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About Tapping Screws
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Square-Drive Rounded Head Drilling Screws for Metal
Stronger and more wear resistant than 18-8 stainless steel, these screws are mildly chemical resistant and may be mildly magnetic. They save you time and effort by drilling their own holes and fastening in a single operation. Not for use with aluminum. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Drill Tip | Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Type | Lg. | Max. Drilling Thick. | Dia. | Ht. | Drive Size | Approximate Threads per Inch | For Use In | Pkg. Qty. | Pkg. | |
410 Stainless Steel | |||||||||||
No. 6 | |||||||||||
| 3/8" | No. 1 | 7/64" | 0.035" | 0.27" | 0.097" | No. 1 | 20 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 00000 |
| 1/2" | No. 2 | 9/64" | 0.09" | 0.27" | 0.097" | No. 1 | 20 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 0000 |
| 5/8" | No. 2 | 9/64" | 0.09" | 0.27" | 0.097" | No. 1 | 20 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 0000 |
| 3/4" | No. 2 | 9/64" | 0.09" | 0.27" | 0.097" | No. 1 | 20 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 0000 |
| 1" | No. 2 | 9/64" | 0.09" | 0.27" | 0.097" | No. 1 | 20 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 0000 |
| 1 1/4" | No. 2 | 9/64" | 0.09" | 0.27" | 0.097" | No. 1 | 20 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 00000 |
No. 8 | |||||||||||
| 3/8" | No. 2 | 1/8" | 0.035" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 0000 |
| 1/2" | No. 2 | 3/16" | 0.098" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 0000 |
| 5/8" | No. 2 | 3/16" | 0.098" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 100 | 000000000 | 0000 |
| 3/4" | No. 2 | 3/16" | 0.098" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 0000 |
| 1" | No. 2 | 3/16" | 0.098" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 0000 |
| 1 1/4" | No. 2 | 3/16" | 0.098" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 0000 |
| 1 1/2" | No. 2 | 3/16" | 0.098" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 2" | No. 2 | 3/16" | 0.098" | 0.322" | 0.115" | No. 2 | 18 | Steel, Stainless Steel, Sheet Metal | 25 | 000000000 | 0000 |
No. 10 | |||||||||||
| 1/2" | No. 2 | 13/64" | 0.106" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 0000 |
| 5/8" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 0000 |
| 3/4" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 0000 |
| 1" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 1 1/4" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 25 | 000000000 | 0000 |
| 1 1/2" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 25 | 000000000 | 0000 |
| 2" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 25 | 000000000 | 00000 |
| 2 1/2" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
| 3" | No. 3 | 1/4" | 0.15" | 0.373" | 0.133" | No. 2 | 16 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
No. 12 | |||||||||||
| 3/4" | No. 3 | 9/32" | 0.187" | 0.425" | 0.151" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 25 | 000000000 | 0000 |
| 1" | No. 3 | 9/32" | 0.187" | 0.425" | 0.151" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 25 | 000000000 | 00000 |
| 1 1/4" | No. 3 | 9/32" | 0.187" | 0.425" | 0.151" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 25 | 000000000 | 00000 |
| 1 1/2" | No. 3 | 9/32" | 0.187" | 0.425" | 0.151" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
| 2" | No. 3 | 9/32" | 0.187" | 0.425" | 0.151" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
No. 14 | |||||||||||
| 3/4" | No. 3 | 5/16" | 0.21" | 0.492" | 0.175" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
| 1" | No. 3 | 5/16" | 0.21" | 0.492" | 0.175" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
| 1 1/4" | No. 3 | 5/16" | 0.21" | 0.492" | 0.175" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
| 1 1/2" | No. 3 | 5/16" | 0.21" | 0.492" | 0.175" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
| 2" | No. 3 | 5/16" | 0.21" | 0.492" | 0.175" | No. 3 | 14 | Steel, Stainless Steel, Sheet Metal | 10 | 000000000 | 0000 |
Low-Profile Rounded Head Drilling Screws for Metal
Also known as pancake head screws, these have a head that is about two-thirds the height of standard rounded head screws. They're designed to attach framing to metal up to 3/16" thick. They save you time and effort by drilling their own holes and fastening in a single operation. Made from steel, they have a zinc plating to resist corrosion in wet environments. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Drill Tip | Head | Drive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Type | Lg. | Max. Drilling Thick. | Dia. | Ht. | Size | Style | Approximate Threads per Inch | For Use In | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||||||
No. 10 | ||||||||||||
| 1" | No. 3 | 1/4" | 0.15" | 0.438" | 0.094" | No. 2 | Phillips/Square | 16 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
No. 12 | ||||||||||||
| 1" | No. 3 | 9/32" | 0.187" | 0.438" | 0.094" | No. 2 | Phillips/Square | 14 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
Rounded Head Drilling Screws for Aluminum
Fasten aluminum to aluminum and steel framing. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. They save you time and effort by drilling their own holes and fastening in a single operation. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Drill Tip | Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Type | Lg. | Max. Drilling Thick. | Dia. | Ht. | Drive Size | Approximate Threads per Inch | For Use In | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||||
No. 6 | |||||||||||
| 3/8" | No. 2 | 9/64" | 0.9" | 0.27" | 0.097" | No. 2 | 20 | Aluminum, Sheet Metal | 25 | 000000000 | 00000 |
| 1/2" | No. 2 | 9/64" | 0.9" | 0.27" | 0.097" | No. 2 | 20 | Aluminum, Sheet Metal | 25 | 000000000 | 00000 |
No. 8 | |||||||||||
| 3/8" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 25 | 000000000 | 00000 |
| 1/2" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 25 | 000000000 | 00000 |
| 5/8" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 25 | 000000000 | 00000 |
| 3/4" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 25 | 000000000 | 00000 |
| 1" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 1 1/4" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 1 1/2" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 2" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 2 1/2" | No. 2 | 3/16" | 0.1" | 0.322" | 0.115" | No. 2 | 18 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
No. 10 | |||||||||||
| 1/2" | No. 2 | 13/64" | 0.11" | 0.373" | 0.133" | No. 2 | 16 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 5/8" | No. 3 | 1/4" | 0.175" | 0.373" | 0.133" | No. 3 | 16 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 3/4" | No. 3 | 1/4" | 0.175" | 0.373" | 0.133" | No. 3 | 16 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 1" | No. 3 | 1/4" | 0.15" | 0.373" | 0.137" | No. 2 | 16 | Aluminum, Sheet Metal | 25 | 000000000 | 0000 |
| 1 1/4" | No. 3 | 1/4" | 0.15" | 0.373" | 0.137" | No. 2 | 16 | Aluminum, Sheet Metal | 25 | 000000000 | 0000 |
| 1 1/2" | No. 3 | 1/4" | 0.15" | 0.373" | 0.137" | No. 2 | 16 | Aluminum, Sheet Metal | 25 | 000000000 | 0000 |
| 1 3/4" | No. 3 | 1/4" | 0.175" | 0.373" | 0.133" | No. 3 | 16 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
| 2" | No. 3 | 1/4" | 0.15" | 0.373" | 0.137" | No. 2 | 16 | Aluminum, Sheet Metal | 25 | 000000000 | 00000 |
| 2 1/2" | No. 3 | 1/4" | 0.175" | 0.373" | 0.133" | No. 3 | 16 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
| 3" | No. 3 | 1/4" | 0.175" | 0.373" | 0.133" | No. 3 | 16 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
No. 12 | |||||||||||
| 3/4" | No. 3 | 9/32" | 0.21" | 0.425" | 0.151" | No. 3 | 14 | Aluminum, Sheet Metal | 10 | 000000000 | 0000 |
| 1" | No. 3 | 9/32" | 0.21" | 0.425" | 0.151" | No. 3 | 14 | Aluminum, Sheet Metal | 10 | 000000000 | 00000 |
| 1 1/4" | No. 3 | 9/32" | 0.21" | 0.425" | 0.151" | No. 3 | 14 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
| 1 1/2" | No. 3 | 9/32" | 0.21" | 0.425" | 0.151" | No. 3 | 14 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
| 2" | No. 3 | 9/32" | 0.21" | 0.425" | 0.151" | No. 3 | 14 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
1/4" | |||||||||||
| 3/4" | No. 3 | 5/16" | 0.22" | 0.492" | 0.175" | No. 3 | 14 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
| 1" | No. 3 | 5/16" | 0.22" | 0.492" | 0.175" | No. 3 | 14 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
| 1 1/4" | No. 3 | 5/16" | 0.22" | 0.492" | 0.175" | No. 3 | 14 | Aluminum, Sheet Metal | 5 | 000000000 | 0000 |
| 1 1/2" | No. 3 | 5/16" | 0.22" | 0.492" | 0.175" | No. 3 | 14 | Aluminum, Sheet Metal | 1 | 000000000 | 0000 |
| 2" | No. 3 | 5/16" | 0.22" | 0.492" | 0.175" | No. 3 | 14 | Aluminum, Sheet Metal | 1 | 000000000 | 0000 |
18-8 Stainless Steel Square-Drive
Rounded Head Screws for Sheet Metal
18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. They penetrate 0.025" and thinner sheet metal. 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 | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
No. 4 | ||||||||
| 3/8" | 0.219" | 0.086" | No. 0 | No. 44 | 24 | 100 | 000000000 | 00000 |
| 1/2" | 0.219" | 0.086" | No. 0 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 5/8" | 0.219" | 0.086" | No. 0 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 3/4" | 0.219" | 0.086" | No. 0 | No. 44 | 24 | 100 | 000000000 | 0000 |
No. 6 | ||||||||
| 3/8" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1/2" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 5/8" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 3/4" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
| 1 1/2" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 50 | 000000000 | 0000 |
| 2" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 50 | 000000000 | 0000 |
No. 8 | ||||||||
| 3/8" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1/2" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 5/8" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 3/4" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 1 1/4" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 1 1/2" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 1 3/4" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 2" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 2 1/2" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 25 | 000000000 | 0000 |
No. 10 | ||||||||
| 1/2" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 5/8" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 3/4" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 1" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 1 1/4" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 1 1/2" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 1 3/4" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
| 2" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
| 2 1/2" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
| 3" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
No. 12 | ||||||||
| 1/2" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 50 | 000000000 | 0000 |
| 5/8" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 50 | 000000000 | 0000 |
| 3/4" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 50 | 000000000 | 0000 |
| 1" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 50 | 000000000 | 0000 |
| 1 1/4" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 2" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 2 1/2" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 25 | 000000000 | 00000 |
| 3" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 10 | 000000000 | 0000 |
No. 14 | ||||||||
| 1/2" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 50 | 000000000 | 00000 |
| 3/4" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 0000 |
| 1" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 0000 |
| 1 1/4" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 00000 |
| 1 3/4" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 10 | 000000000 | 0000 |
| 2" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 10 | 000000000 | 0000 |
| 2 1/2" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 10 | 000000000 | 0000 |
| 3" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 10 | 000000000 | 0000 |
Super-Corrosion-Resistant 316 Stainless Steel
Square-Drive Rounded Head Screws for Sheet Metal
More corrosion resistant than 18-8 stainless steel screws, these have excellent resistance to chemicals and salt water and may be mildly magnetic. They penetrate 0.025" and thinner sheet metal. 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 | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
No. 6 | ||||||||
| 1/2" | 0.27" | 0.082" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
| 5/8" | 0.27" | 0.082" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
| 3/4" | 0.27" | 0.082" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
| 1" | 0.27" | 0.082" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/2" | 0.322" | 0.096" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.096" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.096" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 1" | 0.322" | 0.096" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 1 1/4" | 0.322" | 0.096" | No. 2 | No. 29 | 15 | 50 | 000000000 | 00000 |
| 1 1/2" | 0.322" | 0.096" | No. 2 | No. 29 | 15 | 50 | 000000000 | 00000 |
No. 10 | ||||||||
| 1/2" | 0.373" | 0.11" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 5/8" | 0.373" | 0.11" | No. 2 | No. 21 | 12 | 50 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.11" | No. 2 | No. 21 | 12 | 50 | 000000000 | 00000 |
| 1" | 0.373" | 0.11" | No. 2 | No. 21 | 12 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.373" | 0.11" | No. 2 | No. 21 | 12 | 50 | 000000000 | 00000 |
| 1 1/2" | 0.373" | 0.11" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
| 2" | 0.373" | 0.11" | No. 2 | No. 21 | 12 | 25 | 000000000 | 00000 |
No. 12 | ||||||||
| 3/4" | 0.425" | 1/8" | No. 3 | 3/16" | 11 | 50 | 000000000 | 00000 |
| 1" | 0.425" | 1/8" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.425" | 1/8" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
Steel Square-Drive Rounded Head Screws for Sheet Metal
These steel screws are zinc plated to resist corrosion in wet environments. They penetrate 0.025" and thinner sheet metal. 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 | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
No. 6 | ||||||||
| 3/8" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
| 1/2" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 3/4" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.27" | 0.103" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
No. 8 | ||||||||
| 3/8" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1/2" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 3/4" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 2" | 0.322" | 0.12" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
No. 10 | ||||||||
| 1/2" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 100 | 000000000 | 0000 |
| 3/4" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 1" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 1 1/4" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 1 1/2" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 2" | 0.373" | 0.137" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
No. 12 | ||||||||
| 3/4" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 100 | 000000000 | 00000 |
| 1" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 100 | 000000000 | 00000 |
| 1 1/2" | 0.425" | 0.153" | No. 3 | 3/16" | 11 | 50 | 000000000 | 00000 |
No. 14 | ||||||||
| 3/4" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 50 | 000000000 | 00000 |
| 1" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 50 | 000000000 | 00000 |
| 1 1/2" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 0000 |
| 2" | 0.473" | 0.175" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 00000 |
Square-Drive Flanged Extra-Wide
Rounded Head Screws for Sheet Metal
These screws have a flange under the head that distributes holding pressure and reduce the risk of crushing thin metal. Made from steel, they have a zinc plating to resist corrosion in wet environments. They penetrate 0.025" and thinner sheet metal. Length is measured from under the flange.
For technical drawings and 3-D models, click on a part number.
| Lg. | Head Ht. | Flange Dia. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
No. 8 | ||||||||
| 1/2" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 100 | 000000000 | 000000 |
| 5/8" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 3/4" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 1" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 1 1/4" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 1 1/2" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 2" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 100 | 000000000 | 00000 |
| 2 1/2" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 50 | 000000000 | 00000 |
| 3" | 0.113" | 0.361" | No. 2 | No. 29 | 15 | 50 | 000000000 | 00000 |
No. 10 | ||||||||
| 1/2" | 0.12" | 0.423" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 3/4" | 0.12" | 0.423" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 1" | 0.12" | 0.423" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 1 1/4" | 0.12" | 0.423" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 1 1/2" | 0.12" | 0.423" | No. 2 | No. 21 | 12 | 100 | 000000000 | 00000 |
| 2" | 0.12" | 0.423" | No. 2 | No. 21 | 12 | 50 | 000000000 | 00000 |
No. 12 | ||||||||
| 3/4" | 0.145" | 0.499" | No. 3 | 3/16" | 11 | 50 | 000000000 | 00000 |
| 1" | 0.145" | 0.499" | No. 3 | 3/16" | 11 | 50 | 000000000 | 00000 |
Square-Drive Flat Head Screws for Sheet Metal
Beveled under the head for use in countersunk holes. Made from 18-8 stainless steel, these screws are chemical resistant and may be mildly magnetic. They penetrate 0.025" and thinner sheet metal. 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 | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
No. 6 | ||||||||
| 1/2" | 0.262" | 0.083" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
| 3/4" | 0.262" | 0.083" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1" | 0.262" | 0.083" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.262" | 0.083" | No. 1 | No. 32 | 18 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.262" | 0.083" | No. 1 | No. 32 | 18 | 100 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/2" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 5/8" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 3/4" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 1 3/4" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 2" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 50 | 000000000 | 0000 |
| 2 1/2" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 50 | 000000000 | 00000 |
| 3" | 0.312" | 0.1" | No. 2 | No. 29 | 15 | 25 | 000000000 | 0000 |
No. 10 | ||||||||
| 3/4" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 100 | 000000000 | 0000 |
| 1" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 1 1/4" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 1 1/2" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 1 3/4" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 50 | 000000000 | 0000 |
| 2" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
| 2 1/2" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
| 3" | 0.362" | 0.116" | No. 2 | No. 21 | 12 | 25 | 000000000 | 0000 |
No. 12 | ||||||||
| 1" | 0.412" | 0.132" | No. 3 | 3/16" | 11 | 50 | 000000000 | 0000 |
| 1 1/4" | 0.412" | 0.132" | No. 3 | 3/16" | 11 | 50 | 000000000 | 00000 |
| 1 1/2" | 0.412" | 0.132" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 1 3/4" | 0.412" | 0.132" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 2" | 0.412" | 0.132" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 2 1/2" | 0.412" | 0.132" | No. 3 | 3/16" | 11 | 25 | 000000000 | 0000 |
| 3" | 0.412" | 0.132" | No. 3 | 3/16" | 11 | 25 | 000000000 | 00000 |
No. 14 | ||||||||
| 1" | 0.462" | 0.148" | No. 3 | 5.5 mm | 10 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.462" | 0.148" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.462" | 0.148" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 0000 |
| 1 3/4" | 0.462" | 0.148" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 0000 |
| 2" | 0.462" | 0.148" | No. 3 | 5.5 mm | 10 | 25 | 000000000 | 00000 |
| 2 1/2" | 0.462" | 0.148" | No. 3 | 5.5 mm | 10 | 10 | 000000000 | 0000 |
| 3" | 0.462" | 0.148" | No. 3 | 5.5 mm | 10 | 10 | 000000000 | 0000 |