Hello, Does anyone know the correct term for the contents of this kit, and their use? Knurled washers, varying i.d.'s & o.d.'s , all appear to be the same thickness. Thanks, Lou

 I have only seen them called knurled washers.  they are easy to hold in place at hard to reach places.
they also make knurled face washers that act as lock washers.

They are knurled bushings which explains the part # KB-***.  I see Stens and Oregon bushings listed on eBay but I can't find them in either of their current catalogs.
Al

(Edit)  They are blade bushings - not sure but it looks like they are for gas engine cut-off saws.

Hello, Frank & Al. Thanks for the replies. I took these to a local fastener company for ID, and they were not sure either. One thing found is that the knurling does not go all the way through on one of the flats, so these are probably meant to be pressed in, and to stop at the rim???? Thanks, Lou

Hello, Al. I followed your lead, they are Blade Bushings,looks like the most common use is a lawnmower part. Thanks, Lou