McMaster-Carr logo
    Filter by
    System of Measurement
    Handle Style
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Number of Arms
    Color
    Handle Material
    Knob Material
    Grip Material
    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)
    89 Products

    Machinable-Hub Knobs

    Image of Product. Style 1. Front orientation. Style 1. Machinable-Hub Knobs, Knurled-Head Grip.
    Image of Product. Style 2. Front orientation. Style 2. Machinable-Hub Knobs, Ribbed Grip.
    Image of Product. Style 3. Front orientation. Four-Arm Grip. Machinable-Hub Knobs, Style 3.
    Image of Product. Style 4. Front orientation. Four-Arm Grip. Machinable-Hub Knobs, Style 4.

    Style 1

    Style 2

    Style 3

    Style 4

    Image of Product. Style 5. Front orientation. Four-Arm Grip. Machinable-Hub Knobs, Style 5.
    Image of Product. Style 6. Front orientation. Five-Arm Grip. Machinable-Hub Knobs, Style 6.
    Image of Product. Style 7. Front orientation. Style 7. Machinable-Hub Knobs, Six-Arm Grip.
    Image of Product. Style 8. Front orientation. Style 8. Machinable-Hub Knobs, Eight-Arm Grip.

    Style 5

    Style 6

    Style 7

    Style 8

    Mill specific holes or keyways in the hub to meet your specifications, or weld in place. These knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.
    Style 1—Knurled-Head Grip
    Image of Product. Style 1. Front orientation. Style 1. Machinable-Hub Knobs, Knurled-Head Grip.

    Style 1

    Black-Oxide 1215 Carbon Steel—Steel knobs are stronger than iron. They have a black-oxide finish for mild rust resistance.
    303 Stainless Steel—303 stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.
    Brass—Brass knobs have good corrosion resistance and are nonmagnetic.
    6061 Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Black-Oxide 1215 Carbon Steel
    3/4"1/4"1/2"3/8"00000000000000000
    1"1/4"5/8"1/2"000000000000000
    1 1/2"5/16"3/4"11/16"000000000000000
    2"3/8"1"3/4"000000000000000
    2 1/2"9/16"1 1/2"15/16"0000000000000000
    3"5/8"1 3/4"1 1/8"00000000000000000
     
    303 Stainless Steel
    3/4"1/4"1/2"3/8"0000000000000000
    1"1/4"5/8"1/2"0000000000000000
    1"3/8"1/2"7/16"00000000000000000
    1 1/2"5/16"3/4"11/16"000000000000000000
    2"3/8"1"3/4"000000000000000000
    2"9/16"13/16"9/16"00000000000000000
    2 1/2"9/16"1 1/2"15/16"000000000000000000
    3"5/8"1 3/4"1 1/8"000000000000000000
    3"11/16"1 1/4"9/16"00000000000000000
     
    Brass
    3/4"1/4"1/2"3/8"000000000000000
    1"1/4"5/8"1/2"000000000000000
    1 1/2"5/16"3/4"11/16"00000000000000000
    2"3/8"1"3/4"00000000000000000
     
    6061 Aluminum
    1"3/8"1/2"7/16"000000000000000
    2"9/16"13/16"9/16"00000000000000000
    3"11/16"1 1/4"9/16"00000000000000000
     
    Style 2—Ribbed Grip
    Image of Product. Style 2. Front orientation. Style 2. Machinable-Hub Knobs, Ribbed Grip.

    Style 2

    Phenolic—Phenolic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents.
    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    Temp. Range,
    ° F
    1-9
    10-Up
    Black Phenolic
    1 1/4"3/8"5/8"3/8"-30 to 40000000000000000000
    1 3/4"3/8"3/4"3/8"-30 to 400000000000000000
     
    Style 3—Four-Arm Grip
    Image of Product. Style 3. Front orientation. Four-Arm Grip. Machinable-Hub Knobs, Style 3.

    Style 3

    Brass—Brass knobs have good corrosion resistance and are nonmagnetic.
    6061 Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Brass
    1"3/8"1/2"1/2"00000000000000000
    1 1/2"1/2"5/8"3/8"00000000000000000
    2"1/2"13/16"1/2"00000000000000000
     
    6061 Aluminum
    1"3/8"1/2"1/2"0000000000000000
    1 1/2"1/2"5/8"3/8"0000000000000000
    2"1/2"13/16"1/2"0000000000000000
    2 1/2"9/16"1"9/16"0000000000000000
    3"5/8"1 1/4"5/8"000000000000000000
     
    Style 4—Four-Arm Grip
    Image of Product. Style 4. Front orientation. Four-Arm Grip. Machinable-Hub Knobs, Style 4.

    Style 4

    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Iron
    1 1/8"5/16"9/16"3/8"00000000000000000
    1 1/2"7/16"5/8"9/16"000000000000000
    2"7/16"3/4"9/16"000000000000000
    2 1/2"1/2"1"1 3/4"00000000000000000
    2 9/16"1/2"1 1/8"1"000000000000000
     
    Style 5—Four-Arm Grip
    Image of Product. Style 5. Front orientation. Four-Arm Grip. Machinable-Hub Knobs, Style 5.

    Style 5

    319 Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    319 Aluminum
    1 1/4"5/16"9/16"9/16"00000000000000000
    1 1/2"3/8"11/16"11/16"000000000000000
    2 1/8"1/2"7/8"15/16"000000000000000
    3"11/16"1 3/8"1 1/4"000000000000000
     
    Style 6—Five-Arm Grip
    Image of Product. Style 6. Front orientation. Five-Arm Grip. Machinable-Hub Knobs, Style 6.

    Style 6

    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Iron
    3"1/2"1 1/4"1 1/4"0000000000000000000
    3 1/4"1/2"1 1/2"1 1/4"00000000000000000
     
    Style 7—Six-Arm Grip
    Image of Product. Style 7. Front orientation. Style 7. Machinable-Hub Knobs, Six-Arm Grip.

    Style 7

    319 Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Iron
    1 1/2"1/2"7/8"1 1/2"00000000000000000
    2"1/2"7/8"1/2"000000000000000
    2"1/2"7/8"1 1/2"0000000000000000
    2 3/4"1/2"1 1/4"3/4"00000000000000000
    2 3/4"1/2"1 1/4"1 1/2"00000000000000000
    3 1/2"5/8"1 5/8"7/8"00000000000000000
     
    319 Aluminum
    1 1/2"1/2"3/4"7/8"0000000000000000
    2"3/4"1"7/8"0000000000000000
     
    Style 8—Eight-Arm Grip
    Image of Product. Style 8. Front orientation. Style 8. Machinable-Hub Knobs, Eight-Arm Grip.

    Style 8

    319 Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    319 Aluminum
    3 1/2"3/4"1 1/4"1 1/8"000000000000000000
     

    Palm-Grip Machinable-Hub Knobs

    Image of Product. Front orientation. Knobs. Palm-Grip Machinable-Hub Knobs.
    The domed top allows you to firmly hold these knobs in the palm of your hand. Mill specific holes or keyways in the hub to meet your specifications, or weld in place. Use these knobs to position, tighten, and hold fixtures, equipment, and machinery. Made of aluminum, all have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Knurled-Head Grip
    Head
    Hub
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    6061 Aluminum
    1"1/2"5/8"7/16"0000000000000000000
    2"11/16"1"1/2"00000000000000000
    2 1/4"3/4"1 1/4"5/8"00000000000000000
     

    Machine Handles

    These handles are often used for operating machinery.
    Machinable-Hub Mount
    Image of Product. Front orientation. Machine Handles. Machinable-Hub Mount, 2 Arms.
    Image of Product. Front orientation. Machine Handles. Machinable-Hub Mount, 3 Arms.

    2 Arms

    3 Arms

    Image of Attribute. Front orientation. Contains Annotated. Machinable-Hub Mount, 2 Arms.
    Image of Attribute. Front orientation. Contains Annotated. Machinable-Hub Mount, 3 Arms.

    2 Arms

    3 Arms

    Machinable-hub handles permit milling specific holes or keyways in the hub to meet your specifications. They can also be welded in place.
    Steel—Steel handles are stronger than iron handles.
    Black Oxide 12L14 Carbon Steel—Steel handles with a black-oxide finish have mild rust resistance. Steel handles are stronger than iron handles.
    Zinc-Plated Iron—Iron handles are zinc plated for corrosion resistance.
    319 Aluminum—Aluminum handles have mild corrosion resistance, are lightweight, and are nonmagnetic.
    5/16" Dia. Starter Hole—A starter hole in the hub acts as a guide for drilling a larger hole.
    Knob
    No. of
    Arms
    Hub
    Dia.
    Handle
    Lg.
    Projection
    Hub
    Projection
    Diameter
    Material
    Color
    Temp. Range,
    ° F
    Features
    Each
    Steel
    31 1/2"2 3/4"1 3/4"1 9/16"—Fiberglass-Reinforced NylonBlack15 to 2455/16" Dia. Starter Hole0000000000000
    31 1/2"3 9/16"2 1/8"1 11/16"—Fiberglass-Reinforced NylonBlack15 to 2455/16" Dia. Starter Hole000000000000
    31 1/2"4 5/16"2 5/16"1 13/16"—Fiberglass-Reinforced NylonBlack15 to 2455/16" Dia. Starter Hole000000000000
     
    Black Oxide 12L14 Carbon Steel
    27/8"4 3/4"2 3/8"1 1/2"3/4"Nylon
    		Black-50 to 250—000000000000
    21 1/8"7"3 1/4"1 3/4"1"Nylon
    		Black-50 to 250—000000000000
    21 3/8"9 3/8"2 3/8"2 1/4"1 3/8"Nylon
    		Black-50 to 250—000000000000
    21 3/8"9 3/8"4 1/2"2 1/4"1 3/8"Nylon
    		Black-50 to 250—000000000000
     
    Zinc-Plated Iron
    21 1/8"4 3/4"2 1/4"1 3/8"3/4"Iron———000000000000
    21 3/8"6"2 1/2"1 5/8"7/8"Iron———000000000000
    21 5/8"8"2 15/16"1 3/4"1"Iron———000000000000
     
    319 Aluminum
    21 1/8"4 1/2"1 7/8"1"11/16"Aluminum
    		———000000000000
    21 1/2"6"2 5/8"1 1/2"15/16"Aluminum
    		———000000000000
     

    Machinable-Hub Knobs with Handle

    Image of Product. Front orientation. Knobs. Machinable-Hub Knobs with Handle.
    A handle makes these knobs easy to turn. Mill specific holes or keyways in the hub to meet your specifications, or weld in place. These knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.
    Knurled-Head Grip
    303 Stainless Steel—303 stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.
    6061 Aluminum—6061 aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Head
    Hub
    Handle
    Each
    Dia.
    Ht.
    Dia.
    Ht.
    Lg.
    Material
    1-9
    10-Up
    303 Stainless Steel
    2"9/16"13/16"9/16"1 9/32"Chrome-Plated Brass0000000000000000000
    3"9/16"1 1/4"11/16"1 1/2"Chrome-Plated Brass00000000000000000
     
    6061 Aluminum
    2"9/16"13/16"9/16"1 1/4"Chrome-Plated Brass00000000000000000
    3"11/16"1 1/4"9/16"1 1/2"Chrome-Plated Brass00000000000000000
     

    Balanced Machinable-Hub-Mount Crank Handles

    Image of Product. Front orientation. Contains Annotated. Crank Handles. Balanced Machinable-Hub-Mount Crank Handles.
    Balanced weight distribution prevents unintentional handle movement, even in high-vibration applications. Mill specific holes or keyways in the hub to meet your specifications or weld in place. Often used on cross-slide tables, these crank handles provide leverage to maximize force for turning and tightening.
    Stationary Grip—Handles with a stationary grip are best when you need to apply high force because the grip won’t rotate or slip.
    Revolving Grip—Handles with a revolving grip let you turn continuously without having to adjust your grasp while also reducing strain on your arm.
    Set Screw Starting Hole—Handles with a set screw starting hole have a starting hole in the hub that acts as a guide for drilling a larger hole.
    Hub
    Grip
    Handle
    Lg.
    Projection
    Dia.
    Projection
    Ht.
    Material
    Features
    Each
    Stationary Grip
     
    12L14 Carbon Steel
    1 1/2"2 9/32"7/8"7/8"2 1/8"Steel1/4" Diameter  ​Set Screw Starting Hole00000000000000
    1 3/4"2 21/32"1"1"2 15/32"Steel1/4" Diameter  ​Set Screw Starting Hole0000000000000
    3"4 1/16"1 3/8"1 3/8"3 3/4"Steel1/4" Diameter  ​Set Screw Starting Hole0000000000000
     
    Revolving Grip
     
    12L14 Carbon Steel
    1 23/32"2 15/16"1"1"2 23/32"Steel1/4" Diameter  ​Set Screw Starting Hole0000000000000
    2 29/32"4 9/32"1 3/8"1 3/8"3 31/32"Steel1/4" Diameter  ​Set Screw Starting Hole0000000000000
     

    Machinable-Hub-Mount Crank Handles

    Image of Product. Front orientation. Contains Annotated. Crank Handles. Machinable-Hub-Mount Crank Handles.
    Mill specific holes or keyways in the hub to meet your specifications or weld in place. Often used on cross-slide tables, these crank handles provide leverage to maximize force for turning and tightening.
    Stationary Grip—Handles with a stationary grip are best when you need to apply high force because the grip won’t rotate or slip.
    Hub
    Grip
    Handle
    Lg.
    Projection
    Dia.
    Projection
    Ht.
    Material
    Each
    Stationary Grip
     
    1018 Low-Carbon Steel
    2 5/8"3 5/8"1"1 1/4"2 7/32"Steel0000000000000
    4"4 5/16"1 1/16"1 5/16"2 1/2"Steel000000000000
    4 1/2"4 1/2"1 1/4"1 3/8"2 11/16"Steel000000000000
    5 1/2"4 15/16"1 1/4"1 13/16"2 7/8"Steel000000000000
    6 1/2"5 1/8"1 1/4"1 15/16"2 15/16"Steel000000000000
    8"5 7/16"1 3/8"2 1/16"2 7/8"Steel0000000000000
    9"6 1/16"1 9/16"2 7/16"3 3/16"Steel0000000000000
    11"7"1 3/4"3"3 1/2"Steel0000000000000
     

    Heavy Duty Adjustable Handles

    Image of Product. Front orientation. Adjustable Handles. Heavy Duty Adjustable Handles, Machinable Hub.

    Machinable Hub

    These rugged steel handles provide lasting durability for applications involving frequent positioning, tightening, and holding adjustments. Lift the handle to rotate freely; then release the handle to engage and tighten. These handles are also known as clamping handles. All have a black-oxide finish for mild rust resistance.
    Machinable Hub
    Image of Product. Front orientation. Adjustable Handles. Heavy Duty Adjustable Handles, Machinable Hub.
    Image of Attribute. Front orientation. Contains Annotated. Adjustable Handles. Heavy Duty Adjustable Handles, Machinable Hub.
    Machinable-hub handles permit milling specific holes or keyways in the hub to meet your specifications. They can also be welded in place.
    Knob
    Hub
    Dia.
    Handle
    Lg.
    Projection
    Hub
    Projection
    Dia.
    Material
    Color
    Temp. Range,
    ° F
    Each
    Black-Oxide 12L14 Carbon Steel
    7/8"2"2"1 1/2"3/4"Nylon
    		Black-50 to 2500000000000000
    1 1/8"3"3"1 3/4"1"Nylon
    		Black-50 to 250000000000000
    1 3/8"4"3 7/8"2 1/4"1 3/8"Nylon
    		Black-50 to 250000000000000
     

    Machinable-Hub Bar Knobs

    Image of ProductInUse. Front orientation. Contains Annotated. Knobs. Machinable-Hub Bar Knobs.
    Mill specific holes or keyways in the hub to meet your specifications, or weld in place. Insert a bar between the arms and twist. The bar provides maximum leverage to tighten knobs securely. Made of iron, these knobs have a zinc-plated finish for corrosion resistance.
    Four-Arm Grip
    Head
    Hub
    Each
    For Max.
    Bar Dia.
    Wd.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Zinc-Plated Iron
    7/16"2"1 1/4"1 1/4"7/8"000000000000000000
    11/16"2 1/2"1 7/16"1 1/2"15/16"0000000000000000
     
    back to top