The Welger 1105290815 Z needle is a genuine OEM replacement part specifically designed for various Welger AP series square balers. This essential component plays a critical role in the baler's knotting mechanism, ensuring precise and consistent knot formation for high-quality bales. Manufactured to original specifications, it offers exceptional durability and reliable operation in demanding agricultural conditions. This Z needle is a direct fit for models such as AP41, AP45, AP50, AP51, AP52, AP53, AP61, AP63, AP71, AP73, and AP83. It is also cross-referenced with Massey Ferguson part numbers 3613271M1, 3613271M91, and 3613271M92.