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Steel Flanged Piercing Screws for Sheet Metal
These steel screws are zinc plated to resist corrosion in wet environments. Also known as needle point screws, they're designed with a pointed tip that pierces a starter hole in sheets up to 0.050" thick. All have a hex head for a secure grip with a wrench and a flange to reduce the risk of crushing thin metal. 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. | |
Zinc-Plated Steel | ||||||||
No. 6  | ||||||||
| 3/8" | 0.25" | 0.118" | 0.328" | No. 32 | 18 | 100 | 000000000 | 00000 |
No. 7 | ||||||||
| 1/2" | 0.25" | 0.122" | 0.328" | No. 30 | 16 | 100 | 000000000 | 0000 |
No. 8 | ||||||||
| 1/2" | 0.25" | 0.141" | 0.348" | No. 29 | 15 | 100 | 000000000 | 0000 |
| 3/4" | 0.25" | 0.141" | 0.348" | No. 29 | 15 | 100 | 000000000 | 0000 |
| 1" | 0.25" | 0.141" | 0.348" | No. 29 | 15 | 100 | 000000000 | 0000 |
| 2" | 0.25" | 0.141" | 0.348" | No. 29 | 15 | 50 | 000000000 | 0000 |
No. 10 | ||||||||
| 1/2" | 0.25" | 0.141" | 0.348" | No. 21 | 12 | 100 | 000000000 | 0000 |
| 1/2" | 0.313" | 0.151" | 0.414" | No. 21 | 12 | 100 | 000000000 | 0000 |
| 3/4" | 0.25" | 0.141" | 0.348" | No. 21 | 12 | 100 | 000000000 | 0000 |
| 3/4" | 0.313" | 0.151" | 0.414" | No. 21 | 12 | 100 | 000000000 | 0000 |
| 1" | 0.25" | 0.141" | 0.348" | No. 21 | 12 | 100 | 000000000 | 0000 |
| 1" | 0.313" | 0.151" | 0.414" | No. 21 | 12 | 100 | 000000000 | 0000 |
| 1 1/2" | 0.313" | 0.151" | 0.414" | No. 21 | 12 | 100 | 000000000 | 0000 |
Stainless Steel Flanged Piercing Screws for Sheet Metal
Made from 410 stainless steel, these screws are strong, wear resistant, mildly chemical resistant, and magnetic. They're not for use with aluminum sheet metal. Also known as needle point screws, they're designed with a pointed tip to pierce a starter hole in sheets up to 0.050" thick. All have a hex head for a secure grip with a wrench and a flange to reduce the risk of crushing thin metal. 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. | |
410 Stainless Steel | ||||||||
No. 6 | ||||||||
| 3/8" | 0.25" | 0.118" | 0.328" | No. 32 | 18 | 50 | 000000000 | 000000 |
| 1/2" | 0.25" | 0.118" | 0.328" | No. 32 | 18 | 50 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/2" | 0.25" | 0.141" | 0.348" | No. 29 | 15 | 50 | 000000000 | 00000 |
| 3/4" | 0.25" | 0.141" | 0.348" | No. 29 | 15 | 50 | 000000000 | 00000 |
No. 10 | ||||||||
| 1" | 0.25" | 0.142" | 0.343" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 1 1/2" | 0.25" | 0.142" | 0.343" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 2" | 0.25" | 0.142" | 0.343" | No. 21 | 12 | 25 | 000000000 | 00000 |
Serrated-Flange Piercing Screws for Sheet Metal
Serrations under the head act as a brake to prevent over tightening and damaging threads. Also known as needle point screws, they're designed with a pointed tip to pierce a starter hole in sheets up to 0.050" thick. They have a hex head for a secure grip with a wrench and a flange to reduce the risk of crushing thin metal. Made from steel, a zinc plating provides corrosion resistance in wet environments. 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. | Drive Style | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
No. 6 | |||||||||
| 3/8" | 0.25" | 0.128" | 0.328" | External Hex/Slotted | No. 32 | 18 | 100 | 000000000 | 00000 |
No. 7 | |||||||||
| 1/2" | 0.25" | 0.146" | 0.328" | External Hex/Slotted | No. 30 | 16 | 100 | 000000000 | 0000 |
No. 8 | |||||||||
| 1/2" | 0.25" | 0.149" | 0.348" | External Hex/Slotted | No. 29 | 15 | 100 | 000000000 | 0000 |
No. 10 | |||||||||
| 1/2" | 0.25" | 0.16" | 0.414" | External Hex/Slotted | No. 21 | 12 | 100 | 000000000 | 00000 |
| 3/4" | 0.25" | 0.16" | 0.414" | External Hex/Slotted | No. 21 | 12 | 100 | 000000000 | 00000 |