Stainless Steel Round-Loop & Short-Leg Precision Torsion Spring
One end loop for hook mounting and one end short leg for positional support, delivering stable torque in a compact multi-coil body for latch and consumer product open-close return functions.
Precision cold-wound from SUS304 stainless steel wire as a single integral unit, the multi-coil tightly wound body stores substantial torsional energy within a minimal footprint. The small round loop end enables hook or pin mounting, while the short straight leg with a small bent tip rests against a stop plate or seats into a shallow slot for precise positioning, preventing spring migration. The two end forms work together in a clear functional division — "loop for force transmission + short leg for positioning" — simple yet highly efficient. The stainless steel body requires no coating and provides corrosion resistance for long-term high-frequency use in consumer goods and precision devices.
Loop end for pin or hook mounting, short leg for positional support — flexible and efficient assembly.
Multi-coil compact design stores sufficient torque within a minimal footprint to save installation space.
SUS304 stainless steel body with natural corrosion resistance — no additional surface treatment needed.
Stable linear torque output with excellent fatigue resistance under high-frequency open-close cycling.
Coil count, wire diameter, outer diameter, and arm length fully customizable per drawings.
Left-hand or right-hand winding available to match different return directions.
Application areas: Door lock latch spring return / Eyeglass frame spring hinges / Small industrial snap-fit opening mechanisms / Hair clip and stationery spring elements / Consumer electronics flip-cover return
