Clear All
System of Measurement System of Measurement |
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Screw Size Screw Size |
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Head Type Head Type |
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![]() | Flat |
Drive Style Drive Style |
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For Use In For Use In |
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Thread Size Thread Size |
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Tapping Method Tapping Method |
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![]() | Thread Forming |
Tip Type Tip Type |
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![]() | Blunt |
Threading Threading |
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![]() | Partially Threaded |
![]() | Fully Threaded |
Material Material |
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Drive Size Drive Size | Show |
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Finish Finish |
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Drill Bit Decimal Size Equivalent Drill Bit DecimalSize Equivalent |
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Drill Bit Size Drill Bit Size |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Flat Head Profile Flat Head Profile |
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![]() | Standard |
Thread Type Thread Type |
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About Tapping Screws
More
Thread-Forming Screws for Joining Wood to Metal

Thread-forming screws press threads into drilled holes for a tight vibration-resistant assembly. All are beveled under the head for use in countersunk holes. A Torx drive allows you to apply extra force with less slippage or damage to the recess. They're black-phosphate steel to resist corrosion in dry environments. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
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Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
Black-Phosphate Steel | |||||||||
5/16"-18 | |||||||||
1 3/4" | 0.6" | 0.191" | T40 | H | Fully Threaded | __ | 25 | 000000000 | 000000 |
2" | 0.6" | 0.191" | T40 | H | Fully Threaded | __ | 25 | 000000000 | 00000 |
2 1/4" | 0.6" | 0.191" | T40 | H | Partially Threaded | 1 1/2" | 10 | 000000000 | 0000 |
2 1/2" | 0.6" | 0.191" | T40 | H | Partially Threaded | 1 1/2" | 25 | 000000000 | 00000 |
3" | 0.6" | 0.191" | T40 | H | Partially Threaded | 1 1/2" | 10 | 000000000 | 00000 |