Posted by Jim.ME on May 27, 2023 at 15:17:04 from (67.242.176.154):
In Reply to: Bolt torque question posted by perryjosh64 on May 27, 2023 at 12:08:12:
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A bolt uses a nut to clamp unthreaded components. A screw makes threads of its own, or is used with threaded components. A hex head fastener, screwed into a threaded hole, like the ones retaining your water pump, are called hex head capscrews. Then there are socket (Allen type), Torx type and other capscrew head types.
For torque I agree with wore out and would add if you lubricated the threads (oil, grease, anti-seize, etc.) the torque should be even less. And CAT used grade 8 for most of their SAE bolts and capscrews. If you have to purchase new capscrews, I would get grade 8.
Be careful looking at torque charts. Some give a Nm (Newton meter) torque value right beside the ft.lb. torque and one might think it is an allowable range. It is not, it is the maximum torque for the respective torque measuring method.
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