A stainless steel AN3 to M10x1.0 adapter in SUS303, supplied in the extended long-body form. It lets an AN3 braided brake or clutch line connect to an M10x1.0 metric port — the thread found on a great many callipers, master cylinders and proportioning blocks. The long body is the version to order when the port is set down in a recess or shrouded by a calliper casting, where a standard adapter leaves the hose fouling the surrounding metal or the spanner with nowhere to sit. SUS303 stainless is chosen here for its corrosion resistance and machinability, which matters on a wheel-arch component exposed to water and brake fluid. Check the port thread carefully before ordering, as M10x1.0, x1.25 and x1.5 are easily confused, and bleed the system fully after fitting.