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Thumb Screw Knobs

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Thumb screw knobs can be press-fit onto screws to create a small knob for clamping or securing quickly and easily with just the thumb and forefinger.

The wide variety of thumb screw knobs we supply can be used with any length screw and come in a variety of knurling patterns or wing-tip designs. They are ideal for applications where space is restricted and fastening with a tool is not possible.

We carry thumb screws in a variety of styles, including:


The versatility of thumb screw knobs extends to overlapping styles, including knurled lobed and many others. Browse our online catalog to see every style, size, and application type of thumb screw knob available with the quickest lead times.

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For large volumes and customised products, add to your cart and click request a quote, orcontact usand we will respond within 2 working days.

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55 results
Product SKUs information
Item Code Price range Availability Knob Diameter Knob Style Special Offer Compatible Screw Sizes Brand View
$0.41 - $0.65 8 In stock
0.750 in
Push-Pull Knobs
New
Reid Select
$0.48 - $0.48 56 In stock
0.374 in
Knurled
Shear-Loc
$0.48 - $0.48 475 In stock
0.512 in
Knurled
Shear-Loc
$0.40 - $0.40 Click here for lead time.
0.626 in
Knurled
Shear-Loc
$0.55 - $0.55 117 In stock
0.748 in
Knurled
Shear-Loc
$0.55 - $0.55 1 In stock
0.752 in
Knurled
Shear-Loc
$0.69 - $0.69 101 In stock
1.024 in
Knurled
Shear-Loc
$0.83 - $0.83 226 In stock
1.024 in
Knurled
Shear-Loc
$79.77 - $125.36 Click here for lead time.
Knurled, Lobed, Wing
Shear-Loc
$0.56 - $0.56 Click here for lead time.
1.375 in
L-Knob
Shear-Loc
$0.35 - $0.35 53 In stock
1.5 in
Lobed
Clearance
Shear-Loc
$1.19 - $1.19 Click here for lead time.
1.5 in
Lobed
Shear-Loc
$0.48 - $0.48 Click here for lead time.
1.024 in
Wing
Shear-Loc
$0.56 - $0.56 Click here for lead time.
1.25 in
Wing
Shear-Loc
$0.48 - $0.48 896 In stock
0.500 in
Knurled
Shear-Loc
$0.48 - $0.48 Click here for lead time.
0.626 in
Knurled
Shear-Loc
$0.55 - $0.55 Click here for lead time.
0.748 in
Knurled
Shear-Loc
$0.15 - $0.15 30 In stock
0.752 in
Knurled
Clearance
Shear-Loc
$0.21 - $0.21 9 In stock
1 in
Knurled
Clearance
Shear-Loc
$80.30 - $126.19 Click here for lead time.
Knurled, Lobed, Wing
Shear-Loc
  • of 3
Push-Pull Knurled Knobs; , ,

ICK-2370

Price Range
$0.65 - $0.41

Stock Levels
8 In stock
Attributes
  • Brand
    Reid Select
  • Knob Diameter
    0.750 in
  • Knob Style
    Push-Pull Knobs
  • Special Offer
    New
Thumb Screw Knob; Knurled, Black, Delrin

SLK-2

Price Range
$0.48 - $0.48

Stock Levels
56 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.327 in
  • Knob Diameter
    0.374 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-300

Price Range
$0.48 - $0.48

Stock Levels
475 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.386 in
  • Knob Diameter
    0.512 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Gray, Delrin

SLK-4G

Price Range
$0.40 - $0.40

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.421 in
  • Knob Diameter
    0.626 in
  • Color
    Gray
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-500

Price Range
$0.55 - $0.55

Stock Levels
117 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.512 in
  • Knob Diameter
    0.748 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-5R

Price Range
$0.55 - $0.55

Stock Levels
1 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.500 in
  • Knob Diameter
    0.752 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Gray, Delrin

SLK-600G

Price Range
$0.69 - $0.69

Stock Levels
101 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.512 in
  • Knob Diameter
    1.024 in
  • Color
    Gray
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-700

Price Range
$0.83 - $0.83

Stock Levels
226 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.63 in
  • Knob Diameter
    1.024 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Lobed, Wing, Black, Delrin

SLK-621

Price Range
$125.36 - $79.77

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
  • Knob Style
    Knurled, Lobed, Wing
  • Material
    Delrin
Thumb Screw Knob; L-Knob, Red, Delrin

SLK-16R

Price Range
$0.56 - $0.56

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.516 in
  • Knob Diameter
    1.375 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Red, Delrin

SLK-10R

Price Range
$0.35 - $0.35

Stock Levels
53 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.705 in
  • Knob Diameter
    1.5 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Red, Delrin

SLK-8R

Price Range
$1.19 - $1.19

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.531 in
  • Knob Diameter
    1.5 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Black, Delrin

SLK-1100

Price Range
$0.48 - $0.48

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.472 in
  • Knob Diameter
    1.024 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Red, Delrin

SLK-12R

Price Range
$0.56 - $0.56

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.516 in
  • Knob Diameter
    1.25 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-3R

Price Range
$0.48 - $0.48

Stock Levels
896 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.374 in
  • Knob Diameter
    0.500 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-4R

Price Range
$0.48 - $0.48

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.421 in
  • Knob Diameter
    0.626 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Gray, Delrin

SLK-500G

Price Range
$0.55 - $0.55

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.512 in
  • Knob Diameter
    0.748 in
  • Color
    Gray
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Yellow, Delrin

SLK-5Y

Price Range
$0.15 - $0.15

Stock Levels
30 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.500 in
  • Knob Diameter
    0.752 in
  • Color
    Yellow
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-6R

Price Range
$0.21 - $0.21

Stock Levels
9 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.500 in
  • Knob Diameter
    1 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Lobed, Wing, Black, Delrin

SLK-260

Price Range
$126.19 - $80.30

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
  • Includes
    260 Pcs. Metric Asst. - Black 20 Ea. of SLK-200 thru SLK-1300
  • Knob Style
    Knurled, Lobed, Wing
Thumb Screw Knob; Wing, Red, Delrin

SLK-11R

Price Range
$0.48 - $0.48

Stock Levels
45 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.437 in
  • Knob Diameter
    1.00 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-1

Price Range
$0.39 - $0.39

Stock Levels
25 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.28 in
  • Knob Diameter
    0.311 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-2R

Price Range
$0.48 - $0.48

Stock Levels
256 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.327 in
  • Knob Diameter
    0.374 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-4

Price Range
$0.48 - $0.48

Stock Levels
1558 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.421 in
  • Knob Diameter
    0.626 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Yellow, Delrin

SLK-4Y

Price Range
$0.48 - $0.48

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.421 in
  • Knob Diameter
    0.626 in
  • Color
    Yellow
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-500R

Price Range
$0.15 - $0.15

Stock Levels
83 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.512 in
  • Knob Diameter
    0.748 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-6

Price Range
$0.84 - $0.84

Stock Levels
148 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.500 in
  • Knob Diameter
    1 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Yellow, Delrin

SLK-6Y

Price Range
$0.84 - $0.84

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.500 in
  • Knob Diameter
    1 in
  • Color
    Yellow
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-7R

Price Range
$0.83 - $0.83

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.594 in
  • Knob Diameter
    1 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Lobed, Wing, L-Knob, Black, Delrin

SLK-622

Price Range
$151.36 - $96.32

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
  • Knob Style
    Knurled, Lobed, Wing, L-Knob
  • Material
    Delrin
Thumb Screw Knob; Lobed, Black, Delrin

SLK-1000

Price Range
$1.29 - $1.29

Stock Levels
3171 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.768 in
  • Knob Diameter
    1.496 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Black, Delrin

SLK-8

Price Range
$1.19 - $1.19

Stock Levels
205 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.531 in
  • Knob Diameter
    1.5 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Black, Delrin

SLK-900

Price Range
$1.19 - $1.19

Stock Levels
134 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.63 in
  • Knob Diameter
    1.496 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Black, Delrin

SLK-12

Price Range
$0.56 - $0.56

Stock Levels
742 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.516 in
  • Knob Diameter
    1.25 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Black, Delrin

SLK-13

Price Range
$0.65 - $0.65

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.626 in
  • Knob Diameter
    1.50 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-200

Price Range
$0.48 - $0.48

Stock Levels
1086 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.327 in
  • Knob Diameter
    0.378 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-700R

Price Range
$0.31 - $0.31

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.63 in
  • Knob Diameter
    1.024 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Black, Delrin

SLK-10

Price Range
$1.29 - $1.29

Stock Levels
210 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.705 in
  • Knob Diameter
    1.5 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Yellow, Delrin

SLK-10Y

Price Range
$1.29 - $1.29

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.705 in
  • Knob Diameter
    1.5 in
  • Color
    Yellow
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Black, Delrin

SLK-9

Price Range
$1.19 - $1.19

Stock Levels
41 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.579 in
  • Knob Diameter
    1.5 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Yellow, Delrin

SLK-12Y

Price Range
$0.56 - $0.56

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.516 in
  • Knob Diameter
    1.25 in
  • Color
    Yellow
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Red, Delrin

SLK-1R

Price Range
$0.30 - $0.30

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.28 in
  • Knob Diameter
    0.311 in
  • Color
    Red
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-3

Price Range
$0.48 - $0.48

Stock Levels
138 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.374 in
  • Knob Diameter
    0.500 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-400

Price Range
$0.14 - $0.14

Stock Levels
765 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.453 in
  • Knob Diameter
    0.63 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-5

Price Range
$0.55 - $0.55

Stock Levels
1183 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.500 in
  • Knob Diameter
    0.752 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Gray, Delrin

SLK-5G

Price Range
$0.47 - $0.47

Stock Levels
Click here for lead time.
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.500 in
  • Knob Diameter
    0.752 in
  • Color
    Gray
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-600

Price Range
$0.84 - $0.84

Stock Levels
312 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.512 in
  • Knob Diameter
    1.024 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Black, Delrin

SLK-7

Price Range
$0.83 - $0.83

Stock Levels
275 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.594 in
  • Knob Diameter
    1 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Knurled, Lobed, Wing, Black, Delrin

SLK-280

Price Range
$126.19 - $80.30

Stock Levels
2 In stock
Attributes
  • Brand
    Shear-Loc
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
  • Knob Style
    Knurled, Lobed, Wing
  • Material
    Delrin
Thumb Screw Knob; L-Knob, Black, Delrin

SLK-16

Price Range
$0.56 - $0.56

Stock Levels
106 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.516 in
  • Knob Diameter
    1.375 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Gray, Delrin

SLK-10G

Price Range
$0.35 - $0.35

Stock Levels
240 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.705 in
  • Knob Diameter
    1.5 in
  • Color
    Gray
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Lobed, Black, Delrin

SLK-800

Price Range
$1.19 - $1.19

Stock Levels
894 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.555 in
  • Knob Diameter
    1.496 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Black, Delrin

SLK-11

Price Range
$0.33 - $0.33

Stock Levels
285 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.437 in
  • Knob Diameter
    1.00 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Black, Delrin

SLK-1200

Price Range
$0.56 - $0.56

Stock Levels
110 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.531 in
  • Knob Diameter
    1.181 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin
Thumb Screw Knob; Wing, Black, Delrin

SLK-1300

Price Range
$0.18 - $0.18

Stock Levels
52 In stock
Attributes
  • Brand
    Shear-Loc
  • Base Diameter
    0.65 in
  • Knob Diameter
    1.496 in
  • Color
    Black
  • Full Material
    Delrin 500 Acetal Resin