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About Tapping Screws
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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 |