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3 Arm Prong Knobs

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3-arm prong knobs are among the most common type of lobed knob, allowing easy access even with thick gloves on for small adjustments to equipment and workpieces across industries.

Find inch and metric 3-lobed knobs at Reid Supply in both female and male thread inserts of a variety of materials, including plastic, stainless steel, and brass insert threading in Reid Supply’s online catalog.

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Product SKUs information
Item Code Price range Availability Thread Size Overall Diameter Mount Type Thread Length Knob Material Overall Height Brand View
$1.18 - $1.85 814 In stock
3/8-16
1.570 in
Male
1.500 in
Thermoplastic
Reid Select
$1.41 - $2.22 Request the lead time here
1/4-20
1.570 in
Male
1.250 in
Thermoplastic
Reid Select
$1.82 - $2.86 Request the lead time here
5/16-18
1.970 in
Male
1.000 in
Thermoplastic
Reid Select
$2.69 - $4.22 Request the lead time here
5/16-18
1.970 in
Male
0.750 in
Polyamide
Reid Select
$2.95 - $2.95 15 In stock
1/4-20
1.180 in
Male
0.500 in
Thermoplastic
Reid Select
$1.97 - $3.10 Request the lead time here
3/8-16
1.970 in
Male
1.000 in
Thermoplastic
Reid Select
$3.58 - $5.62 Request the lead time here
M8
1.969 in
Male
1.299 in
Polyamide
Reid Select
$3.37 - $5.30 Request the lead time here
M6
1.969 in
Male
1.181 in
Polyamide
Reid Select
$2.59 - $2.59 168 In stock
1/4-20
1.180 in
Male
1.000 in
Thermoplastic
Reid Select
$1.11 - $1.75 132 In stock
5/16-18
1.570 in
Male
1.500 in
Thermoplastic
Reid Select
$2.94 - $4.62 Request the lead time here
3/8-16
1.970 in
Male
1.500 in
Polyamide
Reid Select
$3.44 - $5.40 Request the lead time here
M10
1.969 in
Male
0.787 in
Polyamide
Reid Select
$4.99 - $7.84 Request the lead time here
5/8-11
4.920 in
Male
1.180 in
Thermoplastic
Reid Select
$1.81 - $2.84 Request the lead time here
5/16-18
1.570 in
Female
0.550 in
Thermoplastic
0.980 in
Reid Select
$49.21 - $54.68 17 In stock
1/2-13
2.36 in
Threaded Blind Bore
0.870 in
Stainless Steel
1.610 in
J.W. Winco Inc.
$1.78 - $1.78 Request the lead time here
5/16-18
2.000 in
Male
0.750 in
Phenolic
1.000 in
Reid Select
$1.09 - $1.09 857 In stock
1/4-20
1.125 in
Male
0.500 in
Phenolic
0.750 in
Reid Select
$2.66 - $4.18 Request the lead time here
3/8-16
1.970 in
Female
0.550 in
Thermoplastic
1.220 in
Reid Select
$25.42 - $28.25 17 In stock
1/4-20
1.570 in
Threaded Blind Bore
0.470 in
Stainless Steel
1.020 in
J.W. Winco Inc.
$25.17 - $27.97 8 In stock
M6
1.575 in
Threaded Blind Bore
0.472 in
Stainless Steel
1.024 in
J.W. Winco Inc.
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Lobed Knob - Male; 1.570 in; 3/8-16; Steel

RST-140

Price Range
$1.85 - $1.18

Stock Levels
814 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    1.500 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.570 in
Quick View
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Lobed Knob - Male; 1.570 in; 1/4-20; Steel

RST-135

Price Range
$2.22 - $1.41

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/4-20
  • Thread Length
    1.250 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.570 in
Quick View
View Product >
Lobed Knob - Male; 1.970 in; 5/16-18; Steel

RST-145

Price Range
$2.86 - $1.82

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    1.000 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.970 in
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View Product >
Lobed Knob - Male; 1.970 in; 5/16-18; Steel

RST-220

Price Range
$4.22 - $2.69

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    0.750 in
  • Knob Material
    Polyamide
  • Overall Diameter
    1.970 in
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Lobed Knob - Male; 1.180 in; 1/4-20; Steel

RK-304

Price Range
$2.95 - $2.95

Stock Levels
15 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/4-20
  • Thread Length
    0.500 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.180 in
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View Product >
Lobed Knob - Male; 1.970 in; 3/8-16; Steel

RST-142

Price Range
$3.10 - $1.97

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    1.000 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.970 in
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Lobed Knob - Male; 50.0 mm; M8; Steel

RST-212

Price Range
$5.62 - $3.58

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    M8
  • Thread Length
    1.299 in
  • Knob Material
    Polyamide
  • Overall Diameter
    1.969 in
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Lobed Knob - Male; 50.0 mm; M6; Steel

RST-208

Price Range
$5.30 - $3.37

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    M6
  • Thread Length
    1.181 in
  • Knob Material
    Polyamide
  • Overall Diameter
    1.969 in
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Lobed Knob - Male; 1.180 in; 1/4-20; Steel

RK-305

Price Range
$2.59 - $2.59

Stock Levels
168 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/4-20
  • Thread Length
    1.000 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.180 in
Quick View
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Lobed Knob - Male; 1.570 in; 5/16-18; Steel

RST-138

Price Range
$1.75 - $1.11

Stock Levels
132 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    1.500 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.570 in
Quick View
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Lobed Knob - Male; 1.970 in; 3/8-16; Steel

RST-224

Price Range
$4.62 - $2.94

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    1.500 in
  • Knob Material
    Polyamide
  • Overall Diameter
    1.970 in
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Lobed Knob - Male; 50.0 mm; M10; Steel

RST-214

Price Range
$5.40 - $3.44

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    M10
  • Thread Length
    0.787 in
  • Knob Material
    Polyamide
  • Overall Diameter
    1.969 in
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Lobed Knob - Male; 4.920 in; 5/8-11; Plastic

JCL-455

Price Range
$7.84 - $4.99

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/8-11
  • Thread Length
    1.180 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    4.920 in
Quick View
View Product >
Lobed Knob - Female; 1.570 in; 5/16-18; Brass

RST-124

Price Range
$2.84 - $1.81

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    0.550 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.570 in
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Lobed Knob - Threaded Blind Bore; 2.36 in; 1/2-13; Stainless Steel

WTH-40

Price Range
$54.68 - $49.21

Stock Levels
17 In stock
Attributes
  • Brand
    J.W. Winco Inc.
  • Thread Size
    1/2-13
  • Thread Length
    0.870 in
  • Knob Material
    Stainless Steel
  • Overall Diameter
    2.36 in
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Lobed Knob - Male; 2.000 in; 5/16-18; Steel

DK-1219

Price Range
$1.78 - $1.78

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    0.750 in
  • Knob Material
    Phenolic
  • Overall Diameter
    2.000 in
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Lobed Knob - Male; 1.125 in; 1/4-20; Steel

DK-1216

Price Range
$1.09 - $1.09

Stock Levels
857 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/4-20
  • Thread Length
    0.500 in
  • Knob Material
    Phenolic
  • Overall Diameter
    1.125 in
Quick View
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Lobed Knob - Female; 1.970 in; 3/8-16; Brass

RST-118

Price Range
$4.18 - $2.66

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    0.550 in
  • Knob Material
    Thermoplastic
  • Overall Diameter
    1.970 in
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Lobed Knob - Threaded Blind Bore; 1.570 in; 1/4-20; Stainless Steel

WTH-15

Price Range
$28.25 - $25.42

Stock Levels
17 In stock
Attributes
  • Brand
    J.W. Winco Inc.
  • Thread Size
    1/4-20
  • Thread Length
    0.470 in
  • Knob Material
    Stainless Steel
  • Overall Diameter
    1.570 in
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Lobed Knob - Threaded Blind Bore; 40.0 mm; M6; Stainless Steel

WTH-55

Price Range
$27.97 - $25.17

Stock Levels
8 In stock
Attributes
  • Brand
    J.W. Winco Inc.
  • Thread Size
    M6
  • Thread Length
    0.472 in
  • Knob Material
    Stainless Steel
  • Overall Diameter
    1.575 in
Quick View
View Product >