McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    5 Products

    Bearing Locknuts

    Image of System. Front orientation. Contains Annotated. Bearing Nuts. Bearing Locknuts.
    Image of Product. Carbon Steel. Front orientation. Bearing Nuts. Bearing Locknuts, Chamfered Face, Carbon Steel.

    Carbon Steel

    With a nylon insert that grips your threaded shaft or spindle without damaging its threads, these locknuts—also called shaft nuts—hold bearings, bushings, gears, and pulleys prone to vibration tightly in place. They come as one piece, so you can easily clamp them onto your shaft or spindle. But, since they aren’t made entirely of metal, they don’t stand up to heat as well as all-metal locknuts. Slots in their sides mean you can tighten and loosen them with a spanner wrench or spanner socket. Their face is also chamfered to help keep the size and weight of your assembly at a minimum. All meet international standards for bearing locknut dimensions.
    Zinc-Plated Carbon Steel—Zinc-plated carbon steel locknuts resist rusting from some moisture, but you shouldn’t use them with salt water or chemicals. They are strong and resist wear, though they don’t stand up to corrosion as well as 303 stainless steel locknuts.
    Thread Spacing—When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.
    Thread
    Zinc-Plated
    Carbon Steel
    Size
    Spacing
    OD,
    mm
    Wd.,
    mm
    Insert Max.
    Temp., ° F
    Each
    Chamfered Face
    M18 × 1 mmExtra Fine
    		288.52103552N24000000
    M18 × 1.5 mmFine
    		2810.52103552N2500000
     

    Bearing Nuts

    Image of Product. Front orientation. Bearing Nuts. Bearing Nuts, Carbon Steel, Stepped Face.

    Carbon Steel

    Stepped Face

    Often paired with spring lock washers to strengthen their hold, these bearing nuts—also known as shaft nuts—keep vibration from shifting bearings, bushings, pulleys, and gears on your threaded shaft or spindle. They have slotted sides, so you can tighten and loosen them with a spanner wrench or spanner socket.
    Carbon Steel—Carbon steel bearing nuts are strong and resist wear.
    Stepped Face—Use stepped-face bearing nuts with DIN 462 spring lock washers. You can also use them in pairs or with other bearing nuts. For the nut closer to the bearing, position the stepped face towards the bearing. All meet DIN standards for bearing lockout dimensions.
    Thread Spacing—When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.
    Nuts
    Bearing
    Lock Washers
    Thread
    Size
    Spacing
    OD,
    mm
    Wd.,
    mm
    Specs.
    Met
    For Lock Washer
    Specs. Met
    Each
    Each
    Carbon Steel
     
    Stepped Face
    M18 × 1.5 mmFine
    		348DIN 1804DIN 4623564N1500000090407A11700000
     

    Thin-Profile Bearing Nuts

    Image of System. Front orientation. Contains Annotated. Bearing Nuts. Thin-Profile Bearing Nuts.
    Image of Product. Front orientation. Bearing Nuts. Thin-Profile Bearing Nuts.
    Used in pairs or with another bearing nut, these thin-profile nuts—often called shaft nuts—hold bearings, bushings, pulleys, and gears in place on your threaded shaft or spindle. Threading two nuts tightly against each other makes it harder for vibration to loosen your assembly than if you used only one nut. For the nut closer to the bearing, position the stepped face towards the bearing. These thin-profile nuts have holes on the side, so you can tighten and loosen them with a pin spanner wrench. All meet DIN 1816, an international standard for bearing locknut dimensions.
    Carbon Steel—Carbon steel bearing nuts are strong and resist wear.
    Thread Spacing—When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.
    Thread
    Size
    Spacing
    OD,
    mm
    Wd.,
    mm
    Specs.
    Met
    Each
    Carbon Steel
     
    Stepped Face
    M18 × 1.5 mmFine
    		348DIN 18163549N15000000
     
    back to top