●Back drilling
This design is the best choice for a small size connector. The small size can meet the elasticity requirements of customers, because the spring length of this design can exceed the length of the needle tube. In some cases where space is limited, The needle shaft is hollowed out to get more spring assembly space, so stable spring force and relatively more compression stroke can be obtained for customers to choose. To
1. Easy turning and low cost
2. Can strive for space for spring placement
3. Shorten the height of the product
4. The phenomenon of no pin stuck in static stat