Die Spring: 1" Hole Dia, 1/2" Rod Dia, 5" Free Length, Blue MPN:103-520

This die spring features a one hole diameter measuring at 1 inch with a 1/2 inch rod diameter and comes pre-compressed by five free lengths for ease of use in your various die setting applications. Manufactured from carbon steel, these die springs have been tempered to increase their strength against fatigue and provide excellent memory retention during cycling operations. Their blue finish adds an additional layer of protection against corrosion while maintaining a visual indicator of wear over time making them ideal for use in mold & die manufacturing, stamping dies or other precision mechanical applications where precise compression settings are required to ensure proper operation and performance.