ST Thumb Screw



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
A-Diameter 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

Length
Under
Collar

L

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    

 

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:

C1010 High-Welding  

Tensile Strength:

60,000 psi
Quality, Low Carbon Steel  

Yield Point:

30,000 psi
Finish: Plain, Unless Specified  

Shear Strength:

30,000 psi

Threads:

Unified Standard Class 2A  

Elongation 2”

30% Max.
ANSI / ASME B 1.1-1989