7/16-20 x 7/16" 錐端內六角止付螺絲 | 合金鋼 (100顆/包)

The hex socket drive allowed me to really crank down on these in a tight spot on my lathe without any slipping, and the threads cut cleanly every time. Pretty solid little screws for the price.

Had to swap out a stripped set screw on a milling machine table—these hex sockets took the high torque without rounding off, which was my biggest fear with cheaper ones. The cone point dug in exactly where I needed it.

The cone point seated firmly in my shaft collar without slipping, and the hex socket drive let me torque them down properly even in the tightest spot. All steel feels solid, and the whole hundred pack came threaded cleanly.