🔩 GRK 772691102256 16 Inch 4 Inch Screw: Ultimate Fastening Solution for Heavy-Duty Applications Review

Good faster for many applications. I used them to attach rain guard strips over the rigid foam. They are better than black head screws because of the coating, self-tapping tip and serrations on the underside of the pan head. The prongs allow you to sink the crown by simply tightening the clasp to the desired depth. Otherwise (e.g. Headlok) the countersink must be drilled with a Forstner bit.

These screws compare quite favorably to some others. I used them to screw 2" x 6" rough boards to fence posts. I like rounded heads so the animal can't scratch them. The screws tighten well, although I drill holes in the boards to prevent splitting and allow me to fine tune the position of the board before it becomes immobile. I also drive them in deep enough to countersink the screw heads a bit. This allows me to use a professional saw to cut to length and at the right angle. I'm already on my

although this may be the highest quality screw available, it does not match the manufacturer's description. THIS screw is listed as 5/16 inch. Shank Size .201", Thread O.D. .270". A shoulder 8 inches wide below the head is 5/16 or .312 of an inch. HEAD or 5/8 or .625. THIS screw drills the pilot hole. AUGERS shred the wood in the third step of the process when the reverse auger packs the wood chips back down creating a compaction I've never seen before. The propeller is very high quality, I…