• Square twisted shank. Drives with a screwing action and grips hard for high pull-out resistance in timber connectors.
• Sherardised finish. A thermal-diffusion zinc coating that is even and hard-wearing; corrosion rating 2.
• Round head. Full bearing to hold joist hangers and framing anchors tight to the timber.
• Carbon steel, 30 x 3.75mm. The standard connector-nail size.
• Conforms to Eurocode 5, service class 2. Rated for structural connector fixing.

Sherardised square twist nails are the connector nail with a tougher, more even zinc coating. The twisted square shank grips like a screw for joist hangers and framing anchors.

• Fixing joist hangers, framing anchors and truss clips.
• Timber connector plates.
• High-grip timber-to-timber fixing.
• Sheltered and exterior connector work.

• Brand: TIMCO
• Material: Carbon steel
• Finish: Sherardised
• Head: Round
• Shank: Square twist
• Shank diameter: 3.75mm
• Size: 30 x 3.75mm
• Substrates: Timber connectors and metalwork
• Corrosion rating: 2 (occasionally damp, rural and sheltered)
• Standard: Conforms to Eurocode 5, service class 2
• Pack: Loose by weight

What is the difference between sherardised and galvanised square twist nails?

Both are zinc-coated to corrosion rating 2. Sherardising is a thermal-diffusion process that gives a harder, more even coating, which wears well on connector nails. In practice the protection is similar; sherardised just has a slightly tougher finish.

What are sherardised square twist nails used for?

Fixing timber connectors such as joist hangers, framing anchors and truss plates, where high grip and a durable coating both matter.

Why is the shank twisted?

The twist makes the nail drive with a screwing action and resists pull-out, keeping the connector tight against the timber under load.