Screw Features Screw Features |
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Sealing | With Washer |
For Use In For Use In |
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Washer Material Washer Material |
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System of Measurement System of Measurement |
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Tip Type Tip Type |
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![]() | Pointed |
Drive Style Drive Style |
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External Hex | Square |
Tapping Method Tapping Method |
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Thread Forming | Thread Cutting |
Threading Threading |
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![]() | Partially Threaded |
![]() | Fully Threaded |
Material Material |
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Finish Finish |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Tapping Screws
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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 | |||||||||||
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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 | 1/2" | 25 | 000000000 | 000000 |
1 5/8" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 13/16" | 25 | 000000000 | 00000 |
2 1/4" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 2 1/8" | 10 | 000000000 | 00000 |
3" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 1 1/2" | 10 | 000000000 | 00000 |
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 ultra-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 | ||||||||
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Lg. | Wd. | Ht. | Washer OD | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
Ultra-Corrosion-Resistant Coated Steel | ||||||||
No. 9 | ||||||||
1" | 0.25" | 0.16" | 0.472" | __ | 15 | 100 | 000000000 | 000000 |
1 1/2" | 0.25" | 0.16" | 0.472" | __ | 15 | 50 | 000000000 | 0000 |
2" | 0.25" | 0.16" | 0.472" | __ | 15 | 50 | 000000000 | 0000 |
2 1/2" | 0.25" | 0.16" | 0.472" | __ | 15 | 50 | 000000000 | 00000 |
3" | 0.25" | 0.16" | 0.472" | __ | 15 | 25 | 000000000 | 0000 |
No. 10 | ||||||||
1" | 0.25" | 0.169" | 0.45" | No. 21 | 16 | 100 | 000000000 | 00000 |
1 1/2" | 0.25" | 0.169" | 0.45" | No. 21 | 12 | 100 | 000000000 | 00000 |
2" | 0.25" | 0.169" | 0.45" | No. 21 | 12 | 50 | 000000000 | 00000 |
2 1/2" | 0.25" | 0.169" | 0.45" | No. 21 | 12 | 50 | 000000000 | 00000 |
3" | 0.25" | 0.169" | 0.45" | No. 21 | 12 | 50 | 000000000 | 00000 |
No. 14 | ||||||||
1 1/2" | 0.313" | 0.15" | 0.593" | __ | 10 | 25 | 000000000 | 0000 |