Robertson Screw No 4 Full Flat Countersunk S/S - 75mm long
The Robertson Woodscrew has a square-shaped socket in the screw head and a square protrusion on the screwdriver. Both have a taper, which makes inserting the screwdriver easier, and also tends to help keep the screw on the screwdriver tip without the user needing to hold it there. Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. In industry, they speed up production and reduce product damage. This stainless steel screw (304) is 'threaded' right up to the head. The UK equivalent size would be 8 x 2 1/4 in. Sold as a packet of 200. For a Robertson screwdriver refer to 095.941 or 095.942, for a driver bit refer to 095.945
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