finishing SH Series Finishing Plugs for Socket Head Screws SH Series finishing plugs for socket head screws keep foreign matter out of screw head driving recess and counterbore. Ideal for sanitary equipment, screws that need periodic resetting, production and maintenance spray painting, and numerous other applications. Translucent polyethylene ensures visual identification of socket screws. Material: Low-Density Polyethylene Color: Natural THEY CAP...the top and the opening around the head of Allen type socket screws, including the recessed counterbore. THEY SEAL OUT...dirt, grease, paint, acids, abrasives and other contaminants. THEY PLUG...into the hex socket snugly and stay there until you remove them. RER Series Plugs for Rectangular Tubing RER Series plugs for rectangular tubing feature a series of externally tapered ribs designed to provide a sure grip inside a tube without unattractive plastic shavings. Durable construction ensures exceptional performance in business and commercial applications. * Broad selection of width to length proportions A Material: Low-Density Polyethylene Color: Black RER (50x100mm) 6-12 available in white. C B 150 * For other material and color options, contact customer service.