Thank you! I’ve looked everywhere for what this was since it’s been about a year since I’ve reupholstered my bench seat... nobody knew what I was talking about... I just ordered today...almost done with the bird, but the seats were holding me back.....SpzcdZa 260pcs (7 size)Internal Tooth Starlock Washers Locking Washer Assortment Kit, Push On Speed Clips Fasteners Assortment Kit,Quick Speed Locking Washers,Black Oxide Finish65Mn Black Oxide Finish https://www.amazon.com/dp/B07MHC5GHS/ref=cm_sw_r_cp_apa_i_e-KgEb0HK2H9N