HYTORC TRUE-LOCK Reaction Washer

The HYTORC TRUE-LOCK Reaction Washer is an innovative fastening solution that redefines the way bolting jobs are approached on site. By eliminating the need for a reaction arm entirely, it simplifies the bolting process, significantly reduces the risk of operator injury, and removes the pinch points that are an inherent hazard with conventional tooling setups.

At the heart of the TRUE-LOCK's design is a ridged locking mechanism — knurled bands on both faces of the washer that grip the mating surfaces to prevent rotation and protect the flange from damage. This keeps bolts firmly secured even under dynamic loads and vibration-heavy environments, making it particularly well suited to the demanding conditions found across quarrying, construction, and heavy industry applications.

Performance is independently verified. The TRUE-LOCK Reaction Washer has been tested to the industry-standard Junker Test and certified as compliant with DIN 25201-4 standards, giving engineers and operators confidence that accurate bolt load is being achieved and maintained. Consistent bolt load across a flange also reduces variation and improves the longevity of both the joint and the tooling used to assemble it.

As part of the wider HYTORC Washer System, the TRUE-LOCK pairs with HYTORC torque tools to create what is described as the simplest upgrade for instant improvements in safety, speed, and accuracy on any bolting application. No custom fixtures or reaction arms are required — just a cleaner, safer, and more efficient process.

Available in a comprehensive range of imperial and metric sizes — from 1/2" (M14) through to 2-1/4" (M56) — and offered in various materials and coatings to suit different industry environments, the TRUE-LOCK Reaction Washer is a versatile addition to any bolting programme.