Stainless steel fine hex bolt M10X120 (pitch 1.25) L size is displayed below the neck. This is a SUS 304 hex bolt of M10P=1.25 (fine pitch) commonly used in cars and motorcycles. Please use for adjusting the installation of seat rails, and other parts. The fine pitch is structurally thicker than the coarse pitch, which increases the strength of the valley. This product is M10P = 1.25 fine pitch. Cannot be used in conjunction with coarse (P=1.5). Please prepare nuts with the same pitch.