A strain gage assembly for use in a circular stapling device includes a housing having a base portion, an extension portion, and a flange disposed on a free end of the extension portion. A plurality of strain gages is disposed about the extension portion. An anchor supports the housing, and a support is received about the housing and in engagement with the anchor. The strain gages are configured to measure an axial load on the trocar assembly received within the longitudinal passage of the housing. The anchor includes a cylindrical portion having an end and a rim disposed about the end of the cylindrical portion. The anchor defines a cylindrical recess and an opening in communication with the cylindrical recess. The cylindrical recess receives the flange when the extension portion is received within the opening. The support includes a collar for supporting a reload assembly of the circular stapling device.