About Tapping Screws
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Strip-Resistant Drilling Screws for Metal


Serrations under the head act as a brake to prevent overtightening and damaging threads. The flange reduces the risk of crushing thin metal. They save you time and effort by drilling their own holes and fastening in a single operation. A hex head provides a larger gripping area for installation with a wrench or socket driver. Length is measured from under the flange. Head height includes the flange.
Screws with 0.15" head height are used in low-clearance applications.
Zinc-plated steel screws resist corrosion in wet environments.
Ultra-corrosion-resistant-coated steel screws are more corrosion resistant than zinc-plated screws.
For technical drawings and 3-D models, click on a part number.
Drill Tip | Head | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Type | Lg. | Max. Drilling Thick. | Wd. | Ht. | Flange Dia. | Approximate Threads per Inch | For Use In | Pkg. Qty. | Pkg. | |
External Hex—Zinc-Plated Steel | |||||||||||
No. 8 | |||||||||||
1/2" | No. 2 | 3/16" | 0.098" | 0.25" | 0.195" | 0.375" | 18 | Steel, Sheet Metal | 100 | 000000000 | 000000 |
9/16" | No. 2 | 9/64" | 0.098" | 0.25" | 0.15" | 0.348" | 18 | Steel, Sheet Metal | 25 | 000000000 | 00000 |
3/4" | No. 2 | 3/16" | 0.098" | 0.25" | 0.195" | 0.375" | 18 | Steel, Sheet Metal | 100 | 000000000 | 0000 |
1" | No. 2 | 3/16" | 0.098" | 0.25" | 0.195" | 0.375" | 18 | Steel, Sheet Metal | 100 | 000000000 | 00000 |
No. 10 | |||||||||||
3/4" | No. 3 | 1/4" | 0.15" | 0.313" | 0.229" | 0.465" | 16 | Steel, Sheet Metal | 100 | 000000000 | 00000 |
1" | No. 3 | 1/4" | 0.15" | 0.313" | 0.229" | 0.465" | 16 | Steel, Sheet Metal | 100 | 000000000 | 00000 |
No. 12 | |||||||||||
3/4" | No. 3 | 9/32" | 0.187" | 0.313" | 0.26" | 0.52" | 14 | Steel, Sheet Metal | 50 | 000000000 | 0000 |
1" | No. 3 | 9/32" | 0.187" | 0.313" | 0.26" | 0.52" | 14 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
1/4" | |||||||||||
3/4" | No. 3 | 5/16" | 0.21" | 0.375" | 0.3" | 0.595" | 14 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
1" | No. 3 | 5/16" | 0.21" | 0.375" | 0.3" | 0.595" | 14 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
1 1/4" | No. 3 | 5/16" | 0.21" | 0.375" | 0.3" | 0.595" | 14 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
External Hex—Ultra-Corrosion-Resistant-Coated Steel | |||||||||||
1/4" | |||||||||||
3/4" | No. 3 | 13/32" | 0.21" | 0.438" | 0.23" | 0.575" | 14 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
External Hex—Corrosion-Resistant-Coated Steel | |||||||||||
1/4" | |||||||||||
1" | No. 3 | 5/16" | 0.21" | 0.438" | 0.23" | 0.61" | 14 | Steel, Sheet Metal | 50 | 000000000 | 00000 |