To elevate and locate a part against the pin

R4   standoffs are made of aluminum.

R20 standoffs are made of steel.

(see pricing and ordering at bottom of page)

M4 THREAD

PART #         THREAD    DIA.      HT    PIN DIA.  
R4-65-PSO       M4        6mm      5mm      2mm     
R4-610-PSO     M4        6mm     10mm     2mm  
R4-625-PSO     M4        6mm     25mm     2mm  
R4-95-PSO       M4        9mm       5mm     2mm  
R4-910-PSO     M4        9mm     10mm     2mm  
R4-925-PSO     M4        9mm     25mm     2mm  
R4-1210-PSO   M4      12mm     10mm     2mm  
R4-1225-PSO   M4      12mm     25mm     2mm

1/4"-20 THREAD   

PART #               THREAD  DIA.   HT    PIN DIA.       
R20-2525-PSO       1/4       .25"   .25"     .06"     
R20-2550-PSO       1/4       .25"   .50"     .06"    
R20-251-PSO         1/4       .25"   1.0"     .06"    
R20-37525-PSO     1/4     .375"   .25"     .06"    
R20-37550-PSO     1/4     .375"   .50"     .06"    
R20-3751-PSO       1/4     .375"   1.0"     .06" 
R20-5025-PSO       1/4       .50"   .25"     .06"