Comparison : Item # BB-12686, Internal Tooth Lockwasher, Zinc Cr+3 (Inch)
Item # BB-12687, Internal Tooth Lockwasher, Zinc Cr+3 (Inch)
Item # BB-12688, Internal Tooth Lockwasher, Zinc Cr+3 (Inch)
Item # BB-12689, Internal Tooth Lockwasher, Zinc Cr+3 (Inch)
Item # BB-12690, Internal Tooth Lockwasher, Zinc Cr+3 (Inch)