Genuine Yamaha 10mm x 1.25 pitch double banjo bolt used on many Yamaha motorcycles with twin front disc brakes. This is exactly the right size for these applications, where sometimes pattern parts are clearly not correct. This is OEM removed from an original Yamaha XS1100 motorcycle. Good condition, no rust, but marked from use as you can see. length under head is 30mm and length from under head to first hole centre is 5mm, second hole centre 13mm. Hexagon is 12mm across the flats. Substituted by 90401 10038. UK seller.