• No plug or anchor needed. One through-fixing does the work of traditional nylon frame and hammer fixings, so you save time on site.
• Flat countersunk head with five locking ribs. It sits flush and grips the fixture to resist pull-through and loosening.
• TX Drive recess (TX30). Less cam-out and driver wear for fast, controlled driving. An S2 TX30 bit is included.
• Serrated V-thread with Hi-Low start. The Hi-Low thread on the first 30mm aids insertion and cuts the torque needed for a good bite in any masonry.
• Non-expansion design. Fix closer to edges without damaging the substrate.
• Carbon steel, Zinc & Yellow passivated (ZYP). Added corrosion resistance for interior, clean and dry environments (Corrosion Rating 1).
• BS 7671:2018 (18th Edition) approved. An all-steel, non-flammable fixing suitable for supporting wiring systems.
• Multi-substrate. Concrete, solid and perforated brick, block, natural stone and wood.

The TIMCO Multi-Fix Concrete Screw earns its keep across most masonry jobs:

• Fitting window and door frames directly through the frame into masonry.
• General fixing into concrete, brick, block and stone: battens, brackets, rails, fence posts and timber to masonry.
• Electrical wiring support. The BS 7671:2018 approval makes it suitable as an all-steel, non-flammable fixing for cables, trunking, conduit and containment.

1. Pick the correct screw length for your fixture, allowing a minimum embedment of 35mm into the base material.
2. Drill a 6.0mm diameter hole with a suitable masonry drill bit, going to the correct depth (at least the embedment depth plus a little clearance for dust).
3. Clear the dust from the hole so the thread gets maximum grip.
4. Drive the screw through the fixture and into the hole using a TX30 bit (supplied) until the countersunk head is seated and the fixture is secure. Don't over-tighten.

For window and door frames, the fixture hole diameter is 8.0mm with a maximum fixture thickness of 5mm on the 7.5 x 40mm size.

• Brand: TIMCO
• Material: Carbon Steel
• Finish: Zinc & Yellow Passivated (ZYP)
• Head type: Flat Countersunk with 5 locking ribs
• Recess / drive: TX Drive: TX30 (S2 bit included)
• Thread type: Serrated V-thread, Hi-Low start on first 30mm
• Point: Sharp
• Diameter: 7.5mm
• Drill hole diameter: 6.0mm
• Minimum embedment: 35mm
• Fixture hole diameter: 8.0mm
• Substrates: Concrete, brick, stone, block, wood
• Approval: BS 7671:2018 (18th Edition): suitable for supporting wiring systems
• Corrosion rating: 1: clean, dry & low-humidity (interior)
• Pack: Box of 100

Do you need a plug or anchor with concrete screws?

No wall plug or anchor. The TIMCO Multi-Fix Concrete Screw is a through-fixing that drives straight into the masonry. Drill the hole, drive the screw, and it cuts its own thread for an immediate hold.

What size hole do I drill for these concrete screws?

Go with a 6.0mm diameter hole for the 7.5mm Multi-Fix screw, drilled deep enough to give at least 35mm minimum embedment into the base material. In harder materials you may need a 6.5mm hole.

Can they be used for electrical or wiring support?

Yes. They're approved to BS 7671:2018 (18th Edition) as an all-steel, non-flammable fixing, so they're fine for supporting wiring systems such as cables, conduit, trunking and containment.

What substrates can I fix into?

Concrete, solid and perforated brick, block, natural stone and wood. One fixing covers most masonry tasks.

What bit do the screws use?

A TX30 (Torx) drive. There's an S2 TX30 driver bit in the box, so you're ready to fix straight away.

Are these screws suitable for outdoor use?

They carry Corrosion Rating 1 (zinc & yellow passivated) and are meant for clean, dry, low-humidity interior conditions. For anything permanently wet or exposed outdoors, pick a higher corrosion-rated fixing.

Available in a range of lengths (7.5mm diameter, roughly 40mm to 200mm), supplied in a box of 100 with a TX30 bit included. A fast, reliable masonry fixing that window fitters, builders and electricians rely on.