TM 9-2320-302-34 0105 00-7 CAB BODY REPAIR - CONTINUED 0105 00 RIVET REPLACEMENT - CONTINUED Table 5. Calculating Correct Solid Rivet Length. 7. Rivet Driving Practices and Precautions. Riveting is the major means of joining body parts. Proper procedures must be followed to maintain high-quality workmanship. Table 6 lists types of faulty rivet installations, causes, and corrective action to be taken. Table 6. Correctly and Incorrectly Driven Rivet. RIVET DIAMETER MATERIAL THICKNESS ADD 1/4 in or less 2 in or less 1-1/2 x diameter of rivet 1/4 in or less over 2 in 1-1/2  x  diameter  of  rivet  +  1/16  in  for every 2 in of material thickness 5/16 in or more 1 in or less 1-1/2 x diameter of rivet 5/16 in or more over 1 in 1-1/2  x  diameter  of  rivet  +  1/16  in  for every 1 in of material thickness TOP VIEW IMPERFECTION CAUSE REMEDY ACTION None None None None Cut head Improperly held tools. Hold    riveting    tools    firmly against work. Replace rivet. Excessive flat head, resultant head cracks Excessive  driving,  too  much pressure on bucking bar. Improve riveting technique. Replace rivet. (A) DRIVEN CORRECTLY (B) UNSTEADY TOOL (C) DRIVEN EXCESSIVELY (D) SEPARATION OF SHEETS (E) UNSTEADY RIVET SET (F) EXCESSIVE SHANK LENGTH DAMAGED HEAD CRACKS SWELLED SHANK SLOPING HEAD BUCKLED SHANK BOTTOM VIEW