M3x12 Light duty spring pin ISO8751 elastic cylinder pin coiled spring pin spirol black phosphated roll pin coiled parallel pin cotter pin spiral pin

A coiled spring pin, also known as a spiral pin, is a self retaining engineered fastener manufactured by roll forming metal strip into a spiral cross section of ​ 2 1⁄4 coils. Coiled spring pins have a body diameter larger than the recommended hole diameter and chamfers on both ends to facilitate starting the pin into the hole, the spring action of the pin allows it to compress as it assumes the diameter of the hole. Often referred to as a 'spiril' pin in the Midlands.

When coiled spring pins are installed, the compression starts at the outer edge and moves through the coils toward the center. Coiled pins continue to flex after insertion when a load is applied to the pin thus providing excellent performance to counter fatigue in dynamic applications.

Standard duty coiled spring pins offer the best balance between flexibility and strength and are recommended for most applications.

Heavy duty coiled spring pins are typically used in high shear strength applications and hardened host materials.

Light duty pins are used in applications with soft metals and plastics holes where there is a high risk of enlarging or breaking the host using a traditional press fit solid pin.

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FAQ

Q: Are you trading company or manufacturer?

A: We are factory.

Q: What is your payment method?
A: T/T. For small order less than 1000USD, 100% in advance to reduce the bank charges. For order more than 1000USD, 30% in advance and balance before shipment.

Q: Can you provide a sample?
A: Yes, our sample is provided free of charge, but not including the cost of freight.

Q: What's your delivery time?
A: Generally 15 days if the goods are in stock. If not in stock we’ll need 30 working days to produce. It depends on quantity.

Q: How to Custom-made?
A: If you have a new product drawing or a sample, please send to us, and we can custom-made for you. We will also provide our professional advices of the products to make the design to be more realized & maximize the performance.

Q: Which mode of transport would be better?
A: In general, we advice to make delivery by sea. Also we respect your views of other transportation as well.