fractional Interchange with today’s most popular sizes.
This winter are you planning on assembling an on-board tool kit for your Perkins marine engine? Or maybe a field service kit for your Deutz in a screening plant? Here’s a way to save time, weight, space, and money: use selected standard sizes and metric size sockets interchangeably.
Listed below are common interchanges that are safe to use and will insure a snug fit. As a precaution, try not to exceed 5 thousandths difference in size to avoid rounded-off head bolts.
|
Standard Fractional Size |
Metric Size |
Difference in Thousandths |
|
15/64 |
6 |
.002 |
|
5/16 |
8 |
.003 |
|
7/16 |
11 |
.004 |
|
5/8 |
16 |
.005 |
|
3/4 |
19 |
.006 |
Written by Dr. Diesel
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