Carbon steel Fed Std. #66, AISI identification #C1010, C1011, C1012 or C1013; 60,000 psi minimum tensile strength. Cadmium plated finish per Spec. QQ-P- 416 Type 2, Class 3. Can be used as a replacement AN526. Old AN 515 number.
Pilots HQ responded promptly to my order. They were delivered on time and pricing was reasonable. I would order from them again. Top notch company, very professional.