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Glossary of Terms

CATEGORY TERM DEFINITION Brand Name - FastenerRivnut®A Bollhoff brand name for an internally threaded tubular fastener. Brand Name - FastenerPlusnut®A Bollhoff brand name for an internally threaded tubular fastener with slotted shanks that provide a wide footprint when upset. Brand Name - FastenerRivstud®A Bollhoff brand name for an internally threaded tubular fastener with a factory inserted stud. Brand Name - FastenerUnilock®A Bollhoff brand name for an internally threaded tubular fastener with a keyed under head protrusion and an end of shaft crimp to enhane torque rsistance. This fastener meets MILN 25027 thread locking requirements. Fastener Term - RivnutGrip RangeThe area between the maximum and the minimum zone of thickness that is best suited for the installation of a specific Rivet Nut fastener. Fastener Term - RivnutMaximum GripThe maximum thickness of material in which a specific Rivet Nutt can be installed. Fastener Term - RivnutMinimum GripThe minimum thickness of material in which a specific Rivet Nut can be installed. Fastener Term - RivnutTorqueA measure of the tendency of the force to rotate the body upon which it acts about an axis (twist). Torque is measured in inch or foot pounds. Fastener Term - RivnutUltimate Shear StrengthThe amount of force in pounds it takes to horizontally break a Rivet Nut after upset by pulling across the shank of the Rivet Nut. Fastener Term - RivnutUltimate Tensil StrengthThe amount of force in pounds it takes to vertically break a Rivet Nut after upset by pulling on the head and the bulge of the Rivet Nut. Fastener Term - RivnutUltimate Thread StrengthThe amount of force in pounds it takes after upset to strip out the Rivet Nut threads. Fastener Term - RivnutUpsetA term used to describe the installation of a rivnut or rivet nut. Fastener Term - RivnutUpset LoadThe amount of force in pounds it takes to upset a rivnut during installation. Fastener Term - RivnutPull-Up StudThe part of an installation tool that threads in to the rivnut during installation. Fastener Term - RivnutAnvilThe part of an installation tool that holds the pull up stud. Fastener Term - RivnutRivnutThe Rivnut is an internally threaded, tubular blind fastener. It performs as a rivet to fasten two or more materials together. It performs as a nut for the attachment of a mating part with a screw. Also known as a Rivet Nut. Fastener Term - RivnutRivet NutThe rivet nut is an internally threaded, tubular blind fastener. It performs as a rivet to fasten two or more materials together. It performs as a nut for the attachment of a mating part with a screw. Fastener Term - RivnutPlusnutAn internally threaded tubular fastener with slotted shanks that provide a wide footprint when upset. Designed to fasten thin metal, plastic or fiberglass material. Fastener Term - RivnutHexnutThe Hexnut is a flat-head, internally threaded, hexagonal blind fastener. The hexagonal shank is designed to increase resistance to torque related spin out and vibration Fastener Term - RivnutThin WallA Rivet Nut designed to be a lower cost alternative for applications with reduced load requirements. Fastener Term - RivnutOpen EndA Rivet Nut with a shank end that is not closed off. The open end feature is standard. Fastener Term - RivnutClosed EndA Rivet Nut with a shank end that is closed off. The closed end feature is designed to seal the threads. Fastener Term - RivnutTeardropA Rivet Nut with a teardrop shaped head designed to enhance torque resistance without the need for special hole preparationt required with the keyed rivnut. Fastener Term - RivnutKeyedA Rivet Nut with a small protrusion called a key under the head extending from the shank. The key fits in to a mating slot in the installation hole. The key-slot design enhances torque resistance. Fastener Term - RivnutFillister HeadA Rivet Nut designed with a thicker head for use where a standoff or spacer is required. Fastener Term - RivnutRibbedA Rivet Nut with vertical grooves on the upper potion of the shank to enhance torque resistance Fastener Term - Self-Locking NutSelf-Locking NutA self-locking nut is a nut that resists loosening under vibrations and torque. It uses a deformed elliptical or out of round upper section of thread that tightly binds with the bolt threads and keeps the nut from loosening from vibration or rotation of t Fastener Term - Self-Locking NutAnchor NutAn anchor nut (also called a nut plate) is a self-locking nut that is used in blind applications where access to one side of the application material is limited. Anchor nuts have either one or two lugs projecting from the base of the threaded body. The nuts are attached by riveting or welding the lugs to the work surface. A nut in the form of a tapped insert forced under steady pressure into a hole in sheet metal. Fastener Term - Self-Locking NutWrench NutA wrench nut is a self-locking nut that needs access to both sides of the material for installation. It is a short metal block having a central threaded hole which receives a bolt, screw, or other threaded part. Wrench nuts typically have a hexagonal or double hexagonal shape. A wrench is used to tighten or loosen the wrench nut. Fastener Term - Self-Locking NutGang ChannelA series of self-locking nuts assembled on a retainer or track. The track can be straight, curved or oval in shape. The length of the track and spacing of the nuts vary. The hole-drilling and riveting arrangement enables faster assembly and disassembly and reduces installation time. Fastener Term - Self-Locking NutCRESCRES stands for Corrosion RESistant steel. A286 stainless steel is the most common type of corrosion resitant steel used for self-locking nuts. Fastener Term - Self-Locking NutA286A286 is a hardened corrosion resistant stainless steel designed for use at temperatures up to 1300°F. It has high tensile strength and good corrosion resistance. Fastener Term - Self-Locking NutCarbon SteelCarbon steel is a metal alloy that is formed as a result of combining iron and carbon. Manufacturers add carbon to iron to solidify the structures in it and strengthen the resulting metal. Fastener Term - Self-Locking NutAlloy SteelAlloy Steel is the standard term referring to steels made with other alloying elements added deliberately in addition to the carbon to alter its properties. Common alloyants include manganese (the most common one), nickel, chromium, molybdenum, vanadium, silicon, and boron. Less common alloyants include aluminum, cobalt, copper, cerium, niobium, titanium, tungsten, tin, zinc, lead, and zirconium. Fastener Term - Self-Locking NutInconelInconel is a family of nickel-chromium-based super alloys. The name is a trademark of Special Metals Corporation, a wholly owned subsidiary of Precision Castparts Corp. Inconel alloys are oxidation and corrosion resistant materials well suited for service in extreme environments subjected to pressure and heat. Fastener Term - Self-Locking NutWaspaloyWaspaloy is a registered trademark of United Technologies Corp that refers to an hardened, nickel-based super alloy. Waspaloy alloy is typically used in high temperature applications up to 1800 degrees F (980 degrees C). Waspaloy also has a good resistance to corrosion and oxidation which makes it well suited for operation in extreme environments. Fastener Term - Self-Locking NutPassivationPassivation is the process of treating or coating a metal in order to reduce the chemical reactivity of its surface. In stainless steel, passivation means removing the free iron from the surface of the metal using an acid solution to prevent rust. The passivation process can also use a light coat of a protective material, such as metal oxide, to create a shell against corrosion. Fastener Term - Self-Locking Nut2 Lug Anchor NutAn Anchor Nut with two lugs projecting from either side of the base of its threaded body. Each lug has one hole in it for riveting the anchor nut to the application material. The lugs can also be used to weld the anchor nut to the application material. Fastener Term - Self-Locking Nut1 Lug Anchor NutAn Anchor Nut with one lug projecting from one side of the base of its threaded body. The lug has two holes in it for riveting the anchor nut to the application material. The lug can also be used to weld the anchor nut to the application material. Fastener Term - Self-Locking NutShort Lug Anchor NutAn Anchor Nut with two lugs that are shorter than normal and used in applications with tight space requirements. Fastener Term - Self-Locking NutRight Angle Anchor NutAn Anchor Nut where the threaded nut body is positioned at a right angle to its single lug. Fastener Term - Self-Locking NutCorner Anchor NutA corner anchor nut has two lugs projecting from the threaded base at a 90 degree angle. Fastener Term - Self-Locking NutMiniature Anchor NutAn Anchor Nut with smaller physical dimensions than a typical anchor nut for close clearance applications. Fastener Term - Self-Locking NutFloating Anchor NutAn Anchor Nut that is designed with a floating nut assemble that allows for radial movement of the nut . This feature allows for some bolt hole misalignment during assembly. The nut can move slightly which enlarges the positioning tolerances of the mounted parts. Fastener Term - Self-Locking NutFixed Anchor NutAn anchor nut the is designed to give little or no movement of the nut body. This type of nut is used in applications where no misalignment is tolerated. Fastener Term - Self-Locking NutDeep CounterboreA type of self-locking nut that is shaped to fit in to a counterbored hole. A counterbore hole is a cylindrical flat-bottomed hole that enlarges a smaller coaxial hole. A counterbore hole is typically used when a fastener is required to sit flush with or below the installation material's surface. Variable-depth counterbore nuts permit use of constant bolt lengths to fasten panels of various thicknesses. Fastener Term - Self-Locking NutCountersunk BodyAnchor Nuts with a countersunk body design allow for flush mounting of the bolt or screw head. Fastener Term - Self-Locking Nut160,000 PSIAn anchor nut designed with an axial tensile strength of 160,000 PSI. Typical anchor nuts are rated at 125,000 PSI. Some special self-locking nuts are designed with an axial tensile strength of 180,000 PSI. Fastener Term - Self-Locking NutSelf AligningA self-aligning Anchor Nut is a type of nut that is used in applications where the fastener is not perpendicular to the surface the nut lugs. This action is achieved by using a flanged nut inside a specially shaped dished-out washer. They are commonly used in the aerospace industry. Fastener Term - Self-Locking NutSelf SealingAn Anchor Nut designed for applications that need to be sealed against water, oils, and other liquids. Fastener Term - Self-Locking NutSpring LoadedA variation of a floating Anchor Nut that includes a spring between the basket and channel. Fastener Term - Self-Locking NutSilicon RubberSilicone rubber is an elastomer material that is composed of silicone, carbon, hydrogen, and oxygen. Silicone rubber is generally non-reactive, stable, and resistant to extreme environments and temperatures while still maintaining its useful properties. Fastener Term - Self-Locking NutFlourosiliconeA type of rubber that combines the good high and low temperature stability of Silicones with the fuel, oil, and solvent resistance of Fluorocarbons. Fluorosilicone is often used in aerospace applications for systems requiring fuel resistance up to 400 degrees F. Fastener Term - Self-Locking NutReplaceable NutAn Anchor Nut with a floating, replaceable nut element assembly. The nut element can be removed and replaced without disturbing the permanently attached retainer. These type of nuts are often specified for applications that usually require repeated use. Fastener Term - Self-Locking NutCountersunk Rivet HoleA 100 degree countersunk design of the bottom rivet hole on the anchor nut lug provides a flush installation of the rivet with the surface of the anchor nut lug. Fastener Term - Self-Locking NutProjection Weld NibsA projection on an anchor nut lug that enables the nut to be welded to the material. Welding of anchor nuts is used to minimize holes and stress on the installation material surface. Standards - FastenersNASNAS is an acronym for the National Aerospace Standard. The National Aerospace Standard has produced products that go through the most rigorous manufacturing process and iclude high strength, precison fasteners. Standards - FastenersMSMS is an acronym for the Military Standard of hardware classification and part numbering systems. Standards - Rivet NutsNAS1329The aerospace standard for the standard round body, flat head Rivet Nut. Standards - Rivet NutsNAS1330The aerospace standard for the standard, round body, countersunk head Rivet Nut. Standards - Rivet NutsMS27130The military standard for the standard, round body, flat head Rivet Nut.