Product Description
SEMS are created by
combing a bolt with a permanently affixed washer. This washer stays in place due to the fact that it is installed on the blank bolt before the thread rolling is conducted. Because the treads are larger than the initial diameter, the washer stays in place without falling loose from the bolt.
Outstanding Corrosion ResistanceSems screws are engineered to withstand harsh environments thanks to their advanced surface finishes, such as zinc plating, nickel plating, and black oxide. Combined with the use of high-quality materials like stainless steel and alloy steel, these fasteners deliver superior rust protection and longevity, making them suitable for critical applications in automotive and electronics industries.
Versatile Applications and CustomizationDesigned to meet diverse industry requirements, Sems screws are available in a wide range of standard and custom sizes, head shapes (pan, hex, truss, or custom), and washer configurations. Their excellent torque capacity and tight tolerances allow for reliable, high-performance fastening in machinery, automotive parts, electrical equipment, and more.
Enhanced Efficiency with Pre-Assembled WashersEach Sems screw features either a spring washer, flat washer, or both pre-assembled, greatly reducing installation time and minimizing handling issues. This integration ensures consistent assembly quality and improved productivity, making them a preferred choice for high-volume manufacturing environments.
FAQ's of Sems Screws:
Q: How do Sems screws improve assembly processes?
A: Sems screws come with a captive washer (spring, flat, or both), pre-assembled onto the screw, which reduces the number of parts to handle and speeds up the installation process. This integration minimizes the risk of losing washers and ensures consistent, reliable assemblies-ideal for large-scale manufacturing.
Q: What materials and surface finishes are available for Sems screws?
A: Sems screws are made from carbon steel, stainless steel (A2, A4), and alloy steel, and can be finished with zinc plating, nickel plating, black oxide, or left plain. These options provide excellent corrosion resistance and enable use in demanding environments.
Q: When should I use coarse versus fine threading on Sems screws?
A: Coarse threading is suitable for heavy-duty and rapid assembly into softer materials, while fine threading is preferred for precise fastening and better hold in harder materials or applications requiring fine adjustments. The choice depends on the specific material and strength requirements of your application.
Q: Where are Sems screws commonly applied?
A: Sems screws are frequently used in automotive manufacturing, electrical equipment, machinery assembly, and electronics due to their high torque capacity, excellent corrosion resistance, and reliable washer integration. Their RoHS compliance also makes them suitable for electronic and electrical applications.
Q: What benefits do the various head and drive types offer?
A: Sems screws are available with pan, hex, truss, and custom head shapes, matched with Phillips, slotted, hex, or combination drives. This flexibility allows users to select the optimal configuration for their assembly tools and access requirements, ensuring secure and efficient fastening.
Q: What is the minimum order quantity for Sems screws, and can I request customized packing?
A: The minimum order quantity for Sems screws is 1,000 pieces. Packaging can be provided in bulk or tailored to your specific requirements, ensuring convenient handling and distribution.
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