Dead Stop is made to fit Bridgeport Machines, will also fit Fadal, Haas, Okuma, Mazak, Hurco, Mori Seiki and other CNC machines with use of different T-Nuts Base of the Dead Stop measures 2" dia. It has a large base for no movement surface mounting. Locating stop rod measures 1/4" dia. Flat on one end and rounded on the other to meet your needs A 5/16" hex wrench is all that is required for tightening Manufactured from American made aluminum and Stainless Steel. The ULTIMATE Dead Stop... The part stops here. Super Versitle Custom made table mounted part locator stop Mounting bolt size measures 3/8" -18 thread 9/16 T-nut fits 9/16 and 5/8" tables 3/4" dia. 303 Stainless Steel pivot pins Dead Stop is made to fit Bridgeport Machines, will also fit Fadal, Haas, Okuma, Mazak, Hurco, Mori Seiki and other CNC machines with use of different T-Nuts Base of the Dead Stop measures 2" dia. It has a large base for no movement surface mounting. Locating stop rod is made of 303 Stainless Steel and measures 1/4" dia. Flat on one end and rounded on the other to meet your needs A 5/16" hex wrench is all that is required for tightening Manufactured from American made aluminum and Stainless Steel.