Key Component Terms (Bolts): Bolt Body: The main cylindrical shaft with external threads Head: The non-threaded top portion used for tightening Shank: The smooth section of the bolt between the head and threads Thread Pitch: The distance between adjacent threads. Grade Mark: Indicator of tensile strength Key Component Terms (Nuts): Nut Body: The main housing with internal threads matching the bolt's pitch Wrench Face: The flat surface where a wrench grips to tighten or loosen Flange: An optional integrated washer-like surface for improved load distribution Locking Feature: Special design to prevent loosening.