Comparison : Item # HTLNKM-03, M17 x 1 mm Face Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM-04, M20 x 1 mm Face Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM -05-1, M25 x 1 mm Face Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM-05, M25 x 1.5 mm Face Lock Style, Heavy Duty Metric Bearing Locknut
Item # HTLNKM-06, M30 x 1.5 mm Face Lock Style, Heavy Duty Metric Bearing Locknut