Beryllium copper per ASTM B 196 and/or ASTM B 197. Gold plate per MIL-G-45204 over electrolytic nickel per QQ-N-290 or electroless per MIL-C-26074.
CRES 303 per ASTM A 484 and ASTM A 582 or ASTM A 555 and ASTM A 581. Passivate per MIL-F-14072 E300.
Brass per ASTM B 16. . Gold plate per MIL-G-45204 over electrolytic nickel per QQ-N-290 or electroless per MIL-C-26074.
Virgin PTFE fluorocarbon per ASTM D 1710 and ASTM D 1457.
Iron-nickel-cobalt sealing alloy (Kovar) per ASTM F 15-78. Gold plate per MIL-G-45204 over electrolytic nickel per QQ-N-290 or electroless per MIL-C-26074.
Corning 7070 glass.
Ultem 1000 (Polyetherimde) per ASTM D 5205.
Torlon (Polyamide-Imide) per ASTM D 5204.
17-7 Stainless Steel per ASTM A313-95A