Hexgonal nut for tension spring bolt, hook

Listed on the following equipment:
LifeSpan - C3-08 - (U**A)
LifeSpan - C3-DT - (BE**A)
LifeSpan - C3-DT - (BE**B,C3D)
LifeSpan - C3i - (AK**B)
LifeSpan - C5i - (CU**A,C5X)
LifeSpan - C7000i - (AW**A)
LifeSpan - Cycle Boxer - CB110 - (DR**A)
LifeSpan - R3i - (AJ**B)
LifeSpan - R5i - (CV**A,R5X)
LifeSpan - R7000i - (AV**A)
LifeSpan - S1 - (AL**A)
LifeSpan - S2 - (R**A)
LifeSpan - S2 - (R**B)

* Images may not be identical to part.