Upgrade your equipment with the GENUINE MACK BALL JOINT 671AM1, a NEW OEM part with a 3/4" -16 THD that's perfect for heavy-duty applications. Find it at bboverstock-salvage.com where you can enjoy unbeatable prices—Why Pay More. Most orders ship the same day, and we ship 6 days a week to get you what you need fast. As a small family-run business, we take pride in delivering quality and reliability to our valued customers. Choose BB Overstock & Salvage for all your industrial, commercial, and construction equipment parts and tools.