This spring is ideal for most M3 and M4 extruders setups for 3D printers. It has a long compression length for fine adjustment of the spring force and can build up to 1,6 kg of compression force per spring.
Dimensions & Force:
inner diameter: 4.37 mm (passend für M3 und M4 Schrauben)
outer diameter: 5.63 mm
spring wire diameter: 0,62 mm
length: 18.50 mm
compressed length 7,65 mm
force of compressed spring: 16,37 N
Normally you will need 2pcs for each extruder.