Mechanical Parts
Mechanical Parts are essential components used in industrial machinery, automation systems, robotics, maintenance equipment, and custom mechanical assemblies. At JLCMC, we provide a comprehensive range of high-quality mechanical parts designed to support power transmission, fastening, sealing, positioning, lubrication, and fluid connection applications across various industries. Our Mechanical Parts category includes machine keys, springs, O-rings, shaft collars, washers, gaskets, cotter pins, pipe fittings, grease nipples, and other essential industrial components. Manufactured with precision and durability in mind, these products help improve equipment stability, operational efficiency, and long-term reliability in demanding working environments. Whether for factory automation, equipment maintenance, or custom engineering projects, JLCMC offers dependable mechanical solutions with broad specifications, stable quality, competitive pricing, and fast global delivery to meet diverse industrial needs.
Machine keys
Find machine key stock at JLCMC, including rounded machine keys (square/round-square), machine keys, precision, threaded, and long machine keys. All are cost-effective and available for same-day shipping. Machine keys are typically installed in the keyways of shafts and connecting components, and play a crucial role in torque transmission, preventing rotational slip, and securing the relative positions between the shaft and the connected parts. They are widely used in industries such as conveyor systems, machinery, industrial applications, and automation, including gears, engines, pumps, compressors, and conveyors. Due to their efficient and reliable torque transmission capabilities, ease of replacement, and cost-effectiveness, machine keys are an indispensable foundational component in modern mechanical equipment.
5 ProductsSprings
Springs are one of the essential components in mechanical and industrial automation, widely used for energy storage, shock absorption, resetting, and maintaining force. JLCMC offers a range of springs and accessories, including die springs, extension springs, disc springs, torsion springs, compression springs, extension spring stud anchors, and gas spring angle brackets. These components are utilized in various applications, such as automotive suspensions, valve systems, and actuators, providing necessary force regulation and precise control to enhance the reliability and performance of equipment.
58 ProductsO-Rings
An O-ring is a commonly used sealing component made from rubber or other elastic materials, shaped in a circular ring. It is widely used in various industries for static or dynamic sealing, preventing the leakage of liquids or gases. The O-ring works by being compressed between two mating parts, creating a seal that prevents substances from leaking. Despite its simple design, the O-ring is highly effective and is used in mechanical, hydraulic, pneumatic systems, automobiles, and household appliances. Depending on the application, O-rings can be made from various materials such as nitrile rubber (NBR), fluorocarbon rubber (FKM), silicone (SI), and others, which can withstand different temperatures, pressures, and chemical environments. The benefits of O-rings include excellent sealing performance, low cost, ease of installation, and adaptability to various working conditions. O-rings are commonly found in hydraulic systems, pumps, engines, valves, and many other devices, providing reliable sealing solutions.
28 ProductsShaft Collars / Washers / Gaskets
Choose from our selection of Shaft Collar/ Washer/Gaskets
14 ProductsCotter Pin
Cotter Pin is a simple yet essential mechanical component, also called a split pin, typically made of metal in a "U" or "L" shape. It is used to secure bolts, pins, or other parts, preventing them from loosening or disengaging due to vibration or movement. Known for its simplicity, low cost, and high reliability, the Cotter Pin is widely used in automotive, agricultural machinery, and industrial equipment, making it a critical safety fastener in mechanical assemblies.
5 ProductsPipe & Pipe Fittings
Pipe and pipe fittings are essential components in plumbing and industrial systems, used to transport fluids, gases, and other materials. Pipes are hollow cylinders designed to carry substances, while pipe fittings are connectors that join pipes, change direction, or adapt to different sizes. Common fittings include elbows, tees, couplings, and valves, which ensure a secure and leak-proof system. To further secure connections, hose clamps are often used to tightly fasten hoses or flexible tubing to fittings, preventing leaks and ensuring stability. Made from materials like metal, plastic, or composite, pipes, fittings, and hose clamps are selected based on factors such as pressure, temperature, and the type of material being transported. They are widely used in construction, water supply, oil and gas, and HVAC systems.” JLCMC offers a comprehensive range of standard plumbing supply solutions, delivering durable and high-performance components to meet diverse needs.
52 ProductsGraduated Ruler
Choose from the selection of graduated type rules
8 ProductsGrease Nipple
Our Grease Nipple, crafted with precision and durability in mind, is designed for efficient grease flow and minimal leakage. Ideal for various machinery and equipment maintenance, it ensures smooth and reliable lubrication. Made from high-quality materials, it offers excellent resistance to corrosion and wear, standing up to the demands of industrial applications. Widely used in construction machinery, automotive parts, and industrial equipment, it enhances the longevity and performance of moving parts. Shop for your Grease Nipple at JLCMC and enjoy a seamless, cost-effective, and efficient purchasing experience.
5 ProductsContact Probes
Contact Probes are precision contact components used in electronic testing, wire harness inspection, ICT testing, PCB testing, battery testing, and automated test equipment. JLCMC offers a wide range of contact probes and related accessories, including wire harness test probes, ICT test probes, high-current probes, low-current probes, switch contact probes, rotating contact probes, insulated probes, pogo pin contact probes, double-ended probes, probe receptacles, and terminals. These contact probes support stable electrical contact, signal transmission, position detection, and electrical performance verification in test fixtures and inspection systems. They are widely used in automotive electronics, wire harness manufacturing, PCB production, IC testing, lithium battery production, consumer electronics, and industrial automation equipment. By selecting the proper probe type, receptacle, spring force, stroke, plating, and mounting size, engineers can improve test reliability, contact stability, and maintenance efficiency.
7 ProductsIndustrial brushes
Industrial brushes for cleaning, polishing, deburring, surface treatment, and industrial applications.
12 Products