Specification: Description: Made of good quality metal, features high elasticity and good precision, installed small size and generate strong force. This Compression Spring is widely used in the punching moulds, metal die-casting moulds, plastic injection moulds and mechanical equipment with rigid structure. F A Q: What is Hole Dia? What is Rod Dia? Hole Dia:The Diameter of the Hole on the mould ,i.e.the Outer Diameter of the spring Rod Dia: The Diameter of the Rod that is to be inserted into this spring, i.e.the inner Diameter of the spring.
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