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Shear-loc Thumb screw knobs
1/4" Thumb Screws


 


Click on the desired thread pitch to go to that part of the page.
Or scroll down to see the whole page.

1/4-20         1/4-28
   UNC-3A                                             UNF-3A

 

1/4-20 SERIES
(All of the screws in the tables below have 3A threads and are fully threaded except part numbers marked with a " * "at the end. Click HERE to see the minimum usable thread length.)

screw one.gif (3924 bytes)
Knurled Style Thumbscrew

       screw four.GIF (3103 bytes)
Rosette Style Thumbscrew

screw two.GIF (3838 bytes)
Tee Style Thumbscrew

screw three.GIF (3685 bytes)
L Style Thumbscrew

Please add Knob color and Screw type prefix to the part number.

B=Black, R=Red, G=Gray, Y=Yellow, A=Alloy, S=Stainless, Z=Zinc plate

For example: A 3/4 diameter. Black Knurled knob fitted with a 1/4-20x3/8 alloy screw would have a part number of 903B-2520-0.37A

Note: Items at the right of the table marked with "X" are standard items "O" are non standard items. Please inquire about the availability of non standards.

Please go to the what's new/etc page. for information on zinc plated screw assemblies marked with a  "O" .

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x3/8

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-0.37wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-20x3/8

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-0.37wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-20x3/8 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-0.37wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x3/8 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-0.37wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x3/8 11/16" L 951wpe28.jpg (705 bytes)-2520-0.37wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x1/2

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-0.50wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-20x1/2

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-0.50wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-20x1/2 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-0.50wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x1/2 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-0.50wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x1/2 11/16" L 951wpe28.jpg (705 bytes)-2520-0.50wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x5/8

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-0.62wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-20x5/8

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-0.62wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-20x5/8 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-0.62wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x5/8 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-0.62wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x5/8 11/16" L 951wpe28.jpg (705 bytes)-2520-0.62wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x3/4

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-0.75wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-20x3/4

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-0.75wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-20x3/4 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-0.75wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x3/4 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-0.75wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x3/4 11/16" L 951wpe28.jpg (705 bytes)-2520-0.75wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x7/8

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-0.87wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-20x7/8

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-0.87wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-20x7/8 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-0.87wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x7/8 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-0.87wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x7/8 11/16" L 951wpe28.jpg (705 bytes)-2520-0.87wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x1.0

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-1.00wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-20x1.0

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-1.00wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-20x1.0 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-1.00wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x1.0 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-1.00wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x1.0 11/16" L 951wpe28.jpg (705 bytes)-2520-1.00wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x1 1/4

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-1.25wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-20x1 1/4

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-1.25wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-20x1 1/4 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-1.25wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x1 1/4 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-1.25wpe1D.jpg (705 bytes) x x x x x x o
1/4-20x1 1/4 11/16" L 951wpe28.jpg (705 bytes)-2520-1.25wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x1 1/2

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-1.50wpe1D.jpg (705 bytes)*

x

x

x x x x o

1/4-20x1 1/2

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-1.50wpe1D.jpg (705 bytes)*

x

x x x x x o
1/4-20x1 1/2 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-1.50wpe1D.jpg (705 bytes)* x x x x x x o
1/4-20x1 1/2 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-1.50wpe1D.jpg (705 bytes)* x x x x x x o
1/4-20x1 1/2 11/16" L 951wpe28.jpg (705 bytes)-2520-1.50wpe1D.jpg (705 bytes)* x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x1 3/4

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-1.75wpe1D.jpg (705 bytes)*

x

x

x x x x o

1/4-20x1 3/4

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-1.75wpe1D.jpg (705 bytes)*

x

x x x x x o
1/4-20x1 3/4 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-1.75wpe1D.jpg (705 bytes)* x x x x x x o
1/4-20x1 3/4 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-1.75wpe1D.jpg (705 bytes)* x x x x x x o
1/4-20x1 3/4 11/16" L 951wpe28.jpg (705 bytes)-2520-1.75wpe1D.jpg (705 bytes)* x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x2

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-2.00wpe1D.jpg (705 bytes)*

x

x

x x x x o

1/4-20x2

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-2.00wpe1D.jpg (705 bytes)*

x

x x x x x o
1/4-20x2 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-2.00wpe1D.jpg (705 bytes)* x x x x x x o
1/4-20x2 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-2.00wpe1D.jpg (705 bytes)* x x x x x x o
1/4-20x2 11/16" L 951wpe28.jpg (705 bytes)-2520-2.00wpe1D.jpg (705 bytes)* x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x2 1/2

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-2.50wpe1D.jpg (705 bytes)*

x

x

x x x o o

1/4-20x2 1/2

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-2.50wpe1D.jpg (705 bytes)*

x

x x x x o o
1/4-20x2 1/2 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-2.50wpe1D.jpg (705 bytes)* x x x x x o o
1/4-20x2 1/2 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-2.50wpe1D.jpg (705 bytes)* x x x x x o o
1/4-20x2 1/2 11/16" L 951wpe28.jpg (705 bytes)-2520-2.50wpe1D.jpg (705 bytes)* x x x x x o o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-20x3

3/4" Knurled

903wpe28.jpg (705 bytes)-2520-3.00wpe1D.jpg (705 bytes)*

x

x

x x x o o

1/4-20x3

1.0" Knurled

904wpe28.jpg (705 bytes)-2520-3.00wpe1D.jpg (705 bytes)*

x

x x x x o o
1/4-20x3 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2520-3.00wpe1D.jpg (705 bytes)* x x x x x o o
1/4-20x3 1 1/4" Tee 924wpe28.jpg (705 bytes)-2520-3.00wpe1D.jpg (705 bytes)* x x x x x o o
1/4-20x3 11/16" L 951wpe28.jpg (705 bytes)-2520-3.00wpe1D.jpg (705 bytes)* x x x x x o o


We also offer many other standard & semi standard screw lengths fully and not fully threaded.
  Please call for more information

1-800-775-5668

Click here to go back to the Thumb Screw selection page.

Don't forget about our knobs only and convenient knob kits
For purchasing information go to FAQ

 

 

1/4-28 SERIES
(All of the screws in the tables below have 3A threads and are fully threaded except part numbers marked with a " * " at the end. Click HERE to see the minimum usable thread length.)

screw one.gif (3924 bytes)
Knurled Style Thumbscrew

       screw four.GIF (3103 bytes)
Rosette Thumbscrew

screw two.GIF (3838 bytes)
Tee Style Thumbscrew

screw three.GIF (3685 bytes)
L Style Thumbscrew

 

 

Please add Knob color and Screw type prefix to the part number.

B=Black, R=Red, G=Gray, Y=Yellow, A=Alloy, S=Stainless, Z=Zinc plate

For example: A 3/4 diameter Black Knurled knob fitted with a 1/4-28x3/8 alloy screw would have a part number of 903B-2528-0.37A

Note: Items at the right of the table marked with "X" are standard items "O" are non standard items. Please inquire about the availability of non standards.

Please go to the what's new/etc page. for information on zinc plated screw assemblies marked with a  "O" .

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-28x3/8

3/4" Knurled

903wpe28.jpg (705 bytes)-2528-0.37wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-28x3/8

1.0" Knurled

904wpe28.jpg (705 bytes)-2528-0.37wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-28x3/8 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2528-0.37wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x3/8 1 1/4" Tee 924wpe28.jpg (705 bytes)-2528-0.37wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x3/8 11/16" L 951wpe28.jpg (705 bytes)-2528-0.37wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-28x1/2

3/4" Knurled

903wpe28.jpg (705 bytes)-2528-0.50wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-28x1/2

1.0" Knurled

904wpe28.jpg (705 bytes)-2528-0.50wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-28x1/2 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2528-0.50wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x1/2 1 1/4" Tee 924wpe28.jpg (705 bytes)-2528-0.50wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x1/2 11/16" L 951wpe28.jpg (705 bytes)-2528-0.50wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-28x5/8

3/4" Knurled

903wpe28.jpg (705 bytes)-2528-0.62wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-28x5/8

1.0" Knurled

904wpe28.jpg (705 bytes)-2528-0.62wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-28x5/8 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2528-0.62wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x5/8 1 1/4" Tee 924wpe28.jpg (705 bytes)-2528-0.62wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x5/8 11/16" L 951wpe28.jpg (705 bytes)-2528-0.62wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-28x3/4

3/4" Knurled

903wpe28.jpg (705 bytes)-2528-0.75wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-28x3/4

1.0" Knurled

904wpe28.jpg (705 bytes)-2528-0.75wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-28x3/4 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2528-0.75wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x3/4 1 1/4" Tee 924wpe28.jpg (705 bytes)-2528-0.75wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x3/4 11/16" L 951wpe28.jpg (705 bytes)-2528-0.75wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-28x7/8

3/4" Knurled

903wpe28.jpg (705 bytes)-2528-0.87wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-28x7/8

1.0" Knurled

904wpe28.jpg (705 bytes)-2528-0.87wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-28x7/8 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2528-0.87wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x7/8 1 1/4" Tee 924wpe28.jpg (705 bytes)-2528-0.87wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x7/8 11/16" L 951wpe28.jpg (705 bytes)-2528-0.87wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-28x1.0

3/4" Knurled

903wpe28.jpg (705 bytes)-2528-1.00wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-28x1.0

1.0" Knurled

904wpe28.jpg (705 bytes)-2528-1.00wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-28x1.0 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2528-1.00wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x1.0 1 1/4" Tee 924wpe28.jpg (705 bytes)-2528-1.00wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x1.0 11/16" L 951wpe28.jpg (705 bytes)-2528-1.00wpe1D.jpg (705 bytes) x x x x x x o

Screw/L Dim

A Dim./Style

Part Number

B

R

G

Y

A S Z

1/4-28x1 1/4

3/4" Knurled

903wpe28.jpg (705 bytes)-2528-1.25wpe1D.jpg (705 bytes)

x

x

x x x x o

1/4-28x1 1/4

1.0" Knurled

904wpe28.jpg (705 bytes)-2528-1.25wpe1D.jpg (705 bytes)

x

x x x x x o
1/4-28x1 1/4 1 1/2" Rosette 907wpe28.jpg (705 bytes)-2528-1.25wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x1 1/4 1 1/4" Tee 924wpe28.jpg (705 bytes)-2528-1.25wpe1D.jpg (705 bytes) x x x x x x o
1/4-28x1 1/4 11/16" L 951wpe28.jpg (705 bytes)-2528-1.25wpe1D.jpg (705 bytes) x x x x x x o

Note: Listed are Shear-Loc's standard Full Thread offerings.
We also offer many other standard & semi standard screw lengths fully and not fully threaded.
  Please call for more information

1-800-775-5668

Don't forget about our knobs only and convenient knob kits
For purchasing information go to FAQ

 

Knobs Manufactured in the U.S.A. by:

Shear-Loc Products under USA patent no. 5,017,068
and E.U. patent 0551295

Contact Information

  Telephone:

1-800-775-5668   Office hours  8:00AM - 5:00PM  PST
1-949-768-8985

  FAX:

1-949-768-8705 24Hrs. 7Days

  Postal address:

23191 Peralta Dr.
Laguna Hills Ca. 92653-1499

  Electronic mail:

Sales: Sales@shear-loc.com
Customer Support: Support@shear-loc.com
Webmaster: Markfk@shear-loc.com

    Last Modified:January 09, 2014