Knob-Style Captive Fastener Provides Tool-Free Access Aug. 10, 2016 The new 4C Wing Knob captive screws from Southco, Concordville, Pa., can be quickly installed or removed by hand.

To make screws, the machine advances a length of steel rod into position, locks the turret, starts spinning, and introduces tooling to shape the head of the screw, another tool from the side to ...

[Pete] bought himself an old South Bend lathe, but unfortunately some of the thumb screws were missing from this fine old machine. Originally, the lathe had knurled thumbscrews, and with a thumbscr… ...

The new 4C Wing Knob captive screws from Southco, Concordville, Pa., can be quickly installed or removed by hand. Their over-molded, distinctively contoured wing-style head design ...