Marsden Type Locknut
All metal free running self-locking nut.
Positive locking feature with no damage to mating threads
American standard and Metric: Hex Finished Nuts
Steel Grade 8, Alloys and Stainless Steel
UNC, UNF or 8UN Series, Class 2B, 3B, Left Hand Thread and Metric
Plain, Zinc, Cadmium, and other platings and coatings