8X1 5/8 6 Lobe Flat Nibs Coarse Thread Type 17 Exterior Screw Partial Thread Zinc Yellow (Pack Qty 4,900) BC-0826DTF17Y

An externally threaded fastener with a countersunk head, six-lobed recess, a single lead thread. The shank has a reduced diameter and a chip cavity cut out where the final several threads end at the tip The deeper thread design offers greater resistance to pull-out forces. The six-lobe recess transmits drive torque with less required downward pressureYou may also like 1/4-20X3/4 Six Lobe Flat Thread Cutting Screw Type F Fully Threaded 18-8 Stainless Steel (Pack Qty 2,000) BC-1412FTF188.