Securfix Twin Thread Screws - 7 x 3/4in (3.9 x 20mm), Pack of 200

A pack of 200 3.9 x 20mm zinc plated twin thread screws, each one 3.9 x 20mm. Sold by Securfix with a cross/pozi drive, a countersunk head, a twin thread and a zinc plated finish, in 3.9 x 20mm.

Key features

• Size 3.9 x 20mm
• Also marked 7 x 3/4 inch
• Pack of 200
• Cross/pozi drive
• Countersunk head
• Twin thread
• Zinc plated finish

Specifications

Which one do I need?

In 3.9 x 20mm the first number is the gauge and the second is the length, so match both to your job. The 7 x 3/4 inch marking is the same screw.

How to use

1. Mark the fixing points.
2. Drill pilot holes in dense timber.
3. Fit a matching driver bit.
4. Drive in until flush.

FAQs

How many 3.9 x 20mm zinc plated twin thread screws are in the pack?

The pack holds 200, each 3.9 x 20mm.

What finish do the 200 3.9 x 20mm screws have?

Zinc plated finish.

Is the 3.9 x 20mm thread single or twin?

It is a twin thread.