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The Fastcap #10 x 4" Powerhead screw is a flat head, coarse-thread wood screw with a Type 17 auger point, TX20 Torx drive, underhead nibs, and a zinc finish. At 4 inches, it reaches through thick stock and panel assemblies where shorter screws fall short.
Four inches of length makes this screw most useful where a standard 1-1/2" or 2" screw cannot reach the holding zone. Cabinet carcass assembly through thick side panels, face-frame attachment through stacked material, heavy millwork joinery, and wood-to-wood connections in built-in furniture and shelving are all natural fits. The coarse thread engages solid wood and plywood cleanly, so the screw is well suited to shop-built cabinet boxes, site-built cabinetry, and bench furniture. For indoor work where the screw head will be covered, filled, or set below the surface, the flat head and nibs give a tidy countersunk result without adding a drilling step.
The Powerhead profile is an oversized flat head, wider than a standard countersunk head of the same gauge. That broader bearing surface resists pull-through in softer substrates and distributes clamping force across more material at the seating point. The underhead nibs relieve wood fiber as the head descends, so the screw mills a clean countersink rather than crushing or tearing the surface. The zinc finish is appropriate for interior woodworking and cabinet shop use in dry conditions. The TX20 Torx drive holds the bit securely in the recess under load, which matters most on long screws like this one where the driver has to maintain torque through the full 4-inch thread engagement.
Cabinet shops, millwork installers, and finish carpenters who regularly work with thick stock or layered assemblies will find the 4-inch length genuinely useful rather than a specialty item. Homeowners and remodelers building site-built bookcases, entertainment units, or closet systems also benefit from a longer screw that can pull two panels together across a combined thickness that shorter hardware cannot span. This screw is for indoor work only. The zinc finish is not rated for exterior exposure, treated lumber, or high-humidity environments.
The Type 17 auger point has a longitudinal flute near the tip that cuts and clears wood fibers as the screw is driven. This reduces the torque needed to start and drive the screw and lowers the risk of splitting, particularly in denser wood or near panel edges.
No. The nibs mill the countersink as the head seats, so in most wood and panel substrates a separate countersink step is not needed. The head will sit flush after driving without additional prep.
The Type 17 auger point and coarse thread handle softwoods, plywood, and many hardwoods well at this length. In very dense hardwood, a pilot hole at the tip can make starting easier and reduce splitting near the entry point.
No. The zinc finish is intended for dry indoor use. For exterior work or pressure-treated lumber, a screw with a coating rated for those conditions is the right choice.
It uses a TX20 Torx bit. A correctly sized TX20 bit seats fully in the six-lobe recess and provides the best cam-out resistance during driving.
When the joint calls for more length and a clean flush finish matters, this Fastcap Powerhead delivers the auger point, flat head with nibs, and Torx drive in a size that handles the thicker assemblies most shop screws skip over.
Sold In: 1 Box