Parts for Troy-Bilt 21A-664D063: Engine / Support Bracket / Pulley / Belt Parts

This lock washer is used frequently for a number of applications on power yard equipment. The size, 5/16, is the default for many small engine housing and manifold applications. Lock washers are used with machined bolts to fasten engine blocks to the housing of the equipment being used. The compressed washer is able to handle the constant vibration of the small gasoline engine without losing the seal between the screw or bolt and the housing. Typically these lock washers only need to be replaced when they are misplaced during repairs or when the screws that attach them have to be chiseled or cut away, meaning the washers are destroyed as well. These OEM certified replacement washers have been manufactured to the same specifications as the originals they are replacing. In addition to lawn mowers, lock washers of this type and size are frequently used on blowers, lawn tractors, cultivators, snowblowers, and trimmers. Brands compatible with this type of washer are Murray, Husky, Poulan, Bolens, Yard-Man, Cub Cadet, Troy-Bilt, Yard Machines, MTD, and Ryobi.

This is a flange nut that can be used in a variety of lawn and garden equipment from different manufacturers. The nut is made of metal, measures 5/16x18, and is used to secure components in place. It also assists with preventing backing out caused by vibration. Over time, the flange nut can become damaged and will need to be replaced. If the flange nut in lawn and garden equipment has become damaged, is loose, or gets lost, then replacement is required. The level of difficulty of replacing a flange nut depends on which parts it's securing and what kind of equipment it is installed on. This flange nut is an OEM replacement part that can be used with lawn mowers, snowblowers, wood chippers, tillers, log splitters, leaf blowers, and edgers by MasterCut, Craftsman, Yard-Man, Toro, Bolens, Cub Cadet, Montgomery Wards, Ryobi, Huskee, Troy-Bilt, MTD, and Yard Machines. It is sold individually and will require a wrench or socket for installation.

Screw hex caps are found on lawn equipment and other small machines. Over time, with the machine's use or following accidental damage, a screw hex cap may break or become loose. In order to continue safely operating the machine, the part must be replaced. A missing or damaged screw hex cap can cause the equipment to move in unpredictable ways. Check for excessive vibration or noise.Always wear gloves for protection when replacing parts on lawn equipment. Tools required may include a socket set, wrench set, and a screwdriver. Screw hex caps are quick and easy to replace. Make sure that the replacement screw hex cap is installed correctly and properly secured for a tight and long-lasting fit.This screw hex cap is an authentic OEM replacement part. It is supplied by the manufacturer. The replacement screw hex cap is made of durable metal and is gold in color. The replacement piece can be used in a variety of machines, including chippers, shredders, cultivators, edgers, lawnmowers, lawn tractors, and snowblowers. The screw hex cap is compatible with Husky, Cub Cadet, Ryobi, Bolens, Yard Machines, Yard-Man, Troy-Bilt, and MTD. It is sold as an individual unit.

This part is a replacement hex bolt. This is a genuine OEM part made by MTD and has been sourced directly from the manufacturer. This part can be used to replace a broken, stripped, or lost hex bolt in a variety of outdoor power equipment models. Hex bolts are a standard piece of equipment hardware named for their hexagon-shaped head. They are critical for securing together different equipment components but can easily become corroded, stripped, lost, or otherwise ineffective, requiring replacement. When working on or near any mechanical equipment, it is important to verify that it is powered off and completely cooled down before starting any repairs. For more accurate information on how and where to install this hex bolt, the appropriate owner's manual and equipment diagrams should be referred to. As an authentic replacement part, this hex bolt is suitable for use on several different models of outdoor power equipment manufactured by MTD, Craftsman, and other brands. This is a genuine part made of high-quality, durable metal and is sold individually.

This screw is used on a variety of lawn and garden equipment from many manufacturers. This hex screw is a large bolt that has a six-sided head that can be used to fasten metal to wood or wood to wood. This type of screw is unique from traditional screws because the bolt head needs to be held with a socket while a second wrench is used to tighten or loosen the part. The bolts have a smooth shank and small threads. These screws can break or become damaged and no longer do their job. When that happens, they will need to be replaced. A hex key wrench can be placed into the slot of the screw and turned counterclockwise to loosen up the bolt. The replacement hex screw can then be placed in the original hole to adhere parts together on lawn equipment. This is a genuine replacement OEM screw that is commonly used on Craftsman, Toro, Murray, MTD, Yard Machines, Troy-Bilt, Bolens, Yard-Man, MasterCut, Cub Cadet, and Huskee lawn mowers, log splitters, snowblowers, chainsaws, tillers, and string trimmers. The screw is sold individually and made of durable metal.

This screw is used on a variety of lawn and garden equipment from many manufacturers. This hex screw is a large bolt that has a six-sided head that can be used to fasten metal to wood or wood to wood. This type of screw is unique from traditional screws because the bolt head needs to be held with a socket while a second wrench is used to tighten or loosen the part. The bolts have a smooth shank and small threads. These screws can break or become damaged and no longer do their job. When that happens, they will need to be replaced. A hex key wrench can be placed into the slot of the screw and turned counterclockwise to loosen up the bolt. The replacement hex screw can then be placed in the original hole to adhere parts together on lawn equipment. This is a genuine replacement OEM screw that is commonly used on Craftsman, Toro, Murray, MTD, Yard Machines, Troy-Bilt, Bolens, Yard-Man, MasterCut, Cub Cadet, and Huskee lawn mowers, log splitters, snowblowers, chainsaws, tillers, and string trimmers. The screw is sold individually and made of durable metal.

This center hex nut is a genuine MTD part, sold individually. This center hex nut can be used as a replacement part in lawn mowers, snowblowers, tillers, leaf blowers, edgers, log splitters, and wood chippers. The purpose of the center hex nut for one of these small engine outdoor appliances is to work in conjunction with a bolt to provide a fastening component for one or more parts within the internal mechanisms of the appliance.The center hex nut might need to be replaced if the small fastening component is lost, misplaced, or damaged within the typical lifespan of the small engine outdoor appliance in which it has been installed.This component is a genuine OEM replacement part sourced directly from the manufacturer. It is sold individually. This center hex nut is compatible with the following outdoor appliance brands: MTD, Craftsman, Cub Cadet, Troy-Bilt, Husky, Yard Machines, Huskee, Montgomery Wards, Yard Man, and MasterCut.