Thumb screw 8 spans {HEAD ~ slot} 8a formed by {TAIL ~ arms} 8b and 8c, and is used to clamp one end of a metal electrical conduit pipe 35 when bending the pipe 
formed by
Thumb screw 8 spans { HEAD ~ slot } 8a formed by { TAIL ~ arms } 8b and 8c , and is used to clamp one end of a metal electrical conduit pipe 35 when bending the pipe
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH