7021: TSR 0,5X6X5X2,75

All dimensions are in mm
Dt = Wire diameter
Di = Inner diameter
nv = Number of sprung coils
A = Leg length
Lo = Length
Mn = Maximum permitted torque Nmm
φ = Torque angle at Mn
c = Rate, Nmm per degree
Material: Stainless steel EN 10270-3-1.4310
1 kp = 9.80665 Newtons, 1 Newton = 0.10197 kp