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#4 Thumb Screws

 

 

4-40 SERIES
(All of the screws in the tables below have 3A threads and are fully threaded )
(Screws longer than listed are available but are normally not fully threaded.)

 


Knurled 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 ex:A 5/16 dia. Black Knurled knob fitted with a 4-40x1/4 alloy screw would have a part number of 899B-0440-0.25A

Note:Items at the right of the table marked with "X" are 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  * .

Screw/L Dim.

A Dim./Style

Part Number

B

R

G

Y

 A S Z

4-40x1/4"

5/16 Knurled

899-0440-0.25

x

 x x x x x *

4-40x3/8"

5/16 Knurled

899-0440-0.37

x

 x x x x x *
4-40x1/2 5/16 Knurled 899-0440-0.50 x x x x x x *
4-40x5/8 5/16 Knurled 899-0440-0.62 x x x x x x *
4-40x3/4 5/16 Knurled 899-0440-0.75 x x x x x x *
4-40x7/8 5/16 Knurled 899-0440-0.87 x x x x x x *
4-40x1.0 5/16 Knurled 899-0440-1.00 x x x x x x *

Note: Listed are Shear-Loc's standard Full Thread offerings.
We also offer many other standard & semi standard screw lengths.
  Please call for more information

1-800-638-1830

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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

How to order: Please preface each Shear-Loc part number with 'R973-'
Example: R973-928B-0305-006A

click here for a 'request for quotation' form Use Our Secure Order Form click here for faxable order forms
Phones: (800) 638-1830 or (410) 358-3130 are available Monday-Friday 8:30 AM to 5:30 PM Eastern time.
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