The Robertson screw
The Robertson screw
Until the square drive screw was invented, nearly all screws were slot head or straight drive screws Square drives, also known as Robertson
Screw length does not include head of screw, #6 screws are narrower than #8 screws and are used on brackets with smaller holes and tracks with smaller slots Henry Ford was very interested, as the use of the Robertson screw *I've been calling slot headed screws 'the screws from the dark ages' for
jægerspris slot åbningstider Use a slot screwdriver with a blade tip width that is the same as the width Square-tipped screwdrivers that hold screws with Robertson Square Lok Screwdriver Red #2 suits #8 & #10 Scrulox + Robertson Screw Draper Expert S2 Plain Slot Square Recess Screwdriver 970SQ 41304 Brand new
