Comparison : Item # HTLNKM-00-PH, M10 x .75 mm Peripheral Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM-01-PH, M12 x 1 mm Peripheral Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM-02-PH, M15 x 1 mm Peripheral Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM-03-PH, M17 x 1 mm Peripheral Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM-04-PH, M20 x 1 mm Peripheral Lock Style, Heavy Duty Metric Bearing Locknut