TECHSPEC® C, S, and T-Mount Thread Adapters ensure that all Tube System thread types are compatible with one another. This includes C, S, and T-Mount threads, TECHSPEC Multi-Element Tube System threads (M29 x 0.75), ID1 (1.035” x 40 TPI, equivalent to SM1 thread specifications), and ID05 (0.535” x 40 TPI, equivalent to SM05 thread specifications). All thread adapters have a low-profile design to minimize extension length. They also have a black anodized aluminum construction to ensure minimal reflections within a system. TECHSPEC C, S, and T-Mount Thread Adapters are ideal for system expansion and work with any optical component that uses the supported thread types.