The following is a table of bolt specifications, including metric bolt specifications and imperial bolt specification. Through this table, you can determine the maximum torque used by hydraulic wrenches through the size and strength of bolts and nuts. This table can also help you find suitable tools, such as bolt tensioners!

Metric bolt specification

Bolt Specifications DWidthAcrossFlats of Bolt Cap SWidthAcrossFlats of Shrank J
M10*1.5178
M12*1.751910
M14*22212
M16*22414
M20*2.53017
M22*2.53417
M24*33619
M27*34119
M30*3.54622
M33*3.55024
M36*45527
M39*46027 (30)
M42*4.56532
M45*4.570–
M48*57536
M52*58036
M56*5.58541
M60*5.59046
M64*69546
M68*610050
M72*610555
M76*611060
M80*611565
M85*612070
M90*613070 (75)
M95*6135–
M100*614585
M105*6150–
M110*6155–
M115*6165–
M120*6175–
M125180–
M130185–
M140200–
M150215–

Imperial bolt specification

Bolt Specifications DWidthAcross Flats of Bolt Cap SWidthAcross Flats of Shrank J
5/81     1/161/2
3/41     1/45/8
7/81     7/163/4
11     5/83/4
1     1/81     13/167/8
1     1/427/8
1     3/82     3/161
1     1/22     3/81
1     5/82     9/16–
1     3/42     3/41     1/4
1     7/82     15/161     3/8
231     1/2
23     1/81     5/8
2     1/43     3/81     3/4
2     1/43     1/21     3/4
2     1/23     3/41     3/4
2     1/23     7/81     7/8
2     3/44     1/82
2     3/44     1/42
34     5/82     1/4
3     1/452     1/4

Note：

The hexagonal dimensions listed in the above table are for reference only. The bolt dimensions should be checked in detail in certain working conditions.

According to the size and strength of bolts and nuts, determine the maximum torque for the spanner, and confirm the engineering manufacturer’s usage parameters when dealing with specific links.

When selecting a wrench, be sure to pay attention to the unmounting torque.

Heavy duty sleeves must conformISO2725/1301174/DIN3129/3121/ASME-B107.2/1995