C.R. LAURENCE M6021 CRL Brass Sliding Shower Door Towel Bar Bracket. The chrome plated diecast CRL Towel Bar Bracket has a 6-32 internal threaded stud and accepts a 3/8 by 3/4 inch (9.5 by 19.1 millimeter) towel bar Cat No. M6073 and M6074. It can be used on both shower and tub enclosure doors.. Part Numbers Variations: M6021
Universal Design