They're 3/8-16 Grade 5 bolts- - - - -30-35 ft/lbs. should be about right. Any standard hardware torque chart should get you in the ball park.


ASTM A449 / SAE Grade 5*
Bolt Size TPI Proof Load (lbs) Tightening Torque (ft lbs)
Galv+Waxed Galv Plain
1⁄4 20 2,700 2,025 4 11 8
5⁄16 18 4,450 3,338 9 22 17
3⁄8 16 6,600 4,950 15 39 31
7⁄16 14 9,050 6,788 25 62 49
1⁄2 13 12,050 9,038 38 94 75
9⁄16 12 15,450 11,588 54 136 109
5⁄8 11 19,200 14,400 75 188 150
3⁄4 10 28,400 21,300 133 333 266

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!