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About Tapping Screws
More
Steel Rounded Head Thread-Forming Screws for Brittle Plastic
Zinc-Plated Steel
Black Zinc-Plated Steel
These steel screws have alternating high and low threads to minimize cracking and splitting in brittle material such as phenolic and glass-filled plastic. Length is measured from under the head. Screws meet ASME B18.6.3 dimensional standards.
All of these screws are zinc plated to protect the steel from corroding in wet environments. Black zinc-plated screws blend in with dark surfaces and reduce glare.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Tapping Screw Type | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||||
No. 2 | ||||||||||
| 3/16" | 0.167" | 0.062" | No. 1 | No. 50 | 32 | DST | ASME B18.6.3 | 50 | 000000000 | 000000 |
| 1/4" | 0.167" | 0.062" | No. 1 | No. 50 | 32 | DST | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 5/16" | 0.167" | 0.062" | No. 1 | No. 50 | 32 | DST | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 3/8" | 0.167" | 0.062" | No. 1 | No. 50 | 32 | DST | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 1/2" | 0.167" | 0.062" | No. 1 | No. 50 | 32 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
No. 3 | ||||||||||
| 1/4" | 0.167" | 0.062" | No. 1 | 5/64" | 28 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/8" | 0.167" | 0.062" | No. 1 | 5/64" | 28 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | 0.167" | 0.062" | No. 1 | 5/64" | 28 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
No. 4 | ||||||||||
| 1/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 50 | 000000000 | 0000 |
| 3/16" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 5/16" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 3/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 1/2" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 50 | 000000000 | 0000 |
| 5/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 7/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 1 1/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
No. 5 | ||||||||||
| 1/4" | 0.219" | 0.08" | No. 1 | No. 39 | 20 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 5/16" | 0.219" | 0.08" | No. 1 | No. 39 | 20 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/8" | 0.219" | 0.08" | No. 1 | No. 39 | 20 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | 0.219" | 0.08" | No. 1 | No. 39 | 20 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | 0.219" | 0.08" | No. 1 | No. 39 | 20 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
No. 6 | ||||||||||
| 1/4" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 5/16" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 50 | 000000000 | 0000 |
| 3/8" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 50 | 000000000 | 0000 |
| 7/16" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1/2" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 5/8" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 7/8" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 1 3/4" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 2" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
No. 7 | ||||||||||
| 1/2" | 0.27" | 0.097" | No. 2 | 1/8" | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1" | 0.27" | 0.097" | No. 2 | 1/8" | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
No. 8 | ||||||||||
| 1/4" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 50 | 000000000 | 0000 |
| 5/16" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 3/8" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 5/8" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 7/8" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1 3/4" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 2" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
No. 10 | ||||||||||
| 3/8" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 7/8" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 1" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 1 1/2" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 2" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 2 1/4" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
No. 12 | ||||||||||
| 1/2" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 5/8" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1 1/4" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1 1/2" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
No. 14 | ||||||||||
| 3/8" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1/2" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 5/8" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 3/4" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 1 1/4" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 1 1/2" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 2" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
Black Zinc-Plated Steel | ||||||||||
No. 4 | ||||||||||
| 1/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 5/16" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 3/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1/2" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 5/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
No. 6 | ||||||||||
| 3/8" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1/2" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 5/8" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 3/4" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1 1/4" | 0.254" | 0.097" | No. 2 | No. 35 | 19 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
No. 8 | ||||||||||
| 3/8" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 0000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 5/8" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1 1/2" | 0.27" | 0.097" | No. 2 | No. 30 | 18 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
No. 10 | ||||||||||
| 3/8" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 1 1/4" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 1 1/2" | 0.322" | 0.115" | No. 2 | No. 27 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
No. 12 | ||||||||||
| 1/2" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 1 1/4" | 0.373" | 0.133" | No. 2 | No. 19 | 16 | DST | ASME B18.6.3 | 5 | 000000000 | 0000 |
No. 14 | ||||||||||
| 1/2" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 1" | 0.492" | 0.175" | No. 3 | No. 7 | 15 | DST | ASME B18.6.3 | 5 | 000000000 | 0000 |
18-8 Stainless Steel Rounded Head Thread-Forming Screws for Brittle Plastic
18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. Alternating high and low threads minimize cracking and splitting in brittle material such as phenolic and glass-filled plastic. 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 | Approximate Threads per Inch | Tapping Screw Type | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
No. 2 | |||||||||
| 1/4" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | DST | 100 | 000000000 | 00000 |
| 5/16" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | DST | 100 | 000000000 | 0000 |
| 3/8" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | DST | 100 | 000000000 | 0000 |
| 1/2" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | DST | 100 | 000000000 | 0000 |
No. 4 | |||||||||
| 1/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 5/16" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 3/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 1/2" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 3/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 1" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
No. 6 | |||||||||
| 1/4" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 5/16" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 3/8" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 1/2" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 5/8" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 3/4" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 1" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 1 1/4" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 00000 |
| 1 1/2" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 00000 |
No. 8 | |||||||||
| 5/16" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 3/8" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 0000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 0000 |
| 5/8" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 1" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 1 1/4" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 1 1/2" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
No. 10 | |||||||||
| 3/8" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
| 1" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
No. 12 | |||||||||
| 1/2" | 0.373" | 0.133" | No. 3 | 3/16" | 16 | DST | 50 | 000000000 | 0000 |
| 3/4" | 0.373" | 0.133" | No. 3 | 3/16" | 16 | DST | 50 | 000000000 | 0000 |
| 1" | 0.373" | 0.133" | No. 3 | 3/16" | 16 | DST | 50 | 000000000 | 00000 |
No. 14 | |||||||||
| 1/2" | 0.492" | 0.175" | No. 3 | 5.5 mm | 15 | DST | 50 | 000000000 | 00000 |
| 3/4" | 0.492" | 0.175" | No. 3 | 5.5 mm | 15 | DST | 50 | 000000000 | 00000 |
| 1" | 0.492" | 0.175" | No. 3 | 5.5 mm | 15 | DST | 50 | 000000000 | 00000 |
High-Strength 410 Stainless Steel Rounded
Head Thread-Forming Screws for Brittle Plastic
Stronger and more wear resistant than 18-8 stainless steel screws, these are magnetic and mildly chemical resistant. Alternating high and low threads minimize cracking and splitting in brittle material such as phenolic and glass-filled plastic. 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 | Approximate Threads per Inch | Tapping Screw Type | Pkg. Qty. | Pkg. | |
410 Stainless Steel | |||||||||
No. 4 | |||||||||
| 1/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 00000 |
| 5/16" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 3/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 1/2" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 5/8" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
| 3/4" | 0.193" | 0.071" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 0000 |
No. 6 | |||||||||
| 1/4" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 3/8" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 1/2" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 5/8" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 00000 |
| 3/4" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 00000 |
| 1" | 0.254" | 0.097" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 00000 |
No. 8 | |||||||||
| 3/8" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 5/8" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 1" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 1 1/4" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 1 1/2" | 0.27" | 0.097" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
No. 10 | |||||||||
| 3/8" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 21 | 16 | DST | 100 | 000000000 | 00000 |
No. 12 | |||||||||
| 1/2" | 0.373" | 0.133" | No. 3 | 3/16" | 16 | DST | 50 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 3 | 3/16" | 16 | DST | 50 | 000000000 | 00000 |
| 1" | 0.373" | 0.133" | No. 3 | 3/16" | 16 | DST | 50 | 000000000 | 00000 |
No. 14 | |||||||||
| 1/2" | 0.492" | 0.175" | No. 3 | 5.5 mm | 15 | DST | 50 | 000000000 | 00000 |
| 3/4" | 0.492" | 0.175" | No. 3 | 5.5 mm | 15 | DST | 50 | 000000000 | 00000 |
| 1" | 0.492" | 0.175" | No. 3 | 5.5 mm | 15 | DST | 50 | 000000000 | 00000 |
Flat Head Thread-Forming Screws for Brittle Plastic
Screws are beveled under the head for use in countersunk holes. Alternating high and low threads minimize cracking and splitting in brittle material such as phenolic and glass-filled plastic. Made from 410 stainless steel, these screws are strong, wear resistant, and mildly chemical resistant. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Tapping Screw Type | Pkg. Qty. | Pkg. | |
410 Stainless Steel | |||||||||
No. 4 | |||||||||
| 1/2" | 0.225" | 0.062" | No. 1 | No. 44 | 24 | DST | 100 | 000000000 | 00000 |
No. 6 | |||||||||
| 1/2" | 0.279" | 0.075" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 0000 |
| 5/8" | 0.279" | 0.075" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 00000 |
| 3/4" | 0.279" | 0.075" | No. 2 | No. 32 | 19 | DST | 100 | 000000000 | 00000 |
No. 8 | |||||||||
| 1/2" | 0.332" | 0.091" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 5/8" | 0.332" | 0.091" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |
| 3/4" | 0.332" | 0.091" | No. 2 | No. 29 | 18 | DST | 100 | 000000000 | 00000 |