====== Metric ======

^mm	^inches^ ^	
|1	|0.0394	||
|2	|0.0787	||
|3	|0.1181	|1/8"|
|4	|0.1575	||
|5	|0.1969	||
|6	|0.2362	|1/4"|
|7	|0.2756	||
|8	|0.315	||
|9	|0.3543	|3/8"|
|10	|0.3937	||
|11	|0.4331	||
|12	|0.4724	||
|13	|0.5118	|1/2"|
|14	|0.5512	||
|15	|0.5906	||
|16	|0.6299	|5/8"|
|17	|0.6693	||
|18	|0.7087	||
|19	|0.748	|3/4"|
|20	|0.7874	||
|21	|0.8268	||
|22	|0.8661	|7/8"|
|23	|0.9055	||
|24	|0.9449	||
|25	|0.9843	||
|26	|1.0236	|1"|




^SAE Size^Approximate Diameter (inches)^Approximate Diameter (mm)^Closest Metric Equivalent^Metric Major Diameter (mm)^
|0      |0.060      |1.524      |M1.6      |1.6|
|1      |0.073      |1.854      |M1.8      |1.8|
|2      |0.086      |2.184      |M2      |2.0|
|3      |0.099      |2.515      |M2.5      |2.5|
|4      |0.112      |2.845      |M2.5 or M3      |2.5 or 3.0|
|5      |0.125      |3.175      |M3      |3.0|
|6      |0.138      |3.505      |M3.5      |3.5|
|8      |0.164      |4.166      |M4      |4.0|
|10     |0.190      |4.826      |M5      |5.0|
|12     |0.216      |5.486      |M5 or M6      |5.0 or 6.0|
|1/4"   |0.250      |6.350      |M6      |6.0|
|5/16"  |0.3125     |7.938      |M8      |8.0|
|3/8"   |0.375      |9.525      |M10      |10.0|
|7/16"   |0.4375     |11.113     |M10 or M12      |10.0 or 12.0|
|1/2"   |0.500      |12.700     |M12      |12.0|
|9/16"  |0.5625     |14.288     |M14      |14.0|
|5/8"   |0.625      |15.875     |M16      |16.0|
|3/4"   |0.750      |19.050     |M20      |20.0|
|7/8"   |0.875      |22.225     |M22      |22.0|
|1"     |1.000      |25.400     |M24 or M25      |24.0 or 25.0|


^Metric Size	^Major Diameter (mm)	^Major Diameter (inches)^
|M1.6	|1.6	|0.063|
|M1.8	|1.8	|0.0709|
|M2	|2	|0.0787|
|M2.2	|2.2	|0.0866|
|M2.5	|2.5	|0.0984|
|M3	|3	|0.1181|
|M3.5	|3.5	|0.1378|
|M4	|4	|0.1575|
|M4.5	|4.5	|0.1772|
|M5	|5	|0.1969|
|M6	|6	|0.2362|
|M7	|7	|0.2756|
|M8	|8	|0.315|
|M10	|10	|0.3937|
|M12	|12	|0.4724|