Jig Screws – Jack Screws

Jack screws are used in fixtures to support irregularly shaped work pieces, such as castings and to eliminate bowing or warping of thinner materials during machining. Made from heat treated steel with a black oxide finish.


S&W P/N Thread (A) Thread Length (B) Nut O.D. (C) Total Length (D)
JS-500 3/8-16 1 1/4 1 1/8 1 7/8
JS-510 3/8-16 1 5/8 1 1/8 2 1/4
JS-515 3/8-16 2 1 1/8 2 5/8
JS-520 1/2-13 1 1/4 1 1/8 1 7/8
JS-525 1/2-13 1 5/8 1 1/8 2 1/4
JS-530 1/2-13 2 1 1/8 2 5/8
JS-535 1/2-13 2 1/2 1 1/8 3 1/8
JS-540 5/8-11 1 5/8 1 3/8 2 1/4
JS-545 5/8-11 2 1 3/8 2 5/8