TEKTON 9 mm Flat End Hex L-Key | KLX22090

TEKTON 9 mm Flat End Hex L-Key | KLX22090 Description

Tekton L-keys are made with 8660 nickel chromium molybdenum steel that's heat-treated to 54-58 HRC to produce tools that are hard but not brittle. As a result the maximum torque of the L-keys consistently exceeds the ASME standards for minimum torsion load and the ISO standards for minimum proof torque. The keys are coated with a durable manganese phosphate finish that's resistant to corrosion. We precisely manufacture our hex key geometry on the large end of the applicable range resulting in less slop in fasteners. The key tolerances are measured in two ways from point-to-point and side-to-side to ensure the highest standards of dimensional accuracy and consistency. With the exception of the smallest sizes Tekton L-key sizes are marked in two ways-both with a high-visibility laser marking and a stamped marking. Tekton keys also have slightly chamfered edges (except the sizes that are too small to be chamfered) and a smooth top face to optimize engagement with fasteners.