Pump actuator anti-rotation device

A tappet comprising:

• a contiguous body having an outer wall and a transverse web, the outer wall defining a recess in a cylindrically-shaped outer surface;
• a roller mounted to the body at a cam contacting end;
• a first means for maintaining alignment of a tappet;
• and, a second means for securing the first means to the contiguous body, the second means including first and second indentations forming staked portions into the outer wall of the contiguous body.

A method of manufacturing a tappet, comprising:

• forming a roller tappet body blank having a transverse web and outer wall;
• machining at least a portion of the tappet body blank to final dimensions;
• deforming the outer wall to form a recess;
• inserting an alignment member into the recess, the alignment member including a cylindrical member having first and second ends;
• staking the outer wall by forming indentations in the outer wall adjacent the alignment member and toward the respective first and second ends of the alignment member.