McMaster-Carr logo
    Filter by
    System of Measurement
    Thread Size
    Industrial Info Compare
    Hub Height
    Attribute Image
    Hub Diameter
    Attribute Image
    Hole Diameter
    Stud Length
    Attribute Image
    Hole Shape
    Thread Direction
    Color
    Insert Material
    Thread Depth
    Attribute Image
    Stud Material
    Hole Depth
    Maximum Temperature
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    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)
    19 Products

    Threaded-Hole Knobs

    Image of Product. Style 30. Front orientation. Eight-Arm Grip. Threaded-Hole Knobs, Style 30.
    Image of Product. Style 31. Front orientation. Eight-Arm Grip. Threaded-Hole Knobs, Style 31.

    Style 30

    Style 31

    Install these knobs on a threaded stud. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.
    Style 30—Eight-Arm Grip
    Image of Product. Style 30. Front orientation. Eight-Arm Grip. Threaded-Hole Knobs, Style 30.

    Style 30

    Phenolic—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Phenolic has good scratch resistance.
    Thread
    Head
    Hub
    Each
    Sz.
    Dp.
    Dia.
    Ht.
    Dia.
    Ht.
    Insert
    Material
    Temp. Range,
    ° F
    1-9
    10-Up
    Black Phenolic
    3/8"-16
    		1/2"2 3/8"3/8"1 3/4"7/16"Brass-10 to 2756479K190000000000
     
    Style 31—Eight-Arm Grip
    Image of Product. Style 31. Front orientation. Eight-Arm Grip. Threaded-Hole Knobs, Style 31.

    Style 31

    Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Thread
    Head
    Hub
    Each
    Sz.
    Dp.
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Aluminum
    1/2"-13
    		1 1/4"3 1/2"3/4"1 1/4"1"61515K242000000000000
     

    Threaded-Stud Knobs

    Image of Product. Front orientation. Eight-Arm Grip. Threaded-Stud Knobs, Style 20.

    Style 20

    Mount these knobs into a threaded hole. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.
    Style 20—Eight-Arm Grip
    Image of Product. Front orientation. Eight-Arm Grip. Threaded-Stud Knobs, Style 20.
    Phenolic—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Phenolic has good scratch resistance.
    Head
    Hub
    Each
    Thread
    Size
    Stud
    Lg.
    Dia.
    Ht.
    Dia.
    Ht.
    Stud
    Material
    Temp. Range,
    ° F
    1-9
    10-99
    100-Up
    Black Phenolic
    3/8"-16
    		3/4"2 3/8"3/8"1 3/4"7/16"Steel-30 to 4006479K23000000000000000
     

    Unthreaded-Hole Knobs

    Image of Product. Style 13. Front orientation. Style 13. Unthreaded-Hole Knobs, Eight-Arm Grip.

    Style 13

    Tap custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery.
    Style 13—Eight-Arm Grip
    Image of Product. Style 13. Front orientation. Style 13. Unthreaded-Hole Knobs, Eight-Arm Grip.

    Style 13

    Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Hole
    Head
    Hub
    Each
    Dia.
    Dp.
    Dia.
    Ht.
    Dia.
    Ht.
    1-9
    10-Up
    Aluminum
    1/2"1 1/4"3 1/2"3/4"1 1/4"1"61515K241000000000000
     

    Machinable-Hub Knobs

    Image of Product. Style 8. Front orientation. Style 8. Machinable-Hub Knobs, Eight-Arm Grip.

    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 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"61515K140000000000
     

    Square-Through-Hole Valve Knobs

    Image of Product. Front orientation. Valve Handles and Knobs. Square-Through-Hole Valve Knobs, Aluminum.

    Aluminum

    Image of Product. Front orientation. Valve Handles and Knobs. Square-Through-Hole Valve Knobs, Zinc.

    Zinc

    Primarily used on spigot valves, slide these knobs over valves with a square stem and secure them in place with your fastener.
    Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
    Zinc—Zinc alloy knobs have good corrosion resistance.
    Head
    Hole
    Dia.
    Ht.
    Wd.
    Dp.
    Each
    Eight-Arm Grip
     
    Aluminum
    2 1/2"1/2"1/4"3/8"63155K3100000
    2 1/2"1/2"9/32"3/8"63155K4110000
    2 1/2"1/2"3/8"3/8"63155K4120000
    2 3/4"1/2"9/32"3/8"63155K320000
    2 3/4"1/2"3/8"3/8"63155K330000
    3 1/2"9/16"7/16"7/16"63155K340000
    3 1/2"9/16"1/2"7/16"63155K350000
     
    Zinc
    2 1/2"1/2"1/4"3/8"6055K410000
    2 1/2"1/2"9/32"3/8"6055K420000
    2 1/2"1/2"3/8"3/8"6055K430000
    2 3/4"1/2"9/32"3/8"6055K5110000
    2 3/4"1/2"3/8"3/8"6055K5120000
    3 1/2"9/16"7/16"7/16"6055K440000
    3 1/2"9/16"1/2"7/16"6055K450000
     
    back to top