Comparison : Item # BB-43640, 45H DIN 916, Zinc Bake Cr+3, Alloy (Metric)
Item # BB-43641, 45H DIN 916, Zinc Bake Cr+3, Alloy (Metric)
Item # BB-43642, 45H DIN 916, Zinc Bake Cr+3, Alloy (Metric)
Item # BB-43643, 45H DIN 916, Zinc Bake Cr+3, Alloy (Metric)
Item # BB-43644, 45H DIN 916, Zinc Bake Cr+3, Alloy (Metric)