Domed Titanium Flush Head M8 - 1.25 X 28mm. Accepts a 6mm hex key. Grip Length = 13mm. Thread Length = 15mm. The heads are slighlty dome for better hex wrench engagement. These are used for REAR SPROCKET AND SUB FRAME BOLTS. The heads have been forged and the threads have been rolled for better fatigue resistance. Made from Aircraft grade material that has a Minimum UTS of 160KSI.