Style TRW Ring Lug Thermocouples are surface-mounted sensors that attach via an existing screw or bolt, with the thermocouple junction crimped to a ring lug. Available in stud sizes from No. 6 to 3/8, they use fiberglass insulation rated to 900°F (482°C) or Teflon® insulation rated to 400°F (204°C). Termination options include spade lugs, split leads, miniature and standard plugs and jacks, and BX connectors. The assembly complies with ANSI J, K, E, and T thermocouple standards.