By A Mystery Man Writer
These are wood screws with: a Round Washer Head (rounded top with built-in washer for larger bearing surface), the Original Robertson® square drive, a
Marathon Hardware Round Washer (Kreg) Screw
Robertson Drive Screws: Flathead, #8, 1 inch
8 X 1-1/2 Flat 4 Lug Robertson® 2/3 Aster Lo-Root®, Deck Screws, Yellow Zinc, 700pcs
The Book - Häfele
Wood screws - Paul Rocheleau Inc.
Screws & Bolts, Fasteners & Hardware, Business & Industrial - PicClick
Wood screws - Paul Rocheleau Inc.
Robertson is famous for the patent of the socket-head screw, widely known today as the square recess. The Robertson system perfectly mates the taper
Robertson Pan-Head Lo-Root Screws
Robertson Screw - The Original Robertson Drive
Robertson is famous for the patent of the socket-head screw, widely known today as the square recess. The Robertson system perfectly mates the taper
Robertson Pan-Head Lo-Root Screws
Lee Valley - Brassware 2016 PDF, PDF, Mail Order