DIY Supplies: Woodworking Origin: Mainland China Certification: NONE 1. The locking screw blocks the screw in the threaded hole so that the screw does not loosen if it is jolted. 2. Due to the certain elasticity, the load on the thread can be more uniform, the deviation between the pitch and thread hole pitch and the tooth shape can be eliminated, and the vibration can be absorbed, thereby improving the thread joining strength and fatigue resistance. 3. Avoid loop lines, false teeth, and get good joint performance, especially for airplanes and other products that require a high insurance factor to improve suture life. 4. High strength, high hardness, durable. 5. Used in a variety of low strength materials to improve the wear resistance of screw connections and prevent thread damage. Material: Stainless steel Dimensions: Inner diameter x pitch x length, 2D = 2 x inner diameter Example: M8 (8mm screw diameter) * 1.25 (with a pitch of 1.25mm after installation) * 2D (length after installation 8 * 2 = 16mm) Package includes: 20 pcs Note: The length of the wire screw sleeve after assembly (i.e. the effective screw hole depth) = inside diameter * D Satisfaction Guarantee Our first priority is to provide you with an easy, pleasant, and anxiety-free shopping experience. We try our best to give a clear, candid, and complete description of our products and their conditions. We are always ready to help if you have questions or encounter a problem. If for any reason you are not satisfied with a product or service, please do not hesitate to contact us. It is very important that you have a positive & 5-star transaction with us. We accept refund if product is not as described. If the goods are damaged, please provide photos. We can give you a full refund or send you a new item. If the product is lost or the wrong number is received, or if we make a mistake, we accept partial refund compensation. After receiving the payment, we will send the goods within 12 hours.