Comparison : Item # HTLN-03, 0.664-32 Face Lock Style, Heavy Duty Inch Bearing Locknut
Item # HTLN-04, 0.781-32 Face Lock Style, Heavy Duty Inch Bearing Locknut
Item # HTLN-05, 0.969-32 Face Lock Style, Heavy Duty Inch Bearing Locknut
Item # HTLN-06, 1.173-18 Face Lock Style, Heavy Duty Inch Bearing Locknut
Item # HTLN-065, 1.312-18 Face Lock Style, Heavy Duty Inch Bearing Locknut