http://www.everyspec.com/NASA/NASA+-+MSFC/MSFC-STD/MSFC-STD-486B-_Torque_Limits_For_Standard_Threaded_Fasteners_2503/ 1/4 inch Grade 8 - Table 1 - page 19 ( page 26 per Adobe) Socket head capscrews ( not stainless ) are pretty close to Grade 8. Dan T