RS PRO Steel Extension Spring, 87.7mm x 17mm

RS PRO Steel Extension Spring, 87.7 x 17 mm

Keep large objects attached while allowing them to be pulled apart for a limited distance using this RS PRO steel extension spring. It's made from high-strength piano wire, so it can handle large pulling forces and heavy items.


The spring's carbon-steel material resists rust and corrosion, making it suitable for humid or outdoor environments. The coil design helps store potential energy, returning linked objects to their original position once the pulling forces are released.


You can install this spring by simply attaching a hook or clip to one of the closed loops at either end for a quick and secure join. Springs like this are frequently used to attach the bounce mat to the steel frame of a trampoline or to aid in lifting domestic garage doors.

Features and Benefits

• Free length of 87.7 mm


• Initial tension of 74 N (Newtons)


• Steel material


• Maximum extended length of 224.7 mm


• Outside diameter of 17 mm


• Spring rate of 0.46 N/mm


• Wire diameter of 1.6 mm