About Tapping Screws
More
Screws for Joining Sheet Metal to Wood
Able to penetrate overlapping sheets, these screws have a secure hold in wood. The hex head allows for a firm grip with a wrench, while a rubber washer provides a watertight seal. They're corrosion-resistant-coated steel to resist corrosion in wet environments and minimize reactions between dissimilar metals. Length is measured from under the washer.
For technical drawings and 3-D models, click on a part number.
Head | |||||||
|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Washer OD | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
Corrosion-Resistant-Coated Steel | |||||||
No. 14  | |||||||
| 1 1/2" | 0.313" | 0.15" | 0.593" | 10 | 25 | 000000000 | 00000 |
Screws for Hardwood
Also known as Type 17 auger point screws, these penetrate hardwood and reduce driving torque. They require a pilot hole to prevent splitting when used near an edge. They're beveled under the head for use in countersunk holes. Ribs underneath the head prevent loosening. Made from 18-8 stainless steel, they have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. Screws 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 | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
No. 6 | |||||||||
| 1 5/8" | 0.279" | 0.083" | No. 2 | 9 | Partially Threaded | 1.125" | 25 | 000000000 | 00000 |
No. 8 | |||||||||
| 1 1/4" | 0.311" | 0.088" | No. 2 | 8 | Partially Threaded | 0.838" | 25 | 000000000 | 0000 |
| 1 1/2" | 0.311" | 0.088" | No. 2 | 8 | Partially Threaded | 1" | 25 | 000000000 | 00000 |
| 1 5/8" | 0.311" | 0.088" | No. 2 | 15 | Partially Threaded | 1.083" | 25 | 000000000 | 0000 |
| 1 3/4" | 0.311" | 0.088" | No. 2 | 8 | Partially Threaded | 1.19" | 25 | 000000000 | 00000 |
| 2" | 0.311" | 0.088" | No. 2 | 15 | Partially Threaded | 1.333" | 25 | 000000000 | 00000 |
| 2 1/2" | 0.311" | 0.088" | No. 2 | 15 | Partially Threaded | 1.667" | 10 | 000000000 | 0000 |
| 3" | 0.311" | 0.088" | No. 2 | 8 | Partially Threaded | 2" | 10 | 000000000 | 0000 |
No. 10 | |||||||||
| 2 1/2" | 0.378" | 0.11" | No. 2 | 13 | Partially Threaded | 1.667" | 10 | 000000000 | 0000 |
| 3" | 0.378" | 0.11" | No. 2 | 13 | Partially Threaded | 2" | 10 | 000000000 | 0000 |
| 3 1/2" | 0.378" | 0.11" | No. 2 | 8 | Partially Threaded | 2.25" | 10 | 000000000 | 00000 |
| 4" | 0.378" | 0.11" | No. 2 | 8 | Partially Threaded | 2.625" | 5 | 000000000 | 0000 |
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.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||
No. 6 | ||||||||||
| 5/8" | 0.344" | 0.197" | No. 2 | 1/16" | 9 | Partially Threaded | 0.413" | 100 | 000000000 | 000000 |
| 3/4" | 0.344" | 0.197" | No. 2 | 1/16" | 9 | Partially Threaded | 0.495" | 100 | 000000000 | 00000 |
| 1" | 0.344" | 0.197" | No. 2 | 1/16" | 9 | Partially Threaded | 0.66" | 100 | 000000000 | 00000 |
| 1 1/4" | 0.344" | 0.197" | No. 2 | 1/16" | 9 | Partially Threaded | 0.825" | 100 | 000000000 | 00000 |
| 1 1/2" | 0.344" | 0.197" | No. 1 | 1/16" | 18 | Partially Threaded | 1" | 100 | 000000000 | 00000 |
| 1 5/8" | 0.344" | 0.197" | No. 2 | 1/16" | 9 | Partially Threaded | 1.073" | 100 | 000000000 | 00000 |
| 2" | 0.344" | 0.197" | No. 2 | 1/16" | 18 | Partially Threaded | 1 1/4" | 100 | 000000000 | 00000 |
No. 8 | ||||||||||
| 3/4" | 0.344" | 0.192" | No. 2 | 5/64" | 8 | Partially Threaded | 0.495" | 100 | 000000000 | 00000 |
| 1" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 3/4" | 100 | 000000000 | 0000 |
| 1 1/4" | 0.344" | 0.192" | No. 2 | 5/64" | 8 | Partially Threaded | 0.825" | 100 | 000000000 | 00000 |
| 1 1/2" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 1" | 100 | 000000000 | 00000 |
| 1 5/8" | 0.344" | 0.192" | No. 2 | 5/64" | 8 | Partially Threaded | 1.073" | 50 | 000000000 | 00000 |
| 1 3/4" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 1 3/16" | 100 | 000000000 | 00000 |
| 2" | 0.344" | 0.192" | No. 2 | 5/64" | 8 | Partially Threaded | 1.32" | 50 | 000000000 | 00000 |
| 2 1/2" | 0.344" | 0.192" | No. 2 | 5/64" | 8 | Partially Threaded | 1.65" | 50 | 000000000 | 00000 |
| 2 3/4" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 1 27/32" | 50 | 000000000 | 00000 |
| 3" | 0.344" | 0.192" | No. 2 | 5/64" | 8 | Partially Threaded | 1.98" | 50 | 000000000 | 00000 |
No. 10 | ||||||||||
| 1" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 0.66" | 100 | 000000000 | 00000 |
| 1 1/4" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 0.825" | 100 | 000000000 | 00000 |
| 1 1/2" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 0.99" | 50 | 000000000 | 00000 |
| 1 5/8" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 1 1/8" | 50 | 000000000 | 00000 |
| 1 3/4" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 1.155" | 50 | 000000000 | 00000 |
| 2" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 1.32" | 50 | 000000000 | 00000 |
| 2 1/4" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 1 1/2" | 50 | 000000000 | 00000 |
| 2 1/2" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 1.65" | 25 | 000000000 | 00000 |
| 2 3/4" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 1 27/32" | 25 | 000000000 | 0000 |
| 3" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 1.98" | 25 | 000000000 | 00000 |
| 3 3/4" | 0.344" | 0.189" | No. 2 | 3/32" | 8 | Partially Threaded | 2.475" | 25 | 000000000 | 00000 |
| 4" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 2 3/4" | 25 | 000000000 | 00000 |
No. 12 | ||||||||||
| 2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 1 1/4" | 25 | 000000000 | 0000 |
| 2 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 7 | Partially Threaded | 1.65" | 25 | 000000000 | 00000 |
| 3 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 7 | Partially Threaded | 2.31" | 10 | 000000000 | 00000 |
| 4" | 0.43" | 0.203" | No. 3 | 7/64" | 7 | Partially Threaded | 2.64" | 10 | 000000000 | 00000 |
| 4 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 7 | Partially Threaded | 2.97" | 10 | 000000000 | 00000 |
| 5 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 3.688" | 10 | 000000000 | 0000 |
| 6" | 0.43" | 0.203" | No. 3 | 7/64" | 7 | Partially Threaded | 3.96" | 10 | 000000000 | 00000 |
No. 14 | ||||||||||
| 2" | 0.43" | 0.25" | No. 3 | 7/64" | 10 | Partially Threaded | 1 1/4" | 25 | 000000000 | 00000 |
| 2 1/2" | 0.43" | 0.25" | No. 3 | 7/64" | 10 | Partially Threaded | 1 3/4" | 10 | 000000000 | 0000 |
| 3" | 0.43" | 0.25" | No. 3 | 7/64" | 10 | Partially Threaded | 2" | 10 | 000000000 | 0000 |
| 3 1/2" | 0.43" | 0.25" | No. 3 | 7/64" | 7 | Partially Threaded | 2.31" | 10 | 000000000 | 00000 |
| 4" | 0.43" | 0.25" | No. 3 | 7/64" | 7 | Partially Threaded | 2.64" | 10 | 000000000 | 00000 |
| 4 1/2" | 0.43" | 0.25" | No. 3 | 7/64" | 10 | Partially Threaded | 2 11/16" | 10 | 000000000 | 00000 |
| 5" | 0.43" | 0.25" | No. 3 | 7/64" | 7 | Partially Threaded | 3.3" | 10 | 000000000 | 00000 |
| 6" | 0.43" | 0.25" | No. 3 | 7/64" | 10 | Partially Threaded | 4" | 5 | 000000000 | 0000 |
Super-Corrosion-Resistant 316 Stainless Steel Square-Drive
Screws for Softwood and Plastic-Wood Composites
More corrosion resistant than 18-8 stainless steel screws, these have excellent resistance to chemicals and salt water 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.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||||
No. 6 | ||||||||||
| 1 1/4" | 0.344" | 0.197" | No. 1 | 1/16" | 18 | Partially Threaded | 0.825" | 50 | 000000000 | 00000 |
| 1 5/8" | 0.344" | 0.197" | No. 1 | 1/16" | 18 | Partially Threaded | 1 1/8" | 50 | 000000000 | 0000 |
| 2" | 0.344" | 0.197" | No. 1 | 1/16" | 18 | Partially Threaded | 1 1/4" | 50 | 000000000 | 0000 |
No. 8 | ||||||||||
| 1 1/4" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 0.825" | 50 | 000000000 | 00000 |
| 1 1/2" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 1" | 50 | 000000000 | 0000 |
| 1 5/8" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 1.073" | 50 | 000000000 | 00000 |
| 2" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 1.32" | 50 | 000000000 | 00000 |
| 2 1/4" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 1 1/2" | 50 | 000000000 | 00000 |
| 3" | 0.344" | 0.192" | No. 2 | 5/64" | 15 | Partially Threaded | 2" | 25 | 000000000 | 0000 |
No. 10 | ||||||||||
| 1 5/8" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 1 1/8" | 25 | 000000000 | 0000 |
| 2 1/2" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 1.65" | 25 | 000000000 | 00000 |
| 3" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 1.98" | 25 | 000000000 | 00000 |
| 3 1/2" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 2.31" | 25 | 000000000 | 00000 |
| 4" | 0.344" | 0.189" | No. 2 | 3/32" | 13 | Partially Threaded | 2 3/4" | 10 | 000000000 | 0000 |
No. 12 | ||||||||||
| 2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 1 1/4" | 10 | 000000000 | 0000 |
| 2 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 1.65" | 25 | 000000000 | 00000 |
| 3" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 1.98" | 25 | 000000000 | 00000 |
| 3 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 2.31" | 10 | 000000000 | 00000 |
| 4" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 2.64" | 10 | 000000000 | 0000 |
| 4 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 2.97" | 10 | 000000000 | 00000 |
| 5" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 3.3" | 10 | 000000000 | 00000 |
No. 14 | ||||||||||
| 3" | 0.43" | 1/4" | No. 3 | 7/64" | 10 | Partially Threaded | 2" | 10 | 000000000 | 0000 |
| 4" | 0.43" | 1/4" | No. 3 | 7/64" | 10 | Partially Threaded | 2 3/4" | 5 | 000000000 | 0000 |
| 5" | 0.43" | 1/4" | No. 3 | 7/64" | 10 | Partially Threaded | 3 1/4" | 5 | 000000000 | 0000 |
| 6" | 0.43" | 1/4" | No. 3 | 7/64" | 10 | Partially Threaded | 4" | 5 | 000000000 | 0000 |
18-8 Stainless Steel Thread-Cutting Small-Head
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. Also known as trim-head deck screws, they have a small flat head and slender shank to reduce the risk of splitting. The Type 17 auger point and narrow body penetrate softwood and plastic-wood composite decking material. They cut threads into drilled holes as they’re turned, so they require less driving torque and cause less stress on material than thread-forming screws. Screws 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 | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||
No. 7 | ||||||||||
| 1" | 0.23" | 0.125" | No. 1 | 1/16" | 10 | Partially Threaded | 1/2" | 50 | 000000000 | 000000 |
| 1 5/8" | 0.23" | 0.125" | No. 1 | 1/16" | 10 | Partially Threaded | 13/16" | 50 | 000000000 | 00000 |
| 2" | 0.23" | 0.125" | No. 1 | 1/16" | 10 | Partially Threaded | 1" | 50 | 000000000 | 00000 |
| 2 1/4" | 0.23" | 0.125" | No. 1 | 1/16" | 10 | Partially Threaded | 1 1/8" | 50 | 000000000 | 00000 |
| 2 1/2" | 0.23" | 0.125" | No. 1 | 1/16" | 10 | Partially Threaded | 1 1/4" | 50 | 000000000 | 00000 |
| 3" | 0.23" | 0.125" | No. 1 | 1/16" | 10 | Partially Threaded | 1 1/2" | 25 | 000000000 | 00000 |
No. 9 | ||||||||||
| 4" | 0.25" | 0.125" | No. 2 | 5/64" | 14 | Partially Threaded | 2" | 10 | 000000000 | 0000 |
Super-Corrosion-Resistant 316 Stainless Steel Thread-Cutting
Small-Head Screws for Softwood and Plastic-Wood Composites
More corrosion resistant than 18-8 stainless steel screws, these have excellent resistance to chemicals and salt water and are a good choice for ACQ-treated (arsenic-free) lumber. Also known as trim-head deck screws, they have a small flat head and slender shank to reduce the risk of splitting. The Type 17 auger point and narrow body penetrate softwood and plastic-wood composite decking material. They cut threads into drilled holes as they’re turned, so they require less driving torque and cause less stress on material than thread-forming screws. Screws 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 | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||||
No. 7 | ||||||||||
| 1 5/8" | 0.23" | 0.125" | No. 1 | 1/16" | 16 | Partially Threaded | 13/16" | 50 | 000000000 | 000000 |
| 2 1/4" | 0.23" | 0.125" | No. 1 | 1/16" | 16 | Partially Threaded | 1 1/8" | 25 | 000000000 | 00000 |
| 3" | 0.23" | 0.125" | No. 1 | 1/16" | 16 | Partially Threaded | 1 1/2" | 25 | 000000000 | 00000 |
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.
Sealing Screws for Softwood and Plastic-Wood Composites
The neoprene-backed washer seals out contaminants. Also known as trim-head deck screws, they 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. Made from 18-8 stainless steel, they have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. Screws 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 | Washer | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | OD | Thick. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||||
No. 7 | ||||||||||||
| 1" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 7/8" | 25 | 000000000 | 000000 |
| 1 5/8" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 1 1/8" | 25 | 000000000 | 00000 |
| 2 1/4" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 1 1/4" | 10 | 000000000 | 00000 |
| 3" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 2" | 10 | 000000000 | 00000 |