Bicycle chain stay bolt, model SC-FC-111, a short hex-head bolt for the chain stay of a bicycle frame. It has a 1/4” x 26 TPI thread, comes in lengths of 7.5 MM - 12 MM, and is offered in Black, BCP or ZP finish. The hex head is stamped "SONA", and a hex nut sits on the short threaded shank. The bolts shown carry a dark finish.