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About Tapping Screws
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18-8 Stainless Steel Flat Head Screws
for Plywood and Oriented Strand Board
18-8 stainless steel screws have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. They are beveled under the head for use in countersunk holes. They penetrate plywood and oriented strand board (OSB) without splitting. Threads are serrated for lower driving torque. 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 | Drive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Size | Style | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||||
No. 9 | |||||||||||
| 1 1/2" | 0.346" | 0.143" | No. 2 | Square/Phillips | 5/64" | 14 | Partially Threaded | 3/4" | 50 | 000000000 | 00000 |
| 2" | 0.346" | 0.143" | No. 2 | Square/Phillips | 5/64" | 14 | Partially Threaded | 3/4" | 50 | 000000000 | 00000 |
| 2 1/2" | 0.346" | 0.143" | No. 2 | Square/Phillips | 5/64" | 14 | Partially Threaded | 3/4" | 25 | 000000000 | 0000 |
No. 10 | |||||||||||
| 2 1/2" | 0.348" | 0.134" | No. 2 | Square/Phillips | 3/32" | 13 | Partially Threaded | 3/4" | 25 | 000000000 | 00000 |
| 3" | 0.348" | 0.134" | No. 2 | Square/Phillips | 3/32" | 13 | Partially Threaded | 3/4" | 25 | 000000000 | 00000 |
Steel Rounded Head Screws for
Plywood and Oriented Strand Board
These screws are zinc plated to resist corrosion in wet environments. They penetrate plywood and oriented strand board (OSB) without splitting. Threads are serrated for lower driving torque. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | Drive | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Size | Style | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
No. 6 | |||||||||
| 5/8" | 0.26" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 00000 |
| 3/4" | 0.26" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 0000 |
No. 8 | |||||||||
| 3/4" | 0.33" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 1" | 0.33" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.33" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 2" | 0.33" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 00000 |
No. 10 | |||||||||
| 5/8" | 0.37" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 0000 |
| 3/4" | 0.37" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 00000 |
| 1" | 0.37" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 00000 |
Steel Flat Head Screws for Plywood
and Oriented Strand Board
These steel screws are zinc plated to resist corrosion in wet environments. They are beveled under the head for use in countersunk holes. They penetrate plywood and oriented strand board (OSB) without splitting. Threads are serrated for lower driving torque. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | Drive | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Size | Style | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
No. 6 | |||||||||
| 1/2" | 0.3" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 00000 |
| 5/8" | 0.3" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 0000 |
| 3/4" | 0.3" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 0000 |
| 1" | 0.3" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.3" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.3" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 0000 |
| 2" | 0.3" | 0.1" | No. 1/No. 2 | Square/Phillips | 1/16" | 18 | 100 | 000000000 | 0000 |
No. 8 | |||||||||
| 5/8" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 3/4" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 1" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 1 3/4" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 2" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 0000 |
| 2 1/2" | 0.3" | 0.11" | No. 2/No. 2 | Square/Phillips | 5/64" | 15 | 100 | 000000000 | 00000 |
No. 10 | |||||||||
| 3/4" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 0000 |
| 1" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 00000 |
| 2" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 00000 |
| 2 1/2" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 100 | 000000000 | 00000 |
| 3" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 50 | 000000000 | 0000 |
| 3 1/2" | 0.4" | 0.13" | No. 2/No. 2 | Square/Phillips | 3/32" | 13 | 50 | 000000000 | 0000 |