Tapping Screw Type Tapping Screw Type | Show |
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System of Measurement System of Measurement |
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Drive Style Drive Style |
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| Phillips | External Hex |
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| Slotted | Tamper- Resistant Torx |
Material Material |
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Rounded Head Style Rounded Head Style |
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For Use In For Use In |
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Tapping Method Tapping Method |
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 | Thread Forming |
Finish Finish |
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Threading Threading |
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 | Fully Threaded |
Head Height Head Height |
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Head Diameter Head Diameter |
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Drill Bit Decimal Size Equivalent Drill Bit DecimalSize Equivalent |
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Shank Cross Section Shank Cross Section |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Rounded Head Profile Rounded Head Profile |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Tapping Screws
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18-8 Stainless Steel Rounded Head Blunt Screws for Sheet Metal
18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. Length is measured from under 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. 2 | ||||||||
| 1/8" | 0.167" | 0.053" | No. 1 | No. 48 | 32 | 50 | 000000000 | 00000 |
| 3/16" | 0.167" | 0.053" | No. 1 | No. 48 | 32 | 50 | 000000000 | 0000 |
| 1/4" | 0.167" | 0.053" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
| 5/16" | 0.167" | 0.053" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
| 3/8" | 0.167" | 0.053" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
| 1/2" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 50 | 000000000 | 0000 |
| 5/8" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
| 3/4" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 25 | 000000000 | 0000 |
| 1" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 25 | 000000000 | 0000 |
No. 4 | ||||||||
| 3/16" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 50 | 000000000 | 0000 |
| 1/4" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 5/16" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 3/8" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 7/16" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 25 | 000000000 | 0000 |
| 1/2" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 5/8" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 3/4" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 7/8" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 50 | 000000000 | 00000 |
| 1" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 25 | 000000000 | 0000 |
| 1 1/4" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 25 | 000000000 | 00000 |
| 1 3/4" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 10 | 000000000 | 0000 |
| 2" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 10 | 000000000 | 0000 |
No. 6 | ||||||||
| 3/16" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 50 | 000000000 | 0000 |
| 1/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 5/16" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 3/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 7/16" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 25 | 000000000 | 0000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 5/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 7/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 1" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 1 1/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 25 | 000000000 | 00000 |
| 1 1/2" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 25 | 000000000 | 0000 |
No. 7 | ||||||||
| 3/8" | 0.296" | 0.106" | No. 2 | No. 30 | 19 | 50 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 0000 |
| 5/16" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 0000 |
| 3/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 0000 |
| 7/16" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 25 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 0000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 7/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1 1/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 0000 |
| 1 1/2" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 0000 |
| 1 3/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 10 | 000000000 | 0000 |
| 2" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 5 | 000000000 | 0000 |
No. 10 | ||||||||
| 1/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 5/16" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 3/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 7/16" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 25 | 000000000 | 00000 |
| 1/2" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 5/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 0000 |
| 7/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 0000 |
| 1" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 1 1/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 1 1/2" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 1 3/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 5 | 000000000 | 0000 |
| 2" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 5 | 000000000 | 0000 |
No. 12 | ||||||||
| 3/8" | 0.425" | 0.151" | No. 3 | 3/16" | 14 | 100 | 000000000 | 00000 |
| 1/2" | 0.425" | 0.151" | No. 3 | 3/16" | 14 | 100 | 000000000 | 00000 |
| 5/8" | 0.425" | 0.151" | No. 3 | 3/16" | 14 | 100 | 000000000 | 00000 |
| 3/4" | 0.425" | 0.151" | No. 3 | 3/16" | 14 | 100 | 000000000 | 00000 |
| 7/8" | 0.425" | 0.151" | No. 3 | 3/16" | 14 | 50 | 000000000 | 0000 |
| 1" | 0.425" | 0.151" | No. 3 | 3/16" | 14 | 50 | 000000000 | 0000 |
| 1 1/4" | 0.425" | 0.151" | No. 3 | 3/16" | 14 | 50 | 000000000 | 0000 |
No. 14 | ||||||||
| 1/2" | 0.492" | 0.175" | No. 3 | 5.5 mm | 14 | 50 | 000000000 | 0000 |
| 5/8" | 0.492" | 0.175" | No. 3 | 5.5 mm | 14 | 50 | 000000000 | 0000 |
| 3/4" | 0.492" | 0.175" | No. 3 | 5.5 mm | 14 | 50 | 000000000 | 0000 |
| 1" | 0.492" | 0.175" | No. 3 | 5.5 mm | 14 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.492" | 0.175" | No. 3 | 5.5 mm | 14 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.492" | 0.175" | No. 3 | 5.5 mm | 14 | 25 | 000000000 | 0000 |
1/4" | ||||||||
| 3/8" | 0.476" | 0.169" | No. 3 | 5.5 mm | 14 | 10 | 000000000 | 00000 |
| 1 3/4" | 0.476" | 0.169" | No. 3 | 5.5 mm | 14 | 5 | 000000000 | 0000 |
| 2" | 0.476" | 0.169" | No. 3 | 5.5 mm | 14 | 5 | 000000000 | 00000 |
Super-Corrosion-Resistant 316 Stainless Steel
Rounded Head Blunt 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. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. Length is measured from under 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. 4 | ||||||||
| 1/4" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 00000 |
| 5/16" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 00000 |
| 3/8" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 00000 |
| 1/2" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 00000 |
No. 6 | ||||||||
| 1/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 5/16" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 3/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 0000 |
| 5/16" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 0000 |
| 3/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
No. 10 | ||||||||
| 3/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 1/2" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 5/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
High-Strength 410 Stainless Steel Rounded Head Blunt Screws for Sheet Metal
Stronger and more wear resistant than 18-8 and 316 stainless steel, these screws are magnetic and mildly chemical resistant. They're not for use with aluminum sheet metal. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. Length is measured from under 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. | |
410 Stainless Steel | ||||||||
No. 6 | ||||||||
| 1/2" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 5/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
No. 8 | ||||||||
| 3/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 0000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
No. 10 | ||||||||
| 1/2" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
Steel Rounded Head Blunt Screws for Sheet Metal
These steel screws are zinc plated to resist corrosion in wet environments. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. 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. | |
Black Zinc-Plated Steel | ||||||||
No. 4 | ||||||||
| 1/4" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 50 | 000000000 | 000000 |
| 3/8" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 50 | 000000000 | 0000 |
| 1/2" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 50 | 000000000 | 00000 |
No. 6 | ||||||||
| 1/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 50 | 000000000 | 00000 |
| 3/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 50 | 000000000 | 00000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 50 | 000000000 | 0000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 50 | 000000000 | 00000 |
No. 8 | ||||||||
| 3/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
| 1" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 50 | 000000000 | 00000 |
No. 10 | ||||||||
| 3/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 1/2" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 25 | 000000000 | 0000 |
| 1" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 25 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
No. 2 | ||||||||
| 1/8" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
| 3/16" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
| 1/4" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
| 5/16" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 100 | 000000000 | 00000 |
| 3/8" | 0.167" | 0.062" | No. 1 | No. 48 | 32 | 100 | 000000000 | 0000 |
No. 4 | ||||||||
| 3/16" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 1/4" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 5/16" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 3/8" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 1/2" | 0.219" | 0.08" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
No. 6 | ||||||||
| 3/16" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 1/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 5/16" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 3/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 1/2" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 5/8" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 3/4" | 0.27" | 0.097" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1" | 0.322" | 0.115" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
No. 10 | ||||||||
| 3/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1/2" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 5/8" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 3/4" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1" | 0.373" | 0.133" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
1/4" | ||||||||
| 1/2" | 0.492" | 0.175" | No. 3 | 5.5 mm | 14 | 50 | 000000000 | 00000 |
Hex Head Blunt Screws for Sheet Metal
These screws have a hex head for a secure grip with a wrench and a flange to reduce the risk of crushing thin metal. They require a drilled hole to install. Made from steel, they have a zinc plating to resist corrosion in wet environments. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. Length is measured from under the flange. Head height includes the flange.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Flange Dia. | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
External Hex—Zinc-Plated Steel | ||||||||
5/16" | ||||||||
| 1/2" | 0.5" | 0.285" | 0.676" | 6.9 mm | 12 | 25 | 000000000 | 00000 |
| 5/8" | 0.5" | 0.285" | 0.676" | 6.9 mm | 12 | 25 | 000000000 | 00000 |
| 3/4" | 0.5" | 0.285" | 0.676" | 6.9 mm | 12 | 25 | 000000000 | 00000 |
| 1" | 0.5" | 0.285" | 0.676" | 6.9 mm | 12 | 25 | 000000000 | 00000 |
3/8" | ||||||||
| 3/4" | 0.563" | 0.358" | 0.78" | 21/64" | 12 | 10 | 000000000 | 0000 |
| 1" | 0.563" | 0.358" | 0.78" | 21/64" | 12 | 10 | 000000000 | 00000 |
External Hex/Slotted—Zinc-Plated Steel | ||||||||
No. 4 | ||||||||
| 1/4" | 0.188" | 0.079" | 0.243" | No. 44 | 24 | 100 | 000000000 | 0000 |
| 3/8" | 0.188" | 0.079" | 0.243" | No. 44 | 24 | 100 | 000000000 | 0000 |
No. 6 | ||||||||
| 1/4" | 0.25" | 0.118" | 0.328" | No. 32 | 20 | 100 | 000000000 | 00000 |
| 3/8" | 0.25" | 0.118" | 0.328" | No. 32 | 20 | 100 | 000000000 | 0000 |
| 1/2" | 0.25" | 0.118" | 0.328" | No. 32 | 20 | 100 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/4" | 0.25" | 0.141" | 0.348" | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/8" | 0.25" | 0.141" | 0.348" | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1/2" | 0.25" | 0.141" | 0.348" | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/4" | 0.25" | 0.141" | 0.348" | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1" | 0.25" | 0.141" | 0.348" | No. 29 | 18 | 100 | 000000000 | 00000 |
No. 10 | ||||||||
| 3/8" | 0.313" | 0.151" | 0.414" | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1/2" | 0.313" | 0.151" | 0.414" | No. 21 | 16 | 100 | 000000000 | 00000 |
| 3/4" | 0.313" | 0.151" | 0.414" | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1" | 0.313" | 0.151" | 0.414" | No. 21 | 16 | 50 | 000000000 | 00000 |
1/4" | ||||||||
| 3/8" | 0.375" | 0.24" | 0.52" | 5.5 mm | 14 | 50 | 000000000 | 00000 |
| 1/2" | 0.375" | 0.24" | 0.52" | 5.5 mm | 14 | 50 | 000000000 | 00000 |
| 5/8" | 0.375" | 0.24" | 0.52" | 5.5 mm | 14 | 50 | 000000000 | 00000 |
| 3/4" | 0.375" | 0.24" | 0.52" | 5.5 mm | 14 | 25 | 000000000 | 00000 |
| 1" | 0.375" | 0.24" | 0.52" | 5.5 mm | 14 | 25 | 000000000 | 00000 |
| 1 1/4" | 0.375" | 0.24" | 0.52" | 5.5 mm | 14 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.375" | 0.24" | 0.52" | 5.5 mm | 14 | 25 | 000000000 | 00000 |
Steel Flat Head Blunt Screws for Sheet Metal
These steel screws are zinc plated to resist corrosion in wet environments. All are beveled under the head for use in countersunk holes. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. Length is measured from the top of the head.
Undercut screws allow for more threading.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Flat Head Profile | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
No. 4 | |||||||||
| 1/4" | Undercut | 0.212" | 0.047" | No. 1 | No. 44 | 24 | 100 | 000000000 | 00000 |
| 3/8" | Standard | 0.212" | 0.067" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 1/2" | Standard | 0.212" | 0.067" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
No. 6 | |||||||||
| 3/8" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 1/2" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 5/8" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 3/4" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 1" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
No. 8 | |||||||||
| 3/8" | Undercut | 0.312" | 0.07" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1/2" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 5/8" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/4" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
No. 10 | |||||||||
| 3/8" | Undercut | 0.362" | 0.081" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1/2" | Undercut | 0.362" | 0.081" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 5/8" | Standard | 0.362" | 0.116" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 3/4" | Standard | 0.362" | 0.116" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1" | Standard | 0.362" | 0.116" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
Stainless Steel Flat Head Blunt Screws for Sheet Metal
Made from 18-8 stainless steel, these screws are chemical resistant and may be mildly magnetic. They're beveled under the head for use in countersunk holes. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. Length is measured from the top of the head.
Undercut screws allow for more threading.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Flat Head Profile | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
No. 4 | |||||||||
| 1/4" | Undercut | 0.212" | 0.047" | No. 1 | No. 44 | 24 | 100 | 000000000 | 00000 |
| 3/8" | Standard | 0.212" | 0.067" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
| 1/2" | Standard | 0.212" | 0.067" | No. 1 | No. 44 | 24 | 100 | 000000000 | 0000 |
No. 6 | |||||||||
| 3/8" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 1/2" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 5/8" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 0000 |
| 3/4" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
| 1" | Standard | 0.262" | 0.083" | No. 2 | No. 32 | 20 | 100 | 000000000 | 00000 |
No. 8 | |||||||||
| 3/8" | Undercut | 0.312" | 0.07" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1/2" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 5/8" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 3/4" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
| 1" | Standard | 0.312" | 0.1" | No. 2 | No. 29 | 18 | 100 | 000000000 | 00000 |
No. 10 | |||||||||
| 3/8" | Undercut | 0.362" | 0.081" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1/2" | Undercut | 0.362" | 0.081" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 5/8" | Standard | 0.362" | 0.116" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 3/4" | Standard | 0.362" | 0.116" | No. 2 | No. 21 | 16 | 100 | 000000000 | 00000 |
| 1" | Standard | 0.362" | 0.116" | No. 2 | No. 21 | 16 | 50 | 000000000 | 00000 |
Sealing Blunt Screws for Sheet Metal
A rubber O-ring under the head creates a seal that withstands liquid and gas pressure. They're chemical-resistant 18-8 stainless steel and may be mildly magnetic. Often referred to as Type B thread-forming screws, they require a drilled hole and are typically used in 0.050"-0.200" material. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | Drive | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Size | Style | Drill Bit Size | Approximate Threads per Inch | O-Ring Temp. Range, °F | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||
No. 4 | ||||||||||
| 1/4" | 0.219" | 0.068" | No. 1 | Phillips | No. 44 | 24 | -40° to 225° | 10 | 000000000 | 000000 |
| 5/16" | 0.219" | 0.068" | No. 1 | Phillips | No. 44 | 24 | -40° to 225° | 10 | 000000000 | 00000 |
| 3/8" | 0.219" | 0.068" | No. 1 | Phillips | No. 44 | 24 | -40° to 225° | 10 | 000000000 | 00000 |
| 1/2" | 0.219" | 0.068" | No. 1 | Phillips | No. 44 | 24 | -40° to 225° | 10 | 000000000 | 00000 |
| 5/8" | 0.219" | 0.068" | No. 1 | Phillips | No. 44 | 24 | -40° to 225° | 10 | 000000000 | 00000 |
| 3/4" | 0.219" | 0.068" | No. 1 | Phillips | No. 44 | 24 | -40° to 225° | 10 | 000000000 | 00000 |
No. 6 | ||||||||||
| 1/4" | 0.27" | 0.082" | No. 2 | Phillips | No. 32 | 20 | -40° to 225° | 10 | 000000000 | 00000 |
| 5/16" | 0.27" | 0.082" | No. 2 | Phillips | No. 32 | 20 | -40° to 225° | 10 | 000000000 | 00000 |
| 3/8" | 0.27" | 0.082" | No. 2 | Phillips | No. 32 | 20 | -40° to 225° | 10 | 000000000 | 00000 |
| 1/2" | 0.27" | 0.082" | No. 2 | Phillips | No. 32 | 20 | -40° to 225° | 10 | 000000000 | 00000 |
| 5/8" | 0.27" | 0.082" | No. 2 | Phillips | No. 32 | 20 | -40° to 225° | 10 | 000000000 | 00000 |
| 3/4" | 0.27" | 0.082" | No. 2 | Phillips | No. 32 | 20 | -40° to 225° | 10 | 000000000 | 00000 |
No. 8 | ||||||||||
| 1/4" | 0.322" | 0.096" | No. 2 | Phillips | No. 29 | 18 | -40° to 225° | 10 | 000000000 | 00000 |
| 5/16" | 0.322" | 0.096" | No. 2 | Phillips | No. 29 | 18 | -40° to 225° | 10 | 000000000 | 00000 |
| 3/8" | 0.322" | 0.096" | No. 2 | Phillips | No. 29 | 18 | -40° to 225° | 10 | 000000000 | 00000 |
| 1/2" | 0.322" | 0.096" | No. 2 | Phillips | No. 29 | 18 | -40° to 225° | 10 | 000000000 | 00000 |
| 5/8" | 0.322" | 0.096" | No. 2 | Phillips | No. 29 | 18 | -40° to 225° | 10 | 000000000 | 00000 |
| 3/4" | 0.322" | 0.096" | No. 2 | Phillips | No. 29 | 18 | -40° to 225° | 10 | 000000000 | 00000 |
| 1" | 0.322" | 0.096" | No. 2 | Phillips | No. 29 | 18 | -40° to 225° | 10 | 000000000 | 00000 |
Tamper-Resistant Flat Head Drilling Screws for Metal
A tamper-resistant Torx driver is required for installation and removal. Also known as pin-in-Torx, these screws allow you to apply extra force with less slippage or damage to the recess. All are beveled under the head for use in countersunk holes. 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 the top of 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. | |
Zinc-Plated Steel | |||||||||||
No. 8 | |||||||||||
| 1/2" | No. 2 | 3/16" | 0.098" | 0.312" | 0.1" | T15 | 18 | Steel, Sheet Metal | 50 | 000000000 | 000000 |
| 3/4" | No. 2 | 3/16" | 0.098" | 0.312" | 0.1" | T15 | 18 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 1" | No. 2 | 3/16" | 0.098" | 0.312" | 0.1" | T15 | 18 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 1 1/4" | No. 2 | 3/16" | 0.098" | 0.312" | 0.1" | T15 | 18 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 1 1/2" | No. 2 | 3/16" | 0.098" | 0.312" | 0.1" | T15 | 18 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
No. 10 | |||||||||||
| 1/2" | No. 2 | 3/16" | 0.098" | 0.362" | 0.081" | T20 | 16 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 3/4" | No. 3 | 1/4" | 0.15" | 0.362" | 0.116" | T20 | 16 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 1" | No. 3 | 1/4" | 0.15" | 0.362" | 0.116" | T20 | 16 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 1 1/2" | No. 3 | 1/4" | 0.15" | 0.362" | 0.116" | T20 | 16 | Steel, Sheet Metal | 50 | 000000000 | 00000 |
| 2" | No. 3 | 1/4" | 0.15" | 0.362" | 0.116" | T20 | 16 | Steel, Sheet Metal | 25 | 000000000 | 00000 |
No. 14 | |||||||||||
| 1" | No. 3 | 11/32" | 0.21" | 0.531" | 0.161" | T27 | 14 | Steel, Sheet Metal | 25 | 000000000 | 00000 |
| 1 1/2" | No. 3 | 11/32" | 0.21" | 0.531" | 0.161" | T27 | 14 | Steel, Sheet Metal | 25 | 000000000 | 00000 |
| 2" | No. 3 | 11/32" | 0.21" | 0.531" | 0.161" | T27 | 14 | Steel, Sheet Metal | 25 | 000000000 | 00000 |
Blunt Screws for Wood
Often used for drawer slides and cabinet hardware, these screws—also known as Euro and Type B screws—create a strong hold in small, shallow holes in wood. They have a blunt tip that distributes strength throughout the entire length of the thread. They also form deep threads in materials such as particleboard, medium-density fiberboard, and hardwood. All of these screws are beveled under the head for use in countersunk holes. They require a drilled hole.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Length | Diameter | Height | Drive Size | Approximate Threads per Inch | Threading | Tapping Screw Type | Pkg. Qty. | Pkg. | |
Steel | |||||||||
1/4" | |||||||||
| 3/8" | 0.295" | 3/32" | No. 2 | 11 | Fully Threaded | B | 50 | 000000000 | 00000 |
| 7/16" | 0.295" | 3/32" | No. 2 | 11 | Fully Threaded | B | 50 | 000000000 | 0000 |
| 1/2" | 0.295" | 3/32" | No. 2 | 11 | Fully Threaded | B | 50 | 000000000 | 0000 |
| 9/16" | 0.295" | 3/32" | No. 2 | 11 | Fully Threaded | B | 50 | 000000000 | 0000 |
| 13/16" | 0.295" | 3/32" | No. 2 | 11 | Fully Threaded | B | 50 | 000000000 | 00000 |