Crosshead Screwdrive... - 121 : Only A Slotted And A

: On equipment like the 6800 Series Single Column Table Model, page or section 121 details testing limit stops, a task requiring minimal tools to ensure the crosshead moves safely.

The phrase appears to be a direct instruction or requirement from a technical manual or assembly guide, likely for an Instron testing system. In such contexts, "121" often refers to a specific procedure or page, such as testing limit stops or general maintenance, where these two tools are the only ones required. The Two Essential Driving Tools 121 : Only a Slotted and a Crosshead Screwdrive...

: Many mass-produced items use these two drives for user-accessible parts, while reserving more complex drives like Torx or Hex for internal components to discourage unauthorized dismantling. Best Practices for the Task : On equipment like the 6800 Series Single

: Often called a standard or flat-blade screwdriver, it features a single chisel-shaped tip designed to fit into a straight slot on a screw head. It is the oldest and simplest type of screw drive. The Two Essential Driving Tools : Many mass-produced