Drive Rivet - Traffic Safety Supply Company

3/8″ Drive rivet for square tube (square tube sold separately).  
3/8 Drive rivet for square tube (square tube sold separately).  

Drive Rivets - Save 10% Instantly

Posts and Hardware - Traffic Safety Supply Company

Nylon Drive Rivet products

RIDOT Office of Safety - Rhode Island Rhode Island Department of Transportation

Highway Specialties LLC

Home Department of Transportation

The Case for Daylighting, the Cheap Traffic Safety Fix That Cities Need - Bloomberg

This 3/8 diameter Jumbo Head Drive Rivet is the first rivet designed specifically for the traffic sign application. Installed with just a hammer it is

Jumbo Head Drive Rivet

Families flee brush fire

Standard Traffic Signs MUTCD Compliant - Traffic Safety Corp.