Mastercut Parts

Replaces worn, dull, or damaged 21-inch mulching blades on walk-behind mowers. Features curved design for effective mulching. Upgrade your rusty blade.

Secures pins and shafts on lawn tractors and riding mowers. Replace if bent, missing, or worn. Bow-tie design inserts through pre-drilled holes.

Spindle assembly for lawn tractor mower decks. Connects blade to drive belt for cutting operation. Replace if cracked, worn, or damaged bearings.

Flange lock nut secures components on mowers and outdoor power equipment. Replace if stripped, corroded, or missing to restore proper fastening.

Side discharge chute for walk-behind mowers. Directs grass clippings away from mower deck. Replace if cracked, broken, or missing to prevent clogging.

Hex bolt secures blade adapter and other components on lawn mowers. Replace if bolt is stripped, damaged, or missing to properly fasten parts.

Hex screw for lawn mowers, tractors, and snow blowers. Replaces worn, corroded, or missing screws on engines and housings. Identical fit for secure assembly.

This is a flanged lock nut. It’s designed to apply tension, typically on a joint that needs to have a certain amount of flex. As such, it’s mostly used on snowblower chutes and lawnmower handles. They can remain in place, but with a forgiving connection that can take a beating. The nut size is 3/8, with a thread size of 16. A lock nut will generally last for many years. However, the silicone ring inside will wear down if it’s frequently tightened and loosened. It needs to be replaced when it will no longer reliably remain in place. Generally, this begins as a symptom of slight slippage and worsens as time goes on. Thankfully, whether it’s being used on a snowblower or a lawnmower, this nut is generally straightforward to access. Simply unscrew the old nut, then screw the new nut on until it’s nice and tight. Our flanged lock nuts are genuine OEM MTD nuts, and they are sold individually.

Replace a broken torsion spring causing handle slack or engagement issues on your lawn mower. Common DIY repair restores proper tension and operation.

A carriage bolt is a type of fastener. It features a smooth rounded head and a square domed top. It has threading, which leads to up to the square shoulder. The purpose of its square is to prevent the bolt from spinning. Once the carriage bolt is inserted through the hole, using a nut and washer can provide additional security. Carriage bolts can corrode and loosen over time. Since it doesn't have a slotted head, a socket wrench is needed when replacing. This bolt carriage replacement is compatible with wood chippers, tillers, string trimmers, lawnmowers, and edgers. It is a genuine MTD product that measures 5/16x.075. It has a smooth rounded head and square shoulder underneath it. This carriage bolt is sold individually.

Replaces a stripped, damaged, or missing 5/8" hex flange nut on your lawn mower or snow thrower. Secures blades and other components with integrated washer.

A flange lock nut, also known as a flange lock or a lock nut, is created to be used in various types of lawn and garden equipment. This flange lock nut holds other parts in place and, when properly threaded, will resist loosening. Over time, a flange lock nut may begin to weaken and may become loose or break. If it appears to be broken or weak, a replacement is required. Flange locks can be adjusted and uninstalled after use. When replacement is required, you may need a socket set, screwdriver, hacksaw, and butane torch. The socket wrench will loosen the bolt it is connected to, while the torch is used to heat the lock nut. A socket wrench may remove the nut, but sometimes cutting it with a hacksaw is required. This flange lock nut is a genuine OEM component directly from the manufacturer and comes in an individual unit. It is made of metal, a gold color, and can be found in various areas of lawn equipment. It works with lawnmowers, trimmers, snowblowers, cultivators, tillers, and leaf blowers by Poulan, MTD, Toro, Cub Cadet, Murray, Troy-Bilt, Bolens, Yard Machines, Craftsman, and Yard-Man.

Attaches to the back of your walk-behind mower deck to prevent grass and debris from reaching the operator. Replace if cracked, broken, or missing.

Hinge pin fastener for lawn mowers. Secures moving components and panels. Replace if bent, missing, or damaged to restore proper attachment and function.

Mower won't start even with brake engaged? A faulty interlock switch blocks current to the starter. This safety switch replacement restores starting function.

Replace your lawn mower's side discharge chute if it's cracked, broken, or missing. Attaches to the side of the mower to direct grass clippings away.