The #106 female C mount adapter flange adapts specific #2 or #3 shutter housing types to user equipment fitted with a male C mount thread (1.00in x 32TPI). This adapter can be attached to the #2 housing rear surface (via the 1.625in x 40TPI thread) or the front surface (with the use of a #130 thread adapter). The LS and VS14/25 series can be configured with this flange type.