CRL 6-20 x 1/2" Pan Head Phillips Self-Drilling Screws
C.R. LAURENCE 20061601 CRL 6-20 x 1/2" Pan Head Phillips Self-Drilling Screws (100 Pack). CRL Self-Drilling Screws combine a drill and screw into a single efficient unit to save time and labor costs. They are designed to drill their own hole, cut or form mating threads, and make a complete fastening in a single operation. Each is precision machined and heat treated under exacting standards to ensure quality performance..