A block for a modular fluid block assembly is disclosed. The block includes first and second opposed faces and first and second apertures from the first face to the second face for receiving a fastener. Each aperture includes a first end and a second end and a head receiving cavity disposed adjacent the first end. The block further includes a fluidic passage passing from the first face to the second face and a pair of fastener receiver cavities in the first face. The block further includes a pair of head receiving cavities in the second face.