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About Tapping Screws
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Compare drilling, pointed, thread-forming, and thread-cutting tips to find the best choice for your material.
Tri-Wing® Rounded Head Screws for Sheet Metal
These screws require a Tri-Wing® driver for installation and removal. Made from 18-8 stainless steel, they are chemical resistant and may be mildly magnetic. They penetrate 0.025" and thinner sheet metal. Length is measured from under the head.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel  | ||||||||
No. 6 | ||||||||
| 1/2" | 0.27" | 0.082" | No. 3 | No. 32 | 18 | 50 | 000000000 | 000000 |
| 3/4" | 0.27" | 0.082" | No. 3 | No. 32 | 18 | 50 | 000000000 | 00000 |
| 1" | 0.27" | 0.082" | No. 3 | No. 32 | 18 | 25 | 000000000 | 0000 |
No. 8 | ||||||||
| 1/2" | 0.322" | 0.096" | No. 4 | No. 29 | 15 | 50 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.096" | No. 4 | No. 29 | 15 | 50 | 000000000 | 00000 |
| 1" | 0.322" | 0.096" | No. 4 | No. 29 | 15 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.322" | 0.096" | No. 4 | No. 29 | 15 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.322" | 0.096" | No. 4 | No. 29 | 15 | 25 | 000000000 | 00000 |
No. 10 | ||||||||
| 1/2" | 0.373" | 0.11" | No. 5 | No. 21 | 12 | 50 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.11" | No. 5 | No. 21 | 12 | 25 | 000000000 | 0000 |
| 1" | 0.373" | 0.11" | No. 5 | No. 21 | 12 | 25 | 000000000 | 0000 |