New A4 concrete screw for more demanding environments

EJOT’s UK based R&D team has played the key role in the development of a new high performing concrete screw for use in more challenging applications. The JC6-KB range of A4, grade 316 fasteners has been introduced in tandem with the expansion of EJOT’s established JC2 concrete screw range which now offers significantly greater application potential.

Option One approval for cracked / non-cracked concrete

The goal was to broaden the scope for using concrete screws in more demanding situations particularly those with environmental classifications C1 to C4, in accordance with BS EN 12944, and give construction professionals a further fastening options with the independent assurance of European Technical Assessment (ETA).

Engineered for high technical performance

The result is a bi-metallic, hexagon head concrete screw - distinguished by its gold marking. The fastener is available in 6, 8, 10, 12mm variants formed using corrosion-resistant A4 grade 316 austenitic stainless steel for the main fastener body and head, precision welded to hardened carbon steel on the lead threads.

This JC6-KB’s design also includes ‘anti back-out’ serrations. These serrations form part of the under-head design to provide much greater grip into metal fixture materials such as aluminium. It is part of the innovation that ensures the screws are as easy to use as all the products in the EJOT JC2 concrete screw range.

Performance benefits at a glance:

  • Superior corrosion resistance
  • Environmental classifications C1 up to C4
  • More versatility compared to many anchors
  • Minimal expansion means smaller spacings and edge distances
  • Simple installation provides a degree of adjustability
  • Gold mark bi-met indicator
  • Anti-back-out serrations under head

The A4 grade 316 JC6-KB is one part of EJOT’s recently upgraded range of concrete screws. This includes the JC2 range which offers five further screw types suitable in Option 1 cracked, non-cracked and hollowcore concrete suitable for in a wide variety of construction applications, all designed and manufactured to EJOT’s high quality standards and ETA-approved. Read more...


Technical Support: Talk to our team

The EJOT UK team offers a wealth of technical support and specialist guidance to specifiers and installers to ensure they can achieve the right result when anchoring into cracked and non-cracked concrete every time. If you’d like to talk to a specialist engineer, we are here to support you.

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Technical Brochure Available now

EJOT UK has published a new 20 page brochure that covers all technical performance and data requirements to provide designers and specifiers with an instant goto guide.

Read Online or Download PDF


Buy JC6-KB stainless concrete screw ​​​​​​​in the EJOT UK webshop

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EJOT’s JC2 range of carbon steel concrete screws offer new application potential

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