6318ZNRC3/P0/00Q Nachi Bearing With Snap Ring and Shield Made in Japan 6318ZNRC3/P0/00Q Nachi Bearing With Snap Ring and Shield, the 6318ZNRC3/P0/00Q inner diameter is 90mm, the 6318ZNRC3/P0/00Q outer diameter is 190mm, 6318ZNRC3/P0/00Q width is 43mm.