The Shoulder Bolt (size: 3/8 16 x 3/4) is a black, metal, individually sold part. It can be installed using a wrench or socket. This part is used to secure other parts in place. You'll know if it needs to be replaced if the part is coming loose. This means it is damaged, likely due to fatigue/wear/damage. Refer to your make, model and diagrams to ensure you're picking the right part.

This centerlock nut, or lock nut, is sold individually and locks itself in place when inserted, to prevent it from backing out due to vibration. Over time, due to its strenueous job, it may become loose or break due to wear and tear, and will need to be replaced. This lock nut is made of metal and is silver in color. When it will no longer lock, you will need to complete this easy repair, which requires a wrench or socket and torque wrench. Ensure you torque the lock nut to your manufacturer specifications; this nut can have a range of different applications for a variety of equipment, so please check your model number or owners manual to be sure it is the right fit for your model.

This 5/16-18 wing knob is sold individually. It is a plastic part, black in color, that works on a variety of equipment. Its general function is to allow you to quickly loosen, remove, or fold down things such as handles. If it no longer loosens or tightens, it may be broken or damaged due to fatigue and wear. Replacing this part is an easy repair that does not require any tools.

This mandrel housing is for lawn tractors. Mandrel housing houses the shaft that spins the blade. Wear work gloves to protect your hands when installing this part.

The hair pin is a silver, metal pin used to secure and lock parts in place. If broken, the part being secured will come loose and the pin should be replaced. This is an OEM part directly from the manufacturer. Most customers rated the replacement of the hair pin as an easy repair.

The Blade Adapter is used to connect the mower blade to the base of the mower deck. The part is individually sold, silver metal, and measures approximately 2 inches in diameter. Installation requires a Wrench or Socket and is rated as "Easy". If damaged (likely due to fatigue and general wear) there maay be a vibration or rattling sound from it coming loose. Refer to your make, model and diagrams to ensure this is the correct part.