Securfix Twin Thread Screws 6 x 1 1/2 inch, 3.5 x 40mm, Pack of 200

This is a pack of 200 3.5 x 40mm twin thread screws from Securfix, in size 6 x 1 1/2 inch (3.5 x 40mm). A zinc plated finish and a countersunk head come with the cross/pozi drive.

Key features

• Size 6 x 1 1/2 inch (3.5 x 40mm)
• Pack of 200
• Twin thread
• Cross/pozi drive
• Countersunk head
• Zinc plated

Specifications

Which one do I need?

A 40mm screw suits a joint whose overall depth is close to that, so measure before ordering.

How to use

1. Hold the pieces together and mark each fixing point, keeping in mind that the screws are 40mm long.
2. Pre-drill near edges and board ends, as a 40mm screw can split thin material.
3. Choose a cross/pozi bit that suits the 40mm screw, and keep the driver in line.
4. Sink each head level, then check the joint before moving on to the next 40mm fixing.

FAQs

How many screws are supplied in the 6 x 1 1/2 inch (3.5 x 40mm) pack?

The pack holds 200 screws, each 40mm long.

Which size is this?

Each is 40mm long, which the manufacturer calls 3.5 x 40mm twin thread screws.

Which bit do I need?

Use a cross or pozi bit; the 40mm screw has a cross/pozi drive and a countersunk head.