Brass nut counter

Secure, stabilize and perpetuate your hydraulic installations with this industrial-grade brass locknut. A must-have in every general plumbing toolbox, this technical fastening accessory doesn't just complete a connection: it ensures the structural rigidity of your most critical installations. Whether you're a demanding professional or a gardening enthusiast looking to optimize your water harvesting, this locknut offers an infallible mechanical locking solution for all your long threads.

Precision engineering for high-performance locking

The reliability of a hydraulic circuit often depends on the smallest components. This locknut has been rigorously designed to meet the demands of domestic, agricultural and industrial installations. Unlike standard mass-market products, our locknut is the result of a precision forging and machining process (or high-fidelity bar turning), which guarantees perfectly calibrated threads and a total absence of porosity in the material.

The choice of CW617N brass is not insignificant: this noble alloy offers exceptional natural resistance to corrosion, limescale deposits and sudden temperature variations. Its hexagonal geometry has been specifically designed to offer a maximum contact surface with your wrenches, enabling you to apply a powerful locking torque without the risk of angle matting or tool slippage.

• Dimensional stability: Will not deform under the stress of overtightening, guaranteeing long-lasting hold.
• Chemical inertness: Compatible with a wide range of fluids, it remains neutral and will not contaminate your water systems.
• Pro finish: Clean machining facilitates priming on male threads, even in difficult-to-access areas.

ISO 228-1 gas standardization and PN 16 Bar resistance

The major advantage of this fitting is its full compliance with international plumbing standards. The thread is Gas "G" according to ISO 228-1 (BSPP), ensuring universal compatibility with your nipples, wall penetrations, manifolds and valves. You'll never have any doubts again when it comes to fitting: if your fitting is gas standard, this locknut will adapt to it with millimetric precision.

In terms of performance, this locknut is certified for a nominal pressure of PN 16 Bar. This high resistance capacity means it can be used in complete safety on constant-pressure networks, booster sets or central heating circuits. Its versatility also extends to sealing: depending on your application, it can be coupled with PTFE tape for dry locking, or with an elastomer/fiber gasket for compression sealing against a flat wall.

Simplified installation : The key to successful installation

Installation is quick andeasy, but requires a specific method to get the most out of the product. Used in conjunction with another fitting, it "counters" the thread to neutralize vibrations that could cause accidental loosening. When mounting a tap on a long thread, first screw on the locknut, then your tap. Once the faucet has been oriented as required, reassemble the locknut firmly against the base of the faucet. This mechanical lock instantly locks the position, saving you tedious adjustments with successive layers of Teflon.

Case studies: tank mounting and industrial securing

In the case of a 1000-litre rainwater harvesting tank, this locknut becomes the central element of your wall feed-through. For example, when placing a wall feed-through through the tank structure, the locknut is screwed on the inside (or outside) to compress a flat gasket against the plastic wall. This uniform pressure is the only guarantee of a lasting seal, despite the tank's filling and emptying cycles.

Another common scenario is in boiler rooms: the locknut is used to stabilize manifolds or to adjust the insertion depth of immersion heaters. Its sturdiness secures installations where thermal shocks (expansion/shrinkage) damage conventional threads. It's the assurance of equipment that won't budge, season after season, whatever the use.

Detailed technical specifications