131-9663 – Toro Carriage Screw (Genuine Toro OEM Part) The Toro 131-9663 is a genuine OEM carriage screw, designed to provide secure, vibration-resistant fastening on compatible Toro lawn and turf equipment. Carriage screws are commonly used where a smooth, rounded head is required on the exposed side, while the square neck beneath the head prevents rotation during tightening. Manufactured to Toro original equipment specifications, this carriage screw is produced from durable, high-strength steel to ensure reliable clamping force, proper fitment, and long service life in outdoor operating conditions. Using a genuine Toro fastener ensures correct thread engagement and factory-approved assembly integrity. Product Details Manufacturer Part Number: 131-9663 Brand: Toro Part Type: Carriage Screw Category Code: 1C System: Deck / chassis / component mounting assemblies Function: Secures components while preventing fastener rotation Material: High-strength steel with protective finish OEM Status: Genuine Toro OEM replacement Function Provides secure fastening with a smooth, low-profile head Prevents rotation using the square neck design Maintains proper alignment of mounted components Compatible With Toro Equipment The Toro 131-9663 Carriage Screw is used on select Toro lawn and turf equipment, commonly found in: Mower deck assemblies Guards, brackets, and panels Chassis and structural mounting points (Exact compatibility depends on the specific Toro model and application.) How It’s Used This carriage screw installs through a square-necked mounting hole, where the square section locks into place to prevent spinning. A nut is tightened on the threaded end to secure the component firmly in position. Proper torque ensures secure fastening and long-term reliability. Suggested Maintenance Inspect the screw during routine service for corrosion or thread damage Ensure the square neck seats fully to prevent rotation Replace the screw if threads are stripped or the head is damaged Use genuine OEM hardware to maintain factory specifications The Toro 131-9663 Carriage Screw is used in OEM-specified Toro assemblies where secure fastening, durability, and correct component alignment are essential.
