spring fitting ST#1400 6"S Single thread for LH or RH wound springs Maximum wire size -.4375" diameter Set includes(2)winding & (2)stationary Color coded winding fittings and stationary fittings 3/8"-16x2" hardened cup point set screws installed with red heads For use on solid shaft-max30ft*lbs set screw torque Can be combined with 3-3/4" spring fittings for duplex assembly 1" bore