The #105 C mount adapter flange adapts specific #2 shutter housing types to user equipment fitted with a C mount thread (1.00in x 32TPI). This adapter can be attached to the #2 housing rear surface (via the 16.25in x 40TPI thread) or the front surface (via three #2-56 flat head screws). The LS and VS14/25 series, only, can be configured with this flange type.