RockJock's 1/2 in.-20 left hand thread female heim joint with 1/2 in.-20 stud, as used in their Antirock sway bar kits. Zinc plated finish.
Antirock® Sway Bar Kit; Sway Bar Heim Joint [1/2 in. 20 Stud; 1/2 in. 20 Female LH Thread];
RockJock Antirock Sway Bar Heim Joint 1/2in-20 Stud 1/2in-20 Female LH Thread
Antirock® Sway Bar Kit
Sway Bar Assembly