Especially useful in metal-to-metal or where heavy duty fastening is required. Machine screws are used in fastening nearly all types of hard materials.1/4"-20 x 2 in Phillips Flat Machine Screw, Zinc Plated Steel, 18 PK Commonly used with flat or lockwashers..
An O-ring is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a disc-shaped cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface..
Use on both porous and non-porous surfaces, such as ceramics, wood, glass, coated paper, rubber, plastic, textiles, metal and more.. MARKING HOLDER, YELLOW Versatile wax-based marking pencil for smooth, legible writing on a variety of surfaces. Works great on dark and transparent surfaces.