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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
$2.01 - $2.01 Request the lead time here
3/8-16
Female
0.900 in
Thermoplastic
Reid Select
$4.21 - $4.21 Request the lead time here
1/2-13
Female
0.900 in
Thermoplastic
Reid Select
$1.32 - $2.08 Request the lead time here
1/4-20
Female
0.390 in
Thermoplastic
Reid Select
$3.93 - $6.18 Request the lead time here
3/8-16
Female
0.550 in
Thermoplastic
Reid Select
$1.81 - $2.84 Request the lead time here
5/16-18
Female
0.550 in
Thermoplastic
Reid Select
$1.09 - $1.09 36 In stock
#10-32
Female
0.550 in
Thermoplastic
Reid Select
$2.89 - $2.89 135 In stock
1/4-20
Female
0.700 in
Thermoplastic
Reid Select
$1.59 - $2.50 Request the lead time here
1/4-20
Female
0.390 in
Thermoplastic
Reid Select
$4.37 - $6.86 Request the lead time here
1/2-13
Female
0.750 in
Thermoplastic
Reid Select
$2.01 - $3.16 Request the lead time here
5/16-18
Female
0.550 in
Thermoplastic
Reid Select
$31.06 - $31.06 12 In stock
5/16-18
Threaded Blind Bore
0.590 in
Stainless Steel
J.W. Winco Inc.
$57.41 - $57.41 15 In stock
1/2-13
Threaded Blind Bore
0.870 in
Stainless Steel
J.W. Winco Inc.
$30.74 - $30.74 34 In stock
M8
Threaded Blind Bore
0.591 in
Stainless Steel
J.W. Winco Inc.
$3.22 - $3.22 1008 In stock
3/8-16
Female w/Locking Element
0.580 in
Polypropylene
Reid Select
$55.68 - $55.68 1 In stock
M10
Threaded Blind Bore
0.709 in
Stainless Steel
J.W. Winco Inc.
$2.93 - $2.93 1256 In stock
5/16-18
Female w/Locking Element
0.470 in
Polypropylene
Reid Select
$1.61 - $2.53 Request the lead time here
5/16-18
Male
0.980 in
Thermoplastic
Reid Select
$1.83 - $2.88 250 In stock
3/8-16
Male
1.180 in
Thermoplastic
Reid Select
$1.61 - $2.53 Request the lead time here
3/8-16
Male
0.980 in
Thermoplastic
Reid Select
$1.83 - $2.88 53 In stock
1/2-13
Male
1.180 in
Thermoplastic
Reid Select
    • of 7
Lobed Knob - 3/8-16; 1.0800 in; Female; Thermoplastic, PT-CL-TRIAD-55

RK-323

Price Range
$2.01 - $2.01

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    0.900 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 1/2-13; 1.0800 in; Female; Thermoplastic, PT-CL-TRIAD-55

RK-324

Price Range
$4.21 - $4.21

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/2-13
  • Thread Length
    0.900 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 1/4-20; 0.790 in; Female; Thermoplastic, 11003832305

RST-114

Price Range
$2.08 - $1.32

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/4-20
  • Thread Length
    0.390 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 3/8-16; 1.540 in; Female; Thermoplastic, 11003863303

RST-119

Price Range
$6.18 - $3.93

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    0.550 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 5/16-18; 0.980 in; Female; Thermoplastic, 11003840405

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
  • Material
    Brass
Quick View
View Product >
Lobed Knob - #10-32; 0.6500 in; Female; Thermoplastic, PT-CL-TRIAD-30

RK-300

Price Range
$1.09 - $1.09

Stock Levels
36 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    #10-32
  • Thread Length
    0.550 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 1/4-20; 0.8900 in; Female; Thermoplastic, PT-CL-TRIAD-45

RK-314

Price Range
$2.89 - $2.89

Stock Levels
135 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/4-20
  • Thread Length
    0.700 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 1/4-20; 0.980 in; Female; Thermoplastic, 11003840307

RST-115

Price Range
$2.50 - $1.59

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/4-20
  • Thread Length
    0.390 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 1/2-13; 1.540 in; Female; Thermoplastic, 11003863304

RST-120

Price Range
$6.86 - $4.37

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/2-13
  • Thread Length
    0.750 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 5/16-18; 0.980 in; Female; Thermoplastic, 11003850403

RST-125

Price Range
$3.16 - $2.01

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    0.550 in
  • Knob Material
    Thermoplastic
  • Material
    Brass
Quick View
View Product >
Lobed Knob - 5/16-18; 1.020 in; Threaded Blind Bore; Stainless Steel, 5TCZ1/EMT

WTH-20

Price Range
$31.06 - $31.06

Stock Levels
12 In stock
Attributes
  • Brand
    J.W. Winco Inc.
  • Thread Size
    5/16-18
  • Thread Length
    0.590 in
  • Knob Material
    Stainless Steel
  • Material
    Stainless Steel
Quick View
View Product >
Lobed Knob - 1/2-13; 1.610 in; Threaded Blind Bore; Stainless Steel, 8TCZ3/EMT

WTH-40

Price Range
$57.41 - $57.41

Stock Levels
15 In stock
Attributes
  • Brand
    J.W. Winco Inc.
  • Thread Size
    1/2-13
  • Thread Length
    0.870 in
  • Knob Material
    Stainless Steel
  • Material
    Stainless Steel
Quick View
View Product >
Lobed Knob - M8; 26.0 mm; Threaded Blind Bore; Stainless Steel, 8NCZ1/EMT

WTH-60

Price Range
$30.74 - $30.74

Stock Levels
34 In stock
Attributes
  • Brand
    J.W. Winco Inc.
  • Thread Size
    M8
  • Thread Length
    0.591 in
  • Knob Material
    Stainless Steel
  • Material
    Stainless Steel
Quick View
View Product >
Lobed Knob - 3/8-16; 0.870 in; Female w/Locking Element; Polypropylene, 1028

KLK-20

Price Range
$3.22 - $3.22

Stock Levels
1008 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    0.580 in
  • Knob Material
    Polypropylene
  • Material
    Steel
Quick View
View Product >
Lobed Knob - M10; 41.0 mm; Threaded Blind Bore; Stainless Steel, 10NCZ3/EMT

WTH-75

Price Range
$55.68 - $55.68

Stock Levels
1 In stock
Attributes
  • Brand
    J.W. Winco Inc.
  • Thread Size
    M10
  • Thread Length
    0.709 in
  • Knob Material
    Stainless Steel
  • Material
    Stainless Steel
Quick View
View Product >
Lobed Knob - 5/16-18; 0.870 in; Female w/Locking Element; Polypropylene, 1028

KLK-15

Price Range
$2.93 - $2.93

Stock Levels
1256 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    0.470 in
  • Knob Material
    Polypropylene
  • Material
    Steel
Quick View
View Product >
Lobed Knob - 5/16-18; ; Male; Thermoplastic, 76465

JCL-405

Price Range
$2.53 - $1.61

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    5/16-18
  • Thread Length
    0.980 in
  • Knob Material
    Thermoplastic
  • Material
    Steel
Quick View
View Product >
Lobed Knob - 3/8-16; ; Male; Thermoplastic, 76485

JCL-425

Price Range
$2.88 - $1.83

Stock Levels
250 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    1.180 in
  • Knob Material
    Thermoplastic
  • Material
    Steel
Quick View
View Product >
Lobed Knob - 3/8-16; ; Male; Thermoplastic, 76465

JCL-410

Price Range
$2.53 - $1.61

Stock Levels
Request the lead time here
Attributes
  • Brand
    Reid Select
  • Thread Size
    3/8-16
  • Thread Length
    0.980 in
  • Knob Material
    Thermoplastic
  • Material
    Steel
Quick View
View Product >
Lobed Knob - 1/2-13; ; Male; Thermoplastic, 76485

JCL-430

Price Range
$2.88 - $1.83

Stock Levels
53 In stock
Attributes
  • Brand
    Reid Select
  • Thread Size
    1/2-13
  • Thread Length
    1.180 in
  • Knob Material
    Thermoplastic
  • Material
    Steel
Quick View
View Product >