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 |
Steel Thread-Cutting Small-Head Screws for
Softwood and Plastic-Wood Composites
Because these steel screws cut threads into drilled holes as they’re turned, they require less driving torque and cause less stress on material than thread-forming screws. Also known as trim-head deck screws, they have a small flat head and slender shank to reduce the risk of splitting boards. Their thin head also means they won't stick out of decking, trim, and other finished surfaces. With a corrosion-resistant coating, these screws resist up to 1,500 hours of salt spray. They're green, so they blend in with most treated wood.
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. | |
Corrosion-Resistant-Coated Steel | ||||||||||
No. 8 | ||||||||||
| 2" | 0.256" | 0.125" | T-15 | 1/8" | 10 | Partially Threaded | 1.4" | 50 | 000000000 | 000000 |
| 2 1/2" | 0.256" | 0.125" | T-15 | 1/8" | 10 | Partially Threaded | 1.67" | 50 | 000000000 | 00000 |
| 3" | 0.256" | 0.125" | T-15 | 1/8" | 10 | Partially Threaded | 2.07" | 25 | 000000000 | 00000 |
| 3 1/2" | 0.256" | 0.125" | T-15 | 1/8" | 10 | Partially Threaded | 2.42" | 25 | 000000000 | 00000 |
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 | 00000 |
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 |