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Clamping Knobs 4-Arm

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4-Arm Clamping Knobs provide a secure multilobed grip to position, tighten, and hold fixtures, equipment, and machinery. We offer a large selection of knob sizes, thread configurations and ergonomic grips to meet your design requirements. Our pronged knobs feature a plastic base design that provides excellent chemical resistance and a more economical choice opposed to all-steel versions.

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Product SKUs information
Item Code Price range Availability Stud Length Knob Diameter Insert Type Thread Size Insert Material Knob Material Buy
KN4C----4P7--21
$1.98 - $2.84 990 In stock
2.500 in
Thru-Hole
1/4-20
Steel
Polypropylene
KN4C03754S2--21
$1.71 - $2.44 1175 In stock
0.370 in
1.400 in
Stud
1/4-20
Steel
Polypropylene
KN6C10004P7--21
$2.70 - $3.86 784 In stock
1.000 in
2.500 in
Stud
3/8-16
Steel
Polypropylene
KN5C20004S2--21
$2.11 - $3.02 765 In stock
2.000 in
1.400 in
Stud
5/16-18
Steel
Polypropylene
KN6C12504P7--21
$2.76 - $3.95 858 In stock
1.250 in
2.500 in
Stud
3/8-16
Steel
Polypropylene
KN8C----4P7--21
$2.14 - $3.07 1000 In stock
2.500 in
Thru-Hole
1/2-13
Steel
Polypropylene
KN02----4S2BS21
$2.08 - $2.96 1275 In stock
1.400 in
Blind Hole
10-32
Steel
TPE (Overmold), Polypropylene (Base)
KN0205004S2-S21
$3.39 - $4.83 1068 In stock
0.500 in
1.400 in
Stud
10-32
Steel
TPE (Overmold), Polypropylene (Base)
KN4C----4S2BS21
$2.10 - $3.00 1250 In stock
1.400 in
Blind Hole
1/4-20
Steel
TPE (Overmold), Polypropylene (Base)
KN0207504S2-S21
$3.50 - $5.00 996 In stock
0.750 in
1.400 in
Stud
10-32
Steel
TPE (Overmold), Polypropylene (Base)
KN5C----4P4B-22
$1.42 - $2.02 1997 In stock
1.750 in
Blind Hole
5/16-18
Steel
Polypropylene
KN4C12504S2-S21
$3.76 - $5.38 1030 In stock
1.250 in
1.400 in
Stud
1/4-20
Steel
TPE (Overmold), Polypropylene (Base)
KN5C10004P4--21
$1.97 - $2.81 418 In stock
1.000 in
1.750 in
Stud
5/16-18
Steel
Polypropylene
KN0207504S4-S21
$4.22 - $6.03 1224 In stock
0.750 in
1.730 in
Stud
10-32
Steel
TPE (Overmold), Polypropylene (Base)
KN5C25004P4--21
$2.28 - $3.27 84 In stock
2.500 in
1.750 in
Stud
5/16-18
Steel
Polypropylene
KN8C----4P7B-21
$2.14 - $3.07 930 In stock
2.500 in
Blind Hole
1/2-13
Steel
Polypropylene
KN5C25004S4-S21
$5.09 - $7.29 1350 In stock
2.500 in
1.730 in
Stud
5/16-18
Steel
TPE (Overmold), Polypropylene (Base)
KN4C10004P7--21
$2.68 - $3.83 312 In stock
1.000 in
2.500 in
Stud
1/4-20
Steel
Polypropylene
KN4C15004S5-S21
$5.19 - $7.41 1360 In stock
1.500 in
2.000 in
Stud
1/4-20
Steel
TPE (Overmold), Polypropylene (Base)
KN5C05004P7--21
$2.59 - $3.71 1040 In stock
0.500 in
2.500 in
Stud
5/16-18
Steel
Polypropylene
  • of 4
4-Arm Knob - Knob Diameter 63.5 mm | 2.500 in; Thread Size 1/4-20; Knob Height 28.7 mm | 1.130 in

KN4C----4P7--21

Price Range
$2.84 - $1.98

Stock Levels
990 In stock
Attributes
  • Knob Diameter
    2.500 in
  • Knob Height
    1.130 in
  • Hub Diameter
    0.980 in
  • Hub Height
    0.480 in
  • Thread Size
    1/4-20
4-Arm Knob - Knob Diameter 35.6 mm | 1.400 in; Thread Size 1/4-20; Stud Length 9.4 mm | 0.370 in

KN4C03754S2--21

Price Range
$2.44 - $1.71

Stock Levels
1175 In stock
Attributes
  • Knob Diameter
    1.400 in
  • Knob Height
    0.640 in
  • Hub Diameter
    0.550 in
  • Hub Height
    0.180 in
  • Stud Length
    0.370 in
4-Arm Knob - Knob Diameter 63.5 mm | 2.500 in; Thread Size 3/8-16; Stud Length 25.4 mm | 1.000 in

KN6C10004P7--21

Price Range
$3.86 - $2.70

Stock Levels
784 In stock
Attributes
  • Knob Diameter
    2.500 in
  • Knob Height
    1.130 in
  • Hub Diameter
    0.980 in
  • Hub Height
    0.480 in
  • Stud Length
    1.000 in
4-Arm Knob - Knob Diameter 35.6 mm | 1.400 in; Thread Size 5/16-18; Stud Length 50.8 mm | 2.000 in

KN5C20004S2--21

Price Range
$3.02 - $2.11

Stock Levels
765 In stock
Attributes
  • Knob Diameter
    1.400 in
  • Knob Height
    0.640 in
  • Hub Diameter
    0.550 in
  • Hub Height
    0.180 in
  • Stud Length
    2.000 in
4-Arm Knob - Knob Diameter 63.5 mm | 2.500 in; Thread Size 3/8-16; Stud Length 31.8 mm | 1.250 in

KN6C12504P7--21

Price Range
$3.95 - $2.76

Stock Levels
858 In stock
Attributes
  • Knob Diameter
    2.500 in
  • Knob Height
    1.130 in
  • Hub Diameter
    0.980 in
  • Hub Height
    0.480 in
  • Stud Length
    1.250 in
4-Arm Knob - Knob Diameter 63.5 mm | 2.500 in; Thread Size 1/2-13; Knob Height 28.7 mm | 1.130 in

KN8C----4P7--21

Price Range
$3.07 - $2.14

Stock Levels
1000 In stock
Attributes
  • Knob Diameter
    2.500 in
  • Knob Height
    1.130 in
  • Hub Diameter
    0.980 in
  • Hub Height
    0.480 in
  • Thread Size
    1/2-13
4 Arm Knob - Knob Diameter 35.6 mm | 1.400 in; Thread Size 10-32; Knob Height 16.3 mm | 0.640 in

KN02----4S2BS21

Price Range
$2.96 - $2.08

Stock Levels
1275 In stock
Attributes
  • Knob Diameter
    1.400 in
  • Knob Height
    0.640 in
  • Hub Diameter
    0.550 in
  • Hub Height
    0.180 in
  • Thread Size
    10-32
4-Arm Knob - Knob Diameter 35.6 mm | 1.400 in; Thread Size 10-32; Stud Length 12.7 mm | 0.500 in

KN0205004S2-S21

Price Range
$4.83 - $3.39

Stock Levels
1068 In stock
Attributes
  • Knob Diameter
    1.400 in
  • Knob Height
    0.640 in
  • Hub Diameter
    0.550 in
  • Hub Height
    0.180 in
  • Stud Length
    0.500 in
4 Arm Knob - Knob Diameter 35.6 mm | 1.400 in; Thread Size 1/4-20; Knob Height 16.3 mm | 0.640 in

KN4C----4S2BS21

Price Range
$3.00 - $2.10

Stock Levels
1250 In stock
Attributes
  • Knob Diameter
    1.400 in
  • Knob Height
    0.640 in
  • Hub Diameter
    0.550 in
  • Hub Height
    0.180 in
  • Thread Size
    1/4-20
4-Arm Knob - Knob Diameter 35.6 mm | 1.400 in; Thread Size 10-32; Stud Length 19.1 mm | 0.750 in

KN0207504S2-S21

Price Range
$5.00 - $3.50

Stock Levels
996 In stock
Attributes
  • Knob Diameter
    1.400 in
  • Knob Height
    0.640 in
  • Hub Diameter
    0.550 in
  • Hub Height
    0.180 in
  • Stud Length
    0.750 in
4-Arm Knob - Knob Diameter 44.5 mm | 1.750 in; Thread Size 5/16-18; Knob Height 25.9 mm | 1.020 in

KN5C----4P4B-22

Price Range
$2.02 - $1.42

Stock Levels
1997 In stock
Attributes
  • Knob Diameter
    1.750 in
  • Knob Height
    1.020 in
  • Hub Diameter
    0.750 in
  • Hub Height
    0.520 in
  • Thread Size
    5/16-18
4-Arm Knob - Knob Diameter 35.6 mm | 1.400 in; Thread Size 1/4-20; Stud Length 31.8 mm | 1.250 in

KN4C12504S2-S21

Price Range
$5.38 - $3.76

Stock Levels
1030 In stock
Attributes
  • Knob Diameter
    1.400 in
  • Knob Height
    0.640 in
  • Hub Diameter
    0.550 in
  • Hub Height
    0.180 in
  • Stud Length
    1.250 in
4-Arm Knob - Knob Diameter 44.5 mm | 1.750 in; Thread Size 5/16-18; Stud Length 25.4 mm | 1.000 in

KN5C10004P4--21

Price Range
$2.81 - $1.97

Stock Levels
418 In stock
Attributes
  • Knob Diameter
    1.750 in
  • Knob Height
    1.020 in
  • Hub Diameter
    0.750 in
  • Hub Height
    0.520 in
  • Stud Length
    1.000 in
4-Arm Knob - Knob Diameter 43.9 mm | 1.730 in; Thread Size 10-32; Stud Length 19.1 mm | 0.750 in

KN0207504S4-S21

Price Range
$6.03 - $4.22

Stock Levels
1224 In stock
Attributes
  • Knob Diameter
    1.730 in
  • Knob Height
    0.820 in
  • Hub Diameter
    0.750 in
  • Hub Height
    0.250 in
  • Stud Length
    0.750 in
4-Arm Knob - Knob Diameter 44.5 mm | 1.750 in; Thread Size 5/16-18; Stud Length 63.5 mm | 2.500 in

KN5C25004P4--21

Price Range
$3.27 - $2.28

Stock Levels
84 In stock
Attributes
  • Knob Diameter
    1.750 in
  • Knob Height
    1.020 in
  • Hub Diameter
    0.750 in
  • Hub Height
    0.520 in
  • Stud Length
    2.500 in
4-Arm Knob - Knob Diameter 63.5 mm | 2.500 in; Thread Size 1/2-13; Knob Height 28.7 mm | 1.130 in

KN8C----4P7B-21

Price Range
$3.07 - $2.14

Stock Levels
930 In stock
Attributes
  • Knob Diameter
    2.500 in
  • Knob Height
    1.130 in
  • Hub Diameter
    0.980 in
  • Hub Height
    0.480 in
  • Thread Size
    1/2-13
4-Arm Knob - Knob Diameter 43.9 mm | 1.730 in; Thread Size 5/16-18; Stud Length 63.5 mm | 2.500 in

KN5C25004S4-S21

Price Range
$7.29 - $5.09

Stock Levels
1350 In stock
Attributes
  • Knob Diameter
    1.730 in
  • Knob Height
    0.820 in
  • Hub Diameter
    0.750 in
  • Hub Height
    0.250 in
  • Stud Length
    2.500 in
4-Arm Knob - Knob Diameter 63.5 mm | 2.500 in; Thread Size 1/4-20; Stud Length 25.4 mm | 1.000 in

KN4C10004P7--21

Price Range
$3.83 - $2.68

Stock Levels
312 In stock
Attributes
  • Knob Diameter
    2.500 in
  • Knob Height
    1.130 in
  • Hub Diameter
    0.980 in
  • Hub Height
    0.480 in
  • Stud Length
    1.000 in
4-Arm Knob - Knob Diameter 50.8 mm | 2.000 in; Thread Size 1/4-20; Stud Length 38.1 mm | 1.500 in

KN4C15004S5-S21

Price Range
$7.41 - $5.19

Stock Levels
1360 In stock
Attributes
  • Knob Diameter
    2.000 in
  • Knob Height
    0.820 in
  • Hub Diameter
    0.750 in
  • Hub Height
    0.250 in
  • Stud Length
    1.500 in
4-Arm Knob - Knob Diameter 63.5 mm | 2.500 in; Thread Size 5/16-18; Stud Length 12.7 mm | 0.500 in

KN5C05004P7--21

Price Range
$3.71 - $2.59

Stock Levels
1040 In stock
Attributes
  • Knob Diameter
    2.500 in
  • Knob Height
    1.130 in
  • Hub Diameter
    0.980 in
  • Hub Height
    0.480 in
  • Stud Length
    0.500 in