Securfix Twin Thread Screws 4.0 x 25mm, Pack of 200

4.0 x 25mm twin thread screws, made by Securfix, are supplied 200 to a pack. The head is countersunk, the drive is cross/pozi and the finish is zinc plated.

Key features

• Size 4.0 x 25mm (8 x 1 inch)
• Pack of 200
• Twin thread
• Cross/pozi drive
• Countersunk head
• Zinc plated

Specifications

Which one do I need?

Length is the second figure in the size, so for 25mm add the thickness of the top piece to the bite you want in the base and compare.

How to use

1. Set out the fixings first, spacing them so every 25mm screw has timber or board to bite into.
2. Drill a small pilot hole through the first piece to keep the 25mm screw straight.
3. Drive at a steady speed with a bit that matches the recess, keeping the 25mm screw straight.
4. Stop driving as soon as the 25mm head sits level, and check the joint is tight.

FAQs

What is in the pack of 4.0 x 25mm twin thread screws?

The pack holds 200 screws, each 25mm long.

What is the screw size?

Each screw is 25mm long.

What finish do they have?

They are zinc plated, with a cross/pozi drive on a 25mm countersunk head.