Safety ensured by FS Vario-Lock® 01 May 2024

The thread-lock FS Vario-Lock® from Flaig + Hommel GmbH is a screw thread-lock that allows variable positioning, extreme flexibility and versatility in securing screw threads. 

The braking torque, based on the DIN EN ISO 2320 standard, can be defined individually according to customer requirements. Any special thread can be implemented at the time of manufacturing special purpose screws and bolts with external thread, as well as for any customer specific screw types.

The locking effect is achieved through parallel displacement of the thread flanks at 360° of the screw thread. The thread play is eliminated from the screw joints at this point in the counter thread, which results in a locking effect. The Vario-Lock® thread grips the counter thread flanks firmly. The Vario-Lock® thread flank acts like a spring, producing the locking torque as specified by DIN 2320.  

Deputy Editor

Claire Aldridge Deputy Editor t: +44 (0) 1727 743 889


Having spent a decade in the fastener industry experiencing every facet – from steel mills, fastener manufacturers, wholesalers, distributors, as well as machinery builders and plating + coating companies, Claire has developed an in-depth knowledge of all things fasteners.

Alongside visiting numerous companies, exhibitions and conferences around the world, Claire has also interviewed high profile figures – focusing on key topics impacting the sector and making sure readers stay up to date with the latest developments within the industry.