Circular Flange Mounting Assembly with Bolt Pattern Detail

This technical drawing depicts a circular flange mounting assembly with a precise bolt pattern configuration. The design features a center mounting hole surrounded by four evenly spaced bolt holes arranged in a circular pattern. The flange appears to incorporate concentric circles for proper seating and alignment, with a specific bolt circle diameter. The drawing includes perpendicular reference lines that establish the coordinate system and mounting orientation. A small keyway or alignment feature is visible at the top of the inner circle, likely for proper rotational positioning during installation. This type of flange connection is commonly used in mechanical systems requiring secure, precision mounting of cylindrical components such as motors, pumps, or drive shafts where torque transfer and accurate alignment are critical factors.