McGuire Glossary of Fastener Terminology

N - 4 terms

NORYL(R) (PP3) (Plastics) - Modified polyphenylene ether is one of the more wildley known engineereing plastics and has gained UL and FDA approval for a broad spectrum of moldable and foamable grades. It has good impact strength at low temperatures and is resistant to many agents, including steam. It may be flurnished in either unreinforced grades and remains stable when processed. Yield stength or reinforced grades is comparable to aluminum. Typical end uses include computer and electric housings, automotive body parts, any piping.

NOSEPIECE - The structural member of the installation tool that supports the head of the fastener during installation. With the head being supported and an axial load applied to the threads, the counterbore is placed in compression causing it to yield and create the bulb. For spin-spin tools the nosepiece has radial serrations to prevent the insert from rotating relative to the tool. Spin-pull tools have smooth nosepieces. The nosepiece is sometimes referred to as an anvil.

NUTSERT® - Nutserts employs a different technology than other blind threaded inserts. A fracture point is designed into the insert causing the part to break into two separate parts when the installation load is applied. The exterior of the threaded portion has a taper which is forced into the counterbore causing it to expand radially against the wall of the mounting hole

NYLON - All grades posses toughness and resiliency and have a high fatique strength. Resistance to oils and hydrocarbon solvents is also good. Almost all formulations are also self-extinguishing and retain stable mechiancal properties at temperatures from -75F to above 225F. They are widely used for latches, cams, gears, and many other moving parts due to their excellent abrasion and impact resistance. Nylon is also available in a variety of cast forms and mobdylidenum disulphide filled grades (Nylatron(r) GS).