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.....Next there are some nipples that don't have the internal square drive hole, but are round inside and nearly 1/2 in. in diameter. They use a hex on the outer flange. If you can't find one it is a relatively simple matter to drill out the square drive [ do it in stages ] to 1/2 in. Then simply grind a hex on the flange so you can use a socket. 13/16 works pretty well.....



If you go this way, save yourself some grief. Buy a new socket and grind the entrance ramps off the socket's opening. The flange on the nipple is very thin and most sockets won't firmly grip the nipple which results in rounding off the hex on the nipple. With the socket modification you get full socket engagement and prevent this problem.

"We live in a time when intelligent people are being silenced so that stupid people won't be offended".