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Speaking of nuts and bolts.....I just finished outside working to de-rust Brutus while the weather holds. The rear spring mounts and bolts weren't as bad as I thought they were. The folks that bobbed my Deuce used Grade 5 bolts to mount the spring hangers to the frame. I probably would have gone...

Some of the cast iron castings/parts found on old machinery were things of beauty.

I know about the yellow lines. They had small, portable gas turbine driven emergency 250 gpm fire fighting pumps in the Navy for a while. The instructors warned us never to stand in line with the turbine casing when starting or running them. The instructors told us that a sailor had been killed...

Thanks Frank! I especially want to read screw thread design!

Now that's a scary thought! I'll have to ask my brothers about that. They're both mechanical engineers and design turbine engine parts. One works for Pratt & Whitney and the other for General Electric.

AMEN Tim!!! I have seen and done stupid myself. Now, I really pay attention to what I'm doing. Especially when rotating assemblies are involved! By the way, I was visiting with an 87 year old former Navy Electricians Mate today. Mitch served from 53-57'. I'm 67 and served from 73-77'. Twenty...

Yup. I can see some frame bolts and such being put on with an impact wrench. Many times professional truck mechanics are under a lot of pressure to get it done. I worry most about under torquing fasteners and having something come loose while operational and I hate the idea of stripping out...

Thank you Will! Just glanced over them and the top of my head exploded! I'm going to have to look at it again when I've had more rest. The metric stuff just gives me brain freeze every time.

Wow Frank that those are some interesting specs! Realistically, I think carbon steel hex head Grade 5 ( 3 raised Marks ) and Grade 8 ( five raised marks ) bolts are the most common bolts a Steel Soldier will likely see. I think this also applies to nuts installed over studs as well. The thread...

Thank you! I'm glad you found it useful. Sometimes when I'm beat and my hands are stained with grease, I just want a quick, reliable answer. This chart has provided that for me. I am aware that their are certain situations in which specific manufacturer requirements may differ a bit from the...

I posted this in another thread to answer a question if there are specific values that bolts are supposed to torqued too. The answer is yes, because what you are really doing from an engineering/physics standpoint is stretching the thread a predetermined amount. Not so important on various...