NTN SNR: MB12 Lock Washe Tab washers are used for securing KM series lock nuts. They have an inner tab for location on the adaptor sleeve. One of the external tabs is bent over a slot when used wit the KM series lock nuts. MPN: MB12 EAN: 3413520529932 MB12 Lock Washe Attributes: For Use With: Tab Washers are Used for Securing KM Series Lock Nuts. They Have An Inner Tab for Location on the Adaptor Sleeve. One of the External Tabs is Bent Over a Slot When Used with the KM Inside Diameter: 60mm MFR Part No.: MB12 Outside Diameter: 86mm Thickness: 1.5mm