Step Drill Socket Head Cap Screw Sizes No 3 to 1/2 Inch Combined Drill and Counterbore in 1 operation ID 15995
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3-Flute CNC Counterbores Cobalt Guided Pilot, Extended Straight Shank clearance for Socket Head Cap Screw ID 16014
The socket head cap screws are 100% Stainless Steel 18-8 (304) which offers a high level of chemical and corrosion resistance. Thread Diameter: 3/8
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Countersink vs. Counterbore Holes in Machining: Differences and Uses
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Everbilt 3/8 in.-16 x 2-1/2 in. Hex Socket Head Stainless Steel Socket Cap Screw 825458 - The Home Depot
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Countersink 90 Metric Degree Angle Clearance, Drill and Countersink for Flat Head Screw In One Operation ID 16073