These are custom grade 8 u bolts made using 4140 SAE grade 8 steel material with rolled 1/2-13 thread. The hardness was recorded at 36 HRC and tensile strength at 162 KSI. 5 pieces were made for our customer for testing purposes prior to a larger commitment. The inside width was set at 4.76", inside length at 8.5", and approximately 1.75" of rolled thread was incorporated on both legs. Material and heat treat certs were provided with the parts per our customer's request.
