The square drive recess was the first recess-type drive developed for large scale screw production. Today, a century later, square drive screws and the driver bits are now widely available, economical and offer many advantages over other drive systems:
For higher torque applications:
The geometry of the square drive allows for the delivery of greater torque to the screw head by providing an improved contact area with the surface of a properly inserted driver bit. Consequently, the driver bit resists cam out. For this reason, the square drive is often preferred for applications where greater torque is required (eg. woodworking). Furthermore since the driver bit sits better in the square recess, there is also less slippage and reduced marring of the surface of the material into which the screw is being inserted.
For greater ease of use:
Since it is a square recess, there are four possible positions to insert the driver making it effectively self-aligning. Also because of the shape and depth of the recess, the screw remains on the driver bit making it ideal for use in tight spaces and for single hand insertion. For more information and technical specifications of the square drive recess (Robertson drive) click here
Over 30 complete lines of fasteners with square drives:
Aspen Fasteners offers many complete lines of screws (over 2000 parts) with square drives from stock in steel and stainless steel including:
24 hour delivery door-to-door service with UPS
Aspen Fasteners stocks full lines of square drive screws available for same day shipping from distribution centers across the USA. And remember, it’s always free shipping. Expedited next day delivery is also available for those rush requirements.
If you don’t see what you are looking for, please contact us and we’ll be happy to help you find what you need.