RS PRO, Plain Stainless Steel Locknut, DIN 985

From the trusted RS PRO brand, these lock nuts contain a nylon insert for safe and secure fastening. They are designed to remain secure despite conditions of severe vibration. The nut is made from A2 stainless steel with a bright zinc plating, for durability and environmental resistance over a long period of use. As it is A2 graded, it is even suitable for use in the food industry.

• Locking nuts for heavy-duty applications;• Glass-filled nylon inserts;• A2 stainless steel

Unlike conventional fasteners, lock nuts, sometimes known as self-locking nuts, contain a plastic insert that deforms to the thread of the fastener and prevents loosening without the aid lock threading adhesive. As such, they are often used where security in fastening is required. They are useful when joining soft materials such as wood and plastics where high surface pressure might damage the material, or when there is a short clamp load. However, their principal advantage is in applications where there is a high degree of vibration. Locking nuts resist loosening over time in dynamic load conditions. As such they are often used in;

• 521-917 is an M3 stainless steel self-locking nut;• 521-923 is an M4 stainless steel self-locking nut;• 521-939 is an M5 stainless steel self-locking nut;• 521-945 is an M6 stainless steel self-locking nut;• 521-951 is an M8 stainless steel self-locking nut;• 521-967 is an M10 stainless steel self-locking nut;• 521-973 is an M12 stainless steel self-locking nut;• 275-692 is an M16 stainless steel self-locking nut;• 275-709 is an M20 stainless steel self-locking nut

Locknuts can be applied in much the same way as conventional nuts. It is recommended to finger tighten as much as possible, and then tighten with an appropriate tool until the required torque is reached.

While a locking nut can be removed in much the same way a conventional nut can, their nylon inserts deform and degrade with each use. Therefore it is not recommended that self-locking nuts be re-used if it can be avoided, as their primary characteristic- the ability to dampen vibration and stress from dynamic loads- lessens in efficacy with each use.

RS PRO aims to be your go-to brand for reliability and value for money. We source great parts at great prices and test everything with our in-house experts to ensure the quality you need.