... aluminium washer,O-ring,Twin rings,heat shield Twin rings were developed for use with banjo bolts and rings 1.Washer Type ... : Copper washer,aluminium washer,O-ring,Twin rings,heat shield Twinrings were ... 15 Mo3 (16Mo3), 13CrMo44, Stainless Steel (1.4301,1.4571, 1.4541, 1.4310, 1.4016, 1.4401, 1.4539, 1.4828, 1.4876), Brass,Nickel, Monel, Hastelloy, Inconel ...