Steel spring/reinstated spring/knocking needle spring/steel cable

Current status and development direction of spring steel

Heavy Springs (Compression Springs)

Flat Wire Springs / Shaft Springs / Plate Springs

Spring Steel

uxcell 2Pcs Extended Spring 3/8 inch x 6-1/2 inch, 0.047 inch Spring Steel Dual Hook Tension Springs for Machinery Construction Industrial: : Industrial & Scientific

How to make Coil Springs from a Steel rope/cable wire by hand!

Single Layer Wave Springs

Hard Drawn Carbon Steel Spring Wire in Coils and Spools

British Hook Tension Springs

Compression Springs

Wire Diameter 0.4 Spring Steel Hook Tension OD 3mm / 4mmspringtelescopic Spring