Bolting 3

[cpercival]

Just wanted to know what are the considerations in changing from a regular head bolt to a C'sk head bolt in terms of the stress it can withstand & hence induced load. I am having to consider a C'sk due to reduced head height, and are using the same thread ( M8).

Thanks
Clive

 

[Tmoose]

countersunk usually means conical hole, and a flat head screw.
counterbore allows a "real" hex or socket head.

Flat head screws of equal grade accept about 40% less torque and clamping than SHCS.

compare PDF document page 90 and 93 here. (Page 83 and 86 catalog page numbers)

http://www.holo-krome.com/pdf/technical catalog.pdf