Sure Grip knobs, parts, plastic, injection Threaded Insert Insert Part No. Thread Depth 30081/4-20 3/8 W Part No. Projecting Stud Stud Thread Length Max Length 3008BR 1/4-20 3/4 3-1/2 3008CW 1/4-20 1 3-1/2 3008DX 5/16-18 3/4 3-1/2 3008EV 3/8-16 1 3-1/2 http://www.daviesmolding.com/cgi-bin/part_ser.pl?page=sure...&series=3008&photo=suregrip&back=trigon&next=knurled_pheno1/29/2006 1:20:20 PM