Engineering Nuts Bolts Screws Welding Symbols Drawing Drafting Template Mechanical Circle Screw Nuts Symbols Drawing Template Stencil Dimensions: 140 mm x 155 mm (5.5 The rate of transparency allows to see the drawing medium below template for easy positioning. This mechanical engineering stencil contains symbols of nuts, screw bolts, numbers, tolerance and welding symbols. High quality, brand new item supplied in original packaging.