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Step Drill - For Drilling and Counterboring Cap Screw Clearance Holes  E-mail this product to a friend previous | up | next  Screw Size Minor Diameter Major Diameter Step Length Jobber Length Taper Length Flute Length Overall Length EDP No. Flute Length Overall Length EDP No. No. 5 .141 No. 1 3/8 2-5/8 3-7/8 317620 — — — No. 6 .150 1/4 1/2 2-3/4 4 317621 3-3/4 6-1/8 317630 No. 8 .178 "L" 1/2 2-15/16 4-1/4 317622 4 6-3/8 317631 No. 10 .204 "Q" 5/8 3-7/16 4-3/4 317623 4-1/8 6-1/2 317632 1/4 9/32 13/32 11/16 3-1/8 5-1/4 317624 4-3/8 7 317633 5/16 11/32 1/2 3/4 4-1/2 6 317625 4-3/4 7-3/4 317634 3/8 13/32 19/32 7/8 5-3/16 7-1/8 317626 4-7/8 8-3/4 317635 7/16 15/32 21/32 1 5-3/16 7-1/8 317627 — — — 1/2 17/32 25/32 1 3-1/4 5-1/8* 317628 6 9-7/8 317636 5/8 21/32 31/32 1 3-5/8 5-1/8* 317629 6-1/8 10 317637 *Shorter than Jobber Length SETS Jobber Length - EDP No. 173567 Taper Length - EDP No. 173568