(e.g., AN3-7) determines the length. A "long" version would be indicated by a higher dash number, such as an AN3-7 , which has a total length of approximately 25/32 inch (0.781 inches) and a grip length (the unthreaded portion) of 7/32 inch . Key Characteristics of AN3 Bolts
: Typically cadmium plated (silver-yellow appearance) for corrosion resistance. AN3.7z
: Often feature an "X" or asterisks on the head to identify them as aircraft-grade. Variations : such as an AN3-7
: Indicates an undrilled shank (used with self-locking nuts). "H" Suffix : Indicates a drilled head for safety wire. "C" Suffix : Indicates stainless steel material. AN3.7z