Screws

Wood screws, machine screws, self-tapping, and specialty screws.

Wood Screw

General-purpose screws for fastening wood to wood. Feature coarse threads that grip wood fibers and tapered points for easy starting.

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Drywall Screw

Specialized screws for attaching drywall to studs. Bugle heads sit flush without tearing the paper face.

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Machine Screw

Fasteners with uniform machine threads for tapped holes or nuts. Used in electronics and precision applications.

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Sheet Metal Screw

Self-tapping screws with sharp threads designed for thin metal sheets. Create their own mating threads without pre-tapping.

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Self-Drilling Screw

Screws with drill-bit tips that eliminate the need for pre-drilling. Drill and tap in one operation for faster installation.

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Deck Screw

Corrosion-resistant screws designed for outdoor deck construction. Feature bugle heads and aggressive threads for hardwoods.

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Construction Screw

Heavy-duty screws replacing lag bolts for structural wood connections. Feature aggressive threads and no pre-drilling requirement.

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Set Screw

Headless screws used to secure pulleys, gears, or collars to shafts. Tightened with hex key into tapped holes.

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Socket Head Cap Screw

High-strength precision fasteners with cylindrical heads and internal hex drives. Used in machine building and precision equipment.

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Button Head Cap Screw

Low-profile socket head screws with domed heads. Used where clearance is limited or appearance matters.

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Flat Head Socket Cap Screw

Countersunk socket head screws that sit flush with surface. Combine flush appearance with hex drive strength.

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Concrete Screw

Hardened screws that thread directly into concrete, brick, or block without anchors. Require pre-drilled holes.

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Chipboard Screw

Single-thread screws optimized for particleboard and MDF. Deep threads and sharp points prevent splitting.

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Confirmat Screw

European-style furniture screws with large diameter and deep threads for strong joints in particleboard and MDF.

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Pocket Hole Screw

Self-tapping screws designed for pocket hole joinery. Feature washer heads and modified threads for strong wood-to-wood joints.

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Trim Head Screw

Small-headed screws that minimize visible fastener presence. Used for trim and finish carpentry where appearance matters.

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Thread Cutting Screw

Machine-thread screws with cutting edges that create threads in pre-drilled holes. Remove material like a tap.

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Thread Forming Screw

Screws that cold-form threads in ductile materials without cutting. Displace material rather than removing it.

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SEMS Screw

Machine screws pre-assembled with captive washers. Eliminate loose washers and speed up assembly.

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Shoulder Screw

Precision fasteners with an unthreaded cylindrical shoulder between head and threads. Used as pivots and guides.

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Weld Screw

Screws designed to be resistance-welded to sheet metal. Feature projections or flat spots for consistent welds.

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Security Screw

Tamper-resistant screws requiring special tools for installation and removal. Deter unauthorized access.

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Thumb Screw

Screws with knurled or winged heads for hand tightening without tools. Used where frequent adjustment is needed.

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Captive Screw

Screws retained in panels even when loosened. Prevent loss in field service and eliminate dropped hardware.

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Hanger Bolt

Headless fasteners with wood screw threads on one end and machine threads on the other. For hanging fixtures from wood.

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Drive Screw

Screws designed to be driven with a hammer rather than rotated. Permanent installation for nameplates and panels.

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Drywall Anchor Screw

Coarse-threaded screws designed for use with plastic wall anchors or self-drilling drywall anchors.

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Frequently Asked Questions

What is the difference between wood screws and machine screws?
Wood screws have a tapered shank with coarse threads designed to cut into wood fibers. Machine screws have a uniform diameter with finer threads and require a pre-tapped hole or nut. Wood screws are self-tapping in wood; machine screws are used in metal, plastic, or other materials with matching threaded holes.
What does the screw gauge number mean?
Screw gauge refers to the diameter of the screw shaft. Common gauges range from #2 (0.086") to #14 (0.242"). Higher numbers indicate larger diameters. For screws 1/4" and above, the diameter is stated as a fraction rather than a gauge number.
When should I use self-tapping vs self-drilling screws?
Self-tapping screws create their own threads in a pre-drilled pilot hole. Self-drilling screws have a drill-bit tip that eliminates the need for a pilot hole entirely. Use self-tapping screws in softer materials like wood or plastic. Use self-drilling screws for sheet metal or steel framing where drilling and fastening in one step saves time.
What drive type is strongest: Phillips, Torx, or Robertson?
Robertson (square) and Torx (star) drives resist cam-out better than Phillips, allowing more torque transfer. Torx provides the highest torque capacity due to its six-lobe contact area. Phillips was intentionally designed to cam out at a set torque to prevent over-tightening, which is a disadvantage when maximum clamping force is needed.
What screw material should I use outdoors?
Stainless steel (304 or 316) resists corrosion in most outdoor environments. For pressure-treated lumber, use screws rated ACQ-compatible — typically stainless steel or specially coated screws. Avoid plain steel or zinc-plated screws outdoors, as they corrode rapidly. Silicon bronze is preferred for marine applications.