This aftermarket replacement Collar Kit, part number 435000323RNO, is designed as a high-quality alternative for Bondioli & Pavesi PTO (Power Take-Off) drive shafts. Specifically engineered to be compatible with Bondioli & Pavesi S4, S5, S6, and S7 series PTO shafts, this kit ensures reliable connection and operation in various agricultural and industrial applications. The collar kit features a RT 1"3/8 Z6 specification, indicating its precise dimensions and spline configuration for secure fitting. Crafted to meet the demanding requirements of heavy-duty machinery, this non-OEM alternative provides a durable solution for maintaining the integrity and performance of your PTO system. It is an essential component for securing the PTO shaft, preventing disengagement during operation, and ensuring efficient power transfer from the tractor to the implement. Opting for this compatible replacement collar kit helps restore the functionality of your Bondioli & Pavesi PTO shaft, offering a cost-effective solution without compromising on critical operational parameters. Ideal for repairs or maintenance, this kit is a practical choice for agricultural professionals seeking dependable aftermarket parts.