Abstract: A portable grip length indicator for determining a discrete fastener length for a fastener to be used in fastening a stack of two or more pieces of material. The indicator comprises a body, a probe attached to the body and capable of extending beyond the body for determining the thickness of the stack, a transducer connected to the probe for sensing the relative movement of the probe and translating the movement into an electrical output signal, and an electrical processor for computing the discrete fastener length from the output signal of the transducer according to a predetermined correlation of the thickness of the stack and the type of fastener to be used.

Abstract: A riveting apparatus includes a body pivotable about a horizontal axis and having first and second arms extending therefrom. Riveting structure is provided on the arms for cooperating to install and fasten rivets through a workpiece positioned between the riveting structure. The body may be rotated between a substantially horizontal to a substantially vertical position to accommodate riveting a workpiece having varying contours. The apparatus allows riveting operations to be performed at any point on the workpiece while permitting the operator to position himself immediately adjacent the point of riveting to assure proper alignment of the workpiece and proper riveting thereof.