our PPWBK4 is the kit you need to replace tie / through bolts, washers and nuts on the 40-28, 40-28D Cleveland main wheel. Cleveland recommends replacing the bolts every 4-5 tire changes. Our kits puts everything in one lost cost kit to save time looking up the correct parts. This kit supports the following aircraft models using the above main wheel, be sure to consult your manual to ensure this is the nose wheel for your application as there are often multiple wheels used by the OEM. American Champion Aircraft 7ACA, 7ECA, 7GCAA, 7GCBC, 7KCAB, 7SRS, 8KCAB, Piper PA28-140, -150, 180. Bolts, washers and nuts for 1 wheel assembly.