Scroll over to the LH side of the Home Page and look under RESEARCH & INFO for the TORQUE VALUE Chart listed and you will find all the info on how Bolt Heads are marked. THREE equal hash marks indicates GRADE 5. Works fine for a SHEAR BOLT. Use a 5/8-18 HEX HEAD shoulder bolt, lockwasher, and hex nut. A shoulder bolt has a partial non-threaded end under the head. Grade 2 is softer and also can work. Use on a brush hog or finish mower. Made to break away if obstruction is hit so you don't do damage to your gear box. Helps to also use with an ORC (Over Running Clutch). Bolt length only needs to be long enough to cover the washer and nut with 2 or 3 threads exposed. Longer does nothing. Brush hogging tip: always walk the area first to uncover any hidden objects that will obstruct damage gear box. Look for old stoves and fridges, cars, stumps, large rocks/boulders, Jimmy Hoffa, etc. Question is why are you breaking so many shear bolts???
5/8-18 X2-3/4 HEX HEAD BOLT, PARTIALLY THREADED (SHOUDLER) BOLT: https://www.mcmaster.com/products/screws/hex-head-screws~/medium-strength-grade-5-steel-hex-head-screws/thread-size~5-8-18/length~2-750/length~2-75/length~2-3-4/
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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