Titan 858-812 Elastic Stop Nut

Elastic stop nut 858-812 for PowrTex, Commander, Admiral

The 858-812 elastic stop nut is a threaded fastener designed to resist loosening under vibration in compatible sprayer systems. It is specifically compatible with PowrTex 15-1, Commander, and Admiral models. This nut incorporates a locking feature, typically a nylon insert (often referred to as a Nylock nut) that is permanently embedded in the top of the nut. As the nut is threaded onto a bolt, the nylon insert deforms and creates a strong frictional grip on the bolt threads. This friction, combined with the elasticity of the nylon, prevents the nut from backing off due to vibration and dynamic loads, ensuring that critical connections remain tight and secure during operation. Elastic stop nuts are commonly used in areas subject to significant vibration, such as motor mounts, pump attachments, and control linkages. They are manufactured to precise specifications to ensure proper fit and reliable locking action. Over time, the nylon insert can lose its elasticity due to wear, overtightening, contamination, or heat. A worn or missing locking feature may allow the nut to loosen, leading to noise, misalignment, or component failure. Symptoms of a faulty elastic stop nut include the nut spinning easily on the bolt without resistance, visible thread damage, or loose components. Replacing a worn or missing elastic stop nut with this genuine part restores secure, vibration-resistant fastening. This simple component plays a crucial role in maintaining the integrity of the sprayer's assembly. Using the correct lock nut ensures that critical connections remain tight and reliable throughout operation.