Top Cap Headset Titanium Bolt - Capped Head - M6x35mm – Better Bolts
Chris King NoThreadSet Headset Cap Bolt - AVT.Bike
Amazon.com : ProRuck M6x35mm Headset Stem Top Cap Titanium Bolts MTB Tapered Head Ti Screws for Fixing Stem Top Cap 2pcs (Multi-Color) : Sports & Outdoors
Phil Wood Headset Replacement Bolt – Phil Wood and Company