Securfix Performance Screw 3.5 x 20mm - Box of 200

3.5 x 20mm performance screws from Securfix come 200 to a box, designed to start quickly and drive without a pilot hole. An anti-friction thread prevents jacking, and the thread is partially serrated. Listed materials include chipboard, PVCu, hardwood, sheet metal, softwood, MDF and plasterboard.

Key features

• Size 3.5 x 20mm, box of 200
• Self-drilling and self-countersinking
• No pilot hole needed
• Anti-friction thread prevents jacking
• Partially serrated thread
• Double corrosion resistance
• Suits chipboard, PVCu, hardwood, sheet metal, softwood, MDF and plasterboard
• PZ bit included

Specifications

Which one do I need?

Size 3.5 x 20mm gives diameter first and length second. Compare the length with the combined thickness of your parts so the point does not break out of the back.

How to use

1. Mark the positions and check there are no pipes or cables behind.
2. Skip the pilot hole, as the manufacturer says none is needed for a self-drilling screw.
3. Use a PZ bit that fits the head and keep it square while you drive.
4. Let the self-countersinking head finish flush with the surface, then stop.

FAQs

What does the box of 3.5 x 20mm screws contain?

The box holds 200, each 3.5 x 20mm.

Do I need a pilot hole for 3.5 x 20mm performance screws?

No. The manufacturer says they are self-drilling and need no pilot hole.

What does the thread do?

The anti-friction thread prevents jacking, and it is partially serrated.