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Join Date: Dec 2003
Location: springfeild twp,mercer co
assembling sticks or stands
after reading about some bolt failures on climbing sticks, i thought i'd post the torque specs for 1/4 and 5/16 bolts, the most common sizes used in these products.
1/4-20 grade 2(no lines) 6 ft lbs
1/4-20 grade 5(3 lines) 7 ft lbs
1/4-20 grade 8(6 lines) 11 ft lbs
5/16-18 grade 2, 15 ft lbs
5/16-18 grade 5, 18 ft lbs
5/16-18 grade 8, 22 ft lbs
tightening bolts past their stated torque spec simply stretches the bolt, it doesn't make it tighter, it actually weakens it. even 22 ft lbs is really easy to overdo with a 1/2" wrench, and 6 or 7 ft lbs is honestly not much more than finger tight. if you're worried about nuts coming loose, replace them with self locking nuts and grade 8 bolts, but don't overtighten them.