Zap Screwlok Rebar Coupler | Shear Screw Mechanical Splice System

zap screwlok

The Zap Screwlok System is a shear screw mechanical splice designed for connecting existing bars or patch and repair applications. Its simple structure is engineered for ease of use and requires no specialized equipment for installation. The wedge shape allows for full performance regardless of orientation.

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No threading is required on the ends of the rebar, nor is it necessary to rotate the bars during installation. The rebar is supported by two serrated racks inside the coupler. A series of bolts are tightened to a specified torque, embedding them into the rebar. At the same time, the racks engage with both the rebar and the outer coupler body. Installation is complete once all bolt heads are sheared off. Bolts with diameters of 10–20 mm can be tightened using a ratchet wrench, while larger bolts are recommended to be tightened with a spanner. Impact tools must not be used. JBCZ couplers have been tested and shown to comply with the following design standards: BS EN 1992-1-1:2004 (Eurocode 2), British Standards BS 5400 and BS 8110, American Standard ACI 318, and German Standard DIN 1045.