Profile: Alliance Express is a distributor of protection and finishing products. Our product lines include masking products, fasteners, finishing components, cable ties, & clips and hose protection products. Some of our fasteners are nylon screws, bolts & nuts, rivets, spacers, washers and bushings. The NCS series cap nut is a blind hex nut with an acorn-shaped top. It is made of nylon 6/6, and is resistant to corrosion, oil, abrasion & most chemicals. The RP push rivets are made of nylon 6 material. They require no tool for installation.