Manufactured By the Ohio Nut & Bolt Co.
ST Thumbscrew
part diagram
HyperLink PDF Spec Sheet



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Thread Size #10-24 #10-32 1/4-20 5/16-18 3/8-16
Wing Dimensions
(Approximate) 		C-Spread 0.625 0.625 0.875 1.062 1.250
D-Thickness 0.062 0.062 0.093 0.109 0.125
E-Ht. Incl. Collar 0.437 0.437 0.500 0.625 0.750
Diameter - A 0.406 0.406 0.468 0.593 0.656
B-Thickness 0.062 0.062 0.078 0.093 0.125
Thread Size #10-24 #10-32 1/4-20 5/16-18 3/8-16
L
Length
Under
Collar 		1/4 ST 1504
1/2 ST 1508 ST 2108
5/8 ST 1610 ST 2110 ST 2710 ST 3310
3/4 ST 1512 ST 2112
1 ST 2716 ST 3316
1-1/4 ST 2720
1-1/2 ST 2124

part image

The ST thumbscrew is a rugged, one piece, cold forged screw with great strength. It has a broad wingspread for easy adjustment, it can even be adjusted with an adjustable wrench. The ST thumbscrew features a round collar for a stop and a full thread length for secure engagement.



Material and Thread Information
Material: C1010 High-Welding Quality, Low Carbon Steel
Finish: Plain, Unless Specified
Threads: Unified Standard Class 2A ASME B 1.1-2003