PRODUCT
CTC S18-C-75 - 7510100371 - UNC - unparallel serial #s
$5.00
CTC S31-Ba12-90 - 9001627372 - UNC - well centred
$17.00
CTC S18-E - 7500951430 - Fine - Offset serial #
$4.00
CTC S18-B-75 - 7521464998 - UNC - plugged nine
$3.00