Set of 15 M8 x1.25 copper pinch nut for use on many exhaust manifolds and turbochargers. These nuts are "pinched" for locking purposes.
CRP, or Continental-Rein-Pentosin, has both an OEM arm and an OE-quality replacement parts division. Their catalog includes over 10,000 products, and they are the corporate entity that includes Rein, Pentosin, and Continental.