caps on the end of valve stems of 18.5 Briggs & Strattons

just wondering on the video of putting one back together it shows that there were
caps on the end of the valve stems and warning not to lose them
......but I don't recall mine ever having any ?
now I was wondering if they made a change , cause I noticed that various tabs that
held wires in place on the video were metal and mine are all plastic ?
So mine never had caps ?
Thanks for any clarification
Normf