THIS IS A CROSSLIDE FEEDNUT TO FIT A ROUNDHEAD COLCHESTER STUDENT CENTER LATHE...,IT IS  NEW AND UNUSED AND IS THREADED 3/4 X 5TPI LEFT HAND THREAD....THE UNDERSIDE IS TAPPED 7/16 BSF FOR THE HOLLOW FIXING BOLT,.....PLEASE CHECK YOUR OWN LATHE TO MAKE SURE IT IS THE CORRECT NUT.......IF YOUR EXISTING NUT HAS THE LETTER "M" STAMPED ON IT THEN IT IS A METRIC THREAD AND OUR NUT WILL NOT FIT IT !!! 

 WE DONT HAVE ANY METRIC NUTS, !!!!

ACME THREADS WEAR ON THE FLANKS ONLY,.    ..PLEASE CHECK YOUR SCREW FOR EXCESSIVE WEAR BEFORE ORDERING     AS THESE NUTS ARE TAPPED USING BSI TAPS AND CHECKED WITH BSI GAUGES......,RETURNS ARE A WASTE OF TIME AND MONEY ALL ROUND,....A NEW NUT WILL NOT SOLVE THE PROBLEM OF A BADLY WORN FEEDSCREW !

 WE NOW LIST THE MALE THREAD (( See Sellers other items !!)) ON EBAY

 PLEASE NOTE ....THE HOLLOW FIXING BOLT ALLOWS ADJUSTMENT UP OR DOWN TO ENSURE THE NUT DOES NOT BIND SO DO NOT OVER TIGHTEN THE BOLT A WASHER OR SHIM MAY BE NEEDED AS THE HEIGHT CAN VARY ACCORDING TO WHEN THE LATHE WAS BUILT. ORIGINAL HOLLOW HOLDING BOLTS FITTED IN A REAMED HOLE TO PREVENT SIDEWAYS MOVEMENT AND ARE HOLLOW TO ALLOW OIL DIRECTLY INTO THE NUT !! MADE FROM CZ121 BRASS

... ALSO AVAILABLE FOR COLCHESTER TRIUMPH 2000 ROUND HEAD<SEE SELLERS OTHER ITEMS!!!