Bifold Door Pin Cap

Hello, I got these grommets (21-163) for my bi-fold doors, but they don't seem to fit the guide pin. Is there a bigger size available? Thanks in advance!

I looked at part no. 21-007 bifold door guide pin assembly, and what i need is the plastic cap that goes on the end of the pin that slides in the bottom track when you open the bifold door. The plastic cap is worn out so that now it makes a grinding noise because it is metal on metal. Do you sell j ... (cont.)

Help! Nothing on your site looks exactly like this part from my bedroom closet. I've lived here over 13 years and it was taped like this before I moved in, but it's broken beyond a tape fix. (Condo was built in 1981 and these are original). The door won't stay in the track and flys open and is basi ... (cont.)

I need 5/16 "ID Do you carry this size? If not, any suggestion where I can get that size?

Attached are pictures of my 72