About Tapping Screws
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About Hex Head Screws and Bolts
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Flanged Rounded Head Screws for Wood
With a low-profile rounded head that’s flanged to sit flush for a finished appearance, these screws press threads into wood on cabinets, trim, molding, and light duty framing. Because they’re flanged, they distribute pressure across a wide surface, creating a tight hold and eliminating the need for a washer. The Torx drive has more points of contact than Phillips, slotted, and square drives, so you can apply extra force without worrying about slipping or stripping. These screws have a zinc plating to resist corrosion in wet environments. To prevent splitting, drill a pilot hole slightly smaller than the screw. Length is measured from under the flange.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Length | Diameter | Height | Flange Thickness | Drive Size | Approximate Threads per Inch | Threading | Minimum Thread Length | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||||
No. 8  | ||||||||||
| 2 3/4" | 0.43" | 0.09" | 0.05" | T15 | 15 | Partially Threaded | 1.811" | 100 | 000000000 | 000000 |
Steel Phillips Drilling Screws for Joining Wood to Metal
These screws speed installation by drilling, tapping, and fastening wood and metal in a single operation. Length is measured from the top of the head.
Screws with cutting wings drill a slightly larger hole in the wood to allow for expansion. The wings break off when they contact metal, so the screw can tap the remainder of the hole.
Zinc-plated steel screws resist corrosion in wet environments.
Corrosion-resistant-coated steel screws are a good choice for ACQ-treated (arsenic-free) lumber.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Screw Features | Drill Point Size | Drill Tip Lg. | For Metal Thick. | For Wood Thick. | Dia. | Ht. | Drive Size | Thread Size | Threading | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||||||
1/4" | |||||||||||||
| 2 3/4" | Cutting Wings | No. 4 | 1/2" | 0.11"-0.375" | 0.75"-1.75" | 0.472" | 0.153" | No. 3 | 1/4"-20 | Fully Threaded | 10 | 000000000 | 000000 |
Corrosion-Resistant-Coated Steel | |||||||||||||
No. 12 | |||||||||||||
| 2 3/4" | Cutting Wings | No. 4 | 1/2" | 0.13"-0.25" | 0.75"-1.625" | 0.438" | 0.16" | No. 3 | 12-24 | Fully Threaded | 10 | 000000000 | 00000 |
Rounded Head Screws for Particleboard and Fiberboard
Sharp, angled threads cut into particleboard, medium-density fiberboard (MDF), and hardboard such as masonite without splitting. Black-oxide and black-phosphate steel screws resist corrosion in dry environments. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | ||||||||||
No. 8 | ||||||||||
| 2 3/4" | 0.322" | 0.115" | No. 2 | 5/64" | 11 | Partially Threaded | 1.842" | 100 | 000000000 | 000000 |
Flat Head Screws for Particleboard and Fiberboard
Beveled under the head for use in countersunk holes. Sharp, angled threads cut into particleboard, medium-density fiberboard (MDF), and hardboard such as masonite without splitting. Length is measured from the top of the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Dia. Tolerance | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | |||||||||||
No. 8 | |||||||||||
| 2 3/4" | 0.332" | -0.04" | 0.1" | No. 2 | 5/64" | 11 | Partially Threaded | 1.84" | 50 | 000000000 | 000000 |
18-8 Stainless Steel Square-Drive Screws
for Softwood and Plastic-Wood Composites
18-8 stainless steel screws have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. They have a curved neck that sinks into material, so they sit flush with the surface. Also known as deck screws, they have a Type 17 auger point that penetrates softwood and plastic-wood composite decking material. They may be mildly magnetic. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Distortion-Free Screws for Plastic-Wood Composites
Threads change direction to cut into composites and push material back into the hole to prevent distorting the surface around the hole. Also known as trim-head deck screws, these have a small flat head and slender shank to reduce the risk of splitting. They have a Type 17 auger point to penetrate softwood and plastic-wood composite decking material. A Torx drive allows you to apply extra force with less slippage or damage to the recess. Made from 18-8 stainless steel, they have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. They may be mildly magnetic. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
No. 10 | ||||||||
| 2 3/4" | 0.266" | 0.11" | T20 | 3/32" | 13 | 25 | 000000000 | 000000 |
Drilling Screw-Style Hangers
Drill holes with the point on these hangers. Install with a special driver bit (sold separately).
Zinc-yellow-chromate-plated hangers are corrosion resistant in wet environments. Some hangers with a 7/16" head width can drill through steel as thick as 12 ga.; others can drill through sheet metal and wood.
For technical drawings and 3-D models, click on a part number.