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About Tapping Screws
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Quick-Install Thread-Cutting Screws for Soft Metal

A wide cutting slot provides excellent chip clearing and low driving torque in soft metal such as brass. Made from 410 stainless steel, these screws are strong, wear resistant, and mildly chemical resistant. Not for use with aluminum. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
---|---|---|---|---|---|---|---|---|---|
Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Tapping Screw Type | For Use In | Pkg. Qty. | Pkg. | |
410 Stainless Steel | |||||||||
4-40 | |||||||||
1/4" | 0.219" | 0.08" | No. 1 | No. 41 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 00000 |
3/8" | 0.219" | 0.08" | No. 1 | No. 41 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 0000 |
1/2" | 0.219" | 0.08" | No. 1 | No. 41 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 0000 |
6-32 | |||||||||
1/4" | 0.27" | 0.097" | No. 2 | No. 31 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 0000 |
3/8" | 0.27" | 0.097" | No. 2 | No. 31 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 0000 |
1/2" | 0.27" | 0.097" | No. 2 | No. 31 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 0000 |
8-32 | |||||||||
1/4" | 0.322" | 0.115" | No. 2 | No. 26 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 0000 |
3/8" | 0.322" | 0.115" | No. 2 | No. 26 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 00000 |
1/2" | 0.322" | 0.115" | No. 2 | No. 26 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 00000 |
10-24 | |||||||||
3/8" | 0.373" | 0.133" | No. 2 | No. 17 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 00000 |
1/2" | 0.373" | 0.133" | No. 2 | No. 17 | 23/T | Brass, Cast Iron, Sheet Metal | 50 | 000000000 | 0000 |
3/4" | 0.373" | 0.133" | No. 2 | No. 17 | 23/T | Brass, Cast Iron, Sheet Metal | 50 | 000000000 | 00000 |
10-32 | |||||||||
3/8" | 0.373" | 0.133" | No. 2 | No. 17 | 23/T | Brass, Cast Iron, Sheet Metal | 100 | 000000000 | 00000 |
1/2" | 0.373" | 0.133" | No. 2 | No. 17 | 23/T | Brass, Cast Iron, Sheet Metal | 50 | 000000000 | 0000 |
3/4" | 0.373" | 0.133" | No. 2 | No. 17 | 23/T | Brass, Cast Iron, Sheet Metal | 50 | 000000000 | 00000 |
1/4"-20 | |||||||||
1/2" | 0.492" | 0.175" | No. 3 | No. 1 | 23/T | Brass, Cast Iron, Sheet Metal | 50 | 000000000 | 00000 |
3/4" | 0.492" | 0.175" | No. 3 | No. 1 | 23/T | Brass, Cast Iron, Sheet Metal | 25 | 000000000 | 00000 |
1" | 0.492" | 0.175" | No. 3 | No. 1 | 23/T | Brass, Cast Iron, Sheet Metal | 25 | 000000000 | 00000 |