When fasteners lose their tension, the integrity of a bolted joint is in danger. The SPC4 load indicating fastener allows users to constantly monitor the clamp load on a bolted joint, whether static or dynamic. Attaching a probe to the datum disc on the head of the fastener gives a read-out on a hand-held digital monitor.
The SPC4 is manufactured by Valley Forge & Bolt Manufacturing Company, based in Arizona, USA, which also produces the Maxbolt and Betabolt load indicating fasteners that continually display the amount of tension in a bolt or stud.
