1978-2008 GM Disc Brake Caliper Banjo Bolts (10mmx1.5 thread) and Crush Washers 6pc. This is a 6 pc set that includes 2 bolts and 4 crush washers. 1978 was the first year for the metric 10mmx1.5 thread size for the single piston caliper and this is the bolt that held the brake hose to the caliper.
