hkm fasteners, Germany hkm models, hkm prices

hkm fasteners are made by bonding and vulcanizing a rubber ring and a metal ring into a single unit. They are sealing rings used to seal threaded and flange connections. The ring consists of a metal ring and a rubber gasket. The metal ring is treated for rust prevention, and the rubber ring is typically made of oil-resistant nitrile rubber or fluororubber. Combined gaskets are available in metric and imperial sizes, with standards specifying the combination of metal and rubber. Combined sealing gaskets are used for sealing threaded pipe fittings and plugs. They are generally used with compression-type pipe fittings to seal oil ports, primarily for static face sealing at the threaded connections of hydraulic valve pipe fittings. They are suitable for static face sealing at British and American standard imperial thread connections, as well as French and German standard metric thread connections.

hkm fastener applications

A type of fastener shaped like a flat circular ring. Placed between the support surface of a bolt, screw, or nut and the surface of the connected part, it serves to increase the contact surface area of the connected parts, reduce pressure per unit area, and protect the surface of the connected parts from damage. Another type, the elastic washer, also prevents the nut from loosening. Washers and retaining rings are elastic pads or anti-loosening washers that prevent bolts from loosening. The working principle of anti-loosening washers is very simple. They consist of two washers. The outer side has radial convex patterns, while the inner side has inclined teeth. During assembly, the inner inclined tooth surfaces face each other, and the outer radial convex patterns engage with the contact surfaces on both ends. When the connected parts are subjected to vibration and the bolt tends to loosen, only relative sliding between the inner inclined tooth surfaces of the two washers is allowed, generating lifting tension, thereby achieving 112% locking.

Wide application of hkm fasteners

Also used in faucets (valves) to cut off the flow of liquids or gases. Rubber or silicone gaskets can also be used to reduce fan vibration. Typically, the outer diameter of a washer is about twice its inner diameter. Nitrile rubber is the most commonly selected material for rubber gaskets due to its highest cost-performance ratio. The use of rubber gaskets is generally found in more advanced fields, such as aerospace and rocketry. However, their performance is excellent and can surpass many metal materials. Various types of fasteners can be seen on all kinds of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters, and supplies. Their characteristics include a wide variety of specifications, diverse performance and uses, and a high degree of standardization, serialization, and generalization. Therefore, some people refer to fasteners that already have national standards as standard fasteners, or simply as standard parts.

Features of hkm fasteners

Ensures that the clamping force of the connected parts is maintained even under strong vibration, superior to fasteners that rely on friction for self-locking; prevents bolt loosening caused by vibration, eliminating related problems caused by loose fasteners; no special installation work is required, making installation and disassembly easy; temperature changes do not cause the connected parts to loosen; durable; reusable. Improves the anti-loosening grade through structural anti-loosening methods, offering higher safety performance; prevents loosening caused by vibration and dynamic loads; Easy to install without affecting changes to installation drawings, and easy to disassemble; the loosening torque is greater than the tightening torque; The locking effect is not affected by lubrication, and increased lubrication improves the anti-loosening effect; has the same temperature characteristics as standard bolts and nuts; can be reused a limited number of times.

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