NTN SNR: MB8 Lock Washer 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: 3413520530204 EAN: 3413520530204 MB8 Lock Washer 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: 40mm MFR Part No.: MB8 Outside Diameter: 62mm Thickness: 1.25mm