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Style 372 Step Drills for Flat Head Screws

Style 372 Step Drills for Flat Head Screws

Style 372. For Drilling and Countersinking 82° Flat Head Screw Clearance Holes.
High Speed Steel. Jobbers length (except 7/16 and 1/2, which are shorter).
Easily resharpened. Does 2 jobs in a single pass.
Made in USA
Quantity Price Model Description Minor Diameter Major Diameter Step Length Flute Length Overall Length

$13.80 DRST372-4
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: #4, 1009-0113 0.116 15/64 3/8 2-5/8 3 7/8

$14.45 DRST372-5
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: #5, 1009-0114 0.128 F 3/8 2-7/8 4 1/8

$15.15 DRST372-6
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: #6, 1009-0115 0.142 9/32 1/2 2-15/16 4 1/4

$17.90 DRST372-8
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: #8, 1009-0120 0.169 Q 1/2 3-7/16 4 3/4

$19.50 DRST372-10
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: #10, 1009-0125 0.196 W 5/8 3-3/4 5 1/8

$24.14 DRST372-1/4
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: 1/4", 1009-0130 0.257 1/2 11/16 4-13/16 6 5/8

$37.85 DRST372-5/16
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: 5/16", 1009-0135 0.320 5/8 3/4 5-3/16 7 1/8

$52.50 DRST372-3/8
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: 3/8", 1009-0140 0.383 3/4 7/8 5-5/8 7 5/8

$68.35 DRST372-7/16
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: 7/16", 1009-0144 0.446 13/16 1 3-3/8 5 1/4*

$75.40 DRST372-1/2
Step Drill 372, HSS, for Flathead MachScrew Clearance w/ 82 deg Chamfer: 1/2", 1009-0145 0.510 7/8 1 3-1/2 5 1/2*