Shakti Springs Inc. Offers Spiral Pins for Joining Two or More Parts. Shakti Springs Inc. Is an ISO 9001 accredited organisation. The Spiral Pins for Joining Two or More Parts are mostly used in Auto Industry, Electrical Industries, Electronics, Chemical Industries, Railways, etc. The Spiral Pins are used for joining [Pinning] two or more parts. Apart from their role as fasteners, they may also be employed as hinges pivots, locating devices, retainers and so on. The spiral shaped cross section [appr.2 ¬ turns] Confer high elastic deformability on the spiral pin. The heavy duty pin is recommended where shear, shock and vibration loads are severe and where the static shear load is greater than the shock and vibration loads.