https://www.db-cyfastener.com/copper-brass-din7991-csk-flat-head-hex-socket-bolts-product/
Copper Brass DIN7991 CSK Flat Head Hex Socket Bolts
Product Photos and Information Name CSK Head hex socket bolts Standards DIN ISO ANC BSW JIS etc. Size M3-M50 Length 15-500 Materials Carbon Steel/Stainless...
flat headcopperbrasscskhex
https://www.bikeparts.com/BPC216415/better-bolts-titanium-sensor-rotor-bolt-kit-copper-12-count
Better Bolts Titanium Sensor Rotor Bolt Kit, Copper, 12/Count | Bikeparts.Com
Better Bolts Disc Rotor/Specialized Sensor Bolts - 6AL-4V grade 5 aerospace titanium disc brake rotor bolts for Specialized E-bikes with rotor mount sensor -
bolt kit