Specialty

SPC4™ Load Indicating Bolts

SPC4™ load indicating fastener technology allows users to monitor the clamp load of any SPC4™ bolted joint whether static or dynamic, by attaching an indicator datum disc located on the end of the fastener and reading the value with a user-friendly mechanical indicator that indicates the fastener’s loading (which relates to ultimate yield strength). Minimal modifications to the bolt assures basic bolt design integrity. This technology means the fastener can be loaded many times as long as the stress remains in the elastic range, meeting the criteria of ASTM F2482. An accurate assessment of loading can also be obtained after the joint has been put into service.