The M-35 is the Parachute Shroud Line bushing that goes in the antirotation assembly. For all M-40 assemblies and M-4766. The bushing is made from 1" RD 6061 aluminuml and measures 1/2" I.D., 1" O.D., and length is 1.879". There is a pdf chart that can be downloaded from our website, http://mckinneycorp.com/downloads/pdf/bushing.pdf, that will give you a list of some of the bushings that we carry. Should you not be able to find the bushing that you're looking for, call and we'll be happy to assist you in finding what you need.