There are lots of manufacturers in the automotive industry which have revamped or ramped up on their OEM distribution. This means original equipment manufacturer and it is related to the availability of components for all sorts of transports and heavier machinery. Some of the latest innovations for this is more intensive customer service for repairs and maintenance.
The availability of some installs within machines is often the key item for replacement. Things like Late Model Used Heavy Truck Parts are distributed through support networks which ideally work for their specific sectors. So the heavy duty items are often there on a sector all their own which is usually accessed only by those who have connections to the industries here.
Logistics concerns, freight forwarding and warehousing and storage may all need some parts replaced every now and then for their fleets. Also, construction sites, mining concerns, and public works will often use the machines for transport. Trucks may also have beds that may be specific to towing, crane platforms, and telescopic arms for reaching higher places.
The number of models or brands that need OEM these days are varied. The types of machines are also varied and this means that distributors can either franchise for one or be an independent that is recognized by many companies because of the value of the business. Independents can also stock on secondhand items or even those new parts that are OEM.
Manufacturers of course know that they can help extend the service lives of so many units just by constantly manufacturing OEM parts. These may be relevant to usage but most of the advanced in the trades here can often be useful for a lot more years than most them are actually used. There is usually a concern for these to be broken in too.
Breaking in new units will often require users or owners to call in their contacts for the used parts. And there are shops which could actually create used items by simply operating them. This is because most components in brand new units could need to be smoothed and less sharp so they are able to move with other components well.
So some distributors could specialize in producing these items without the ambient damage that is provided when these are actually used. Heavy duty means heavy duty and sometimes some engine or body items simply get broken without much ado when the going gets rough. The process for processing secondhand items will not have this kind of pressure.
So the things needed will be available without any more damage or no damage at all. The necessity is simply for smoothing out the rough or sharp edges so that these will not interfere with any sensitive engine process. These materials could be machined although that is a more expensive process or not at all precise to the job.
There are lots more stuff that are needed like this. It takes some experts to do the smoothing out. And for the money these are the best things that can be used for all sorts of operations on this field.