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Which Screw will work best for my work surface?

First and foremost we recommend you follow your fume hood or work surface manufacturers’ requirements.

Before starting always check below the surfaces you will be drilling into to check for wires, pipes, tubes, etc. that might be embedded or possible hanging below the surface.

It is up to the installer to determine the correct type of mounting screw to use for the surface you are mounting the supports too.  There are many types of materials, sheet metal, solid wood, plastic, etc.  If your surface is made from Wood, Plywood, Particle Board or Composite Materials, etc. a #8 or #10 Wood Screw would work. We recommend a pilot hole be drilled first.  For softer woods, use a 5/64” drill bit with a #8 screw or a 7/64” drill bit with a #10 screw. For harder woods increase drill bit size by 1/64”.

If your surface is made from Thin Sheet Metal or Soft Plastics, etc. a #8 or #10 Sheet Metal Screw would work. We recommend a pilot hole be drilled first, if using an #8 screw use a #29 (.136”) drill bit, or if you are using a #10 screw we recommend using a #21 (.159”) drill bit.

8-32 & 10-32 Machine screws are for use in thick metal or hard plastics, epoxy, etc. that have been drilled and tapped with the appropriate thread.  If you are using a #8 screw, use a  #29 (.136”) drill bit and use an 8-32 tap; If you are using a #10 screw use a #21 drill bit and use a 10-32 tap.

The #8 screws are for use with the Nylon Vertical Base Plates because of the countersunk head.

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