Materials:

Body and Fittings: Brass per QQ-B-626, Alloy 360, ½ Hard.
Center and Outer Contact: Gold plated Beryllium Copper per QQ-C-530 Cond. HT.
Insulator: Teflon
Finish:
Body and Fittings: Tarnish Resistant Plating
Center and Outer Contact: Gold plated Beryllium Copper
Marking: “POMONA 3580”

Ratings:

Operating Temperature: -65°C. (85°F.) to +165° C. (+329°F.)
Dielectric: PTFE