SATO RACING Store › Flange Lock Nut M8S [FLNT-8S] Image 1 of 1 Flange Lock Nut M8S [FLNT-8S] $2.50 Stainless steel M8 size Flange Lock Nut (low head) (part# FLNT-8S), for use with specified Sato Racing Rear Sets models. Get notified by email when this item is in stock again. Quantity: Add To Cart Added! Stainless steel M8 size Flange Lock Nut (low head) (part# FLNT-8S), for use with specified Sato Racing Rear Sets models.