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)
    8 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.
    Carbon Steel—All carbon steel locknuts are strong and resist wear, though they don’t stand up to corrosion as well as 303 stainless steel locknuts.
    303 Stainless Steel—303 stainless steel locknuts resist corrosion better than carbon steel locknuts but aren’t as strong. They withstand washdowns and chemicals.
    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.
    Locknuts
    Sockets
    Thread
    Carbon Steel
    303
    Stainless Steel
    Size
    Spacing
    OD
    Wd.
    Insert Max.
    Temp., ° F
    Specs. Met
    Each
    Each
    Each
    Chamfered Face
    1.563"-18
    		Extra Fine
    		2 1/4"1/2"160ANSI/ABMA 8.200000000000000000000000000000000000000000
     

    Bearing Nuts

    Image of Product. Front orientation. Bearing Nuts. Bearing Nuts, Carbon Steel, Chamfered Face.
    Image of Product. Front orientation. Bearing Nuts. Bearing Nuts, 303 Stainless Steel, Chamfered Face.

    Carbon Steel

    Chamfered Face

    303 Stainless

    Steel,

    Chamfered 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.
    303 Stainless Steel—303 stainless steel bearing nuts resist corrosion better than carbon steel. They also withstand washdowns and chemicals.
    Chamfered Face—Chamfered-face bearing nuts weigh less and produce less heat than stepped-face nuts.
    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
    Sockets
    Thread
    Size
    Spacing
    OD
    Wd.
    Specs. Met
    For Lock Washer
    Specs. Met
    Each
    Each
    Each
    Carbon Steel
     
    Chamfered Face
    1.563"-18
    		Extra Fine
    		2 1/4"7/16"ANSI/ABMA 8.2ANSI/ABMA 8.2000000000000000000000000000000000000000000
     
    303 Stainless Steel
     
    Chamfered Face
    1.563"-18
    		Extra Fine
    		2 1/4"7/16"ANSI/ABMA 8.2ANSI/ABMA 8.20000000000000000000000000000000000000000
     

    Self-Stopping Ball Screws and Nuts

    Image of ProductInUse. Stop Pin Shown Installed. Front orientation. Contains Inset. Ball Screws and Nuts. Self-Stopping Ball Screws and Nuts.

    Stop Pin Shown Installed

    Keep your ball screw spinning without the ball nut damaging your system—a clutch-like collar inside the ball nut prevents it from travelling past the stop pins. Install the included stop pins anywhere along the length of the ball screw by drilling a hole in the valley of the threads (also known as the root) and pressing in the stop pin. When the collar meets the stop pin, the ball nut disengages from the threads and begins to idle. To start the ball nut travelling again, spin the ball screw in the opposite direction. All components are black-oxide steel and have mild corrosion resistance. To ensure compatibility, select components that have the same thread size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
    Externally Threaded Ball Nuts—Right-Hand Threaded
    Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Self-Stopping Ball Screws and Nuts, Ball Nuts, Externally Threaded Nut.
    Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
    Thread
    Size
    Lg.
    Dia.
    No. of Thread
    Starts
    Travel Distance
    per Turn
    External Thread
    Size
    Hardness
    Dynamic Thrust
    Load Cap., lb.
    Max.
    Backlash
    Temp. Range,
    ° F
    Each
    Black-Oxide Alloy Steel
    1"-4
    		2 23/32"1 5/8"20.274"1.563"-18
    		Rockwell C569000.008"-65 to 30000000000000000
     
    back to top