Lug nut

Lug nut

A lug nut is a fastener, specifically a nut, used to secure a wheel on a vehicle. Typically, lug nuts are found on automobiles, trucks (lorries), and other large vehicles utilizing rubber tires. This is because tires must be changed, because the rubber on the surface of the tire slowly rubs off onto the road.

Design

A lug nut can be described as being a nut with one rounded or conical (tapered) end, used on steel and most aluminum style wheels. A set of lug nuts are typically used to secure a wheel to threaded wheel studs and thereby to a vehicle's axles. Some designs use lug bolts instead of nuts, which screw into a tapped (threaded) hole. This configuration is commonly known as a bolted joint. The lug's taper is normally 60 degrees (although 45 is common for wheels designed for racing applications), and is designed to center the wheel accurately on the axle, and to reduce the tendency for the nut to loosen, due to fretting induced precession, as the car is driven. Honda uses a spherical rather than a tapered seat, but the nut performs the same function. Older style mag wheels have a 1/2 to 1 inch shank slipping into the wheel to center it and a washer that applies pressure to clamp the wheel to the axle.

Removing and replacing lug nuts

Basic tools needed to remove/replace lug nuts include a lug wrench, an automotive jack, and a screwdriver. [cite web
publisher = NSX Prime
url =http://www.nsxprime.com/FAQ/DIY/remove_wheels/removing_the_wheels.htm
title = Removing and Installing Wheels
date = 1997
accessdate = October 4
accessyear = 2007]

History

Some cars made up to about 1960 used left-hand and right-hand threaded lug nuts for different sides of the vehicle to prevent loosening, until it was realised that the taper seat performed the same function. In order to allow the easy detection of loose lug nuts, some large vehicles are fitted with loose wheel nut indicators, which spin with the nut and highlight misaligned nuts.

References


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Look at other dictionaries:

  • Lug nut — Lug Lug (l[u^]g), n. [Sw. lugg the forelock.] 1. The ear, or its lobe. [Scot. & Prov. Eng.] [1913 Webster] 2. That which projects like an ear, esp. that by which anything is supported, carried, or grasped, or to which a support is fastened; an… …   The Collaborative International Dictionary of English

  • lug nut — lug′ nut n. aum a large nut fitting on a heavy bolt, used esp. in attaching a wheel to a motor vehicle …   From formal English to slang

  • lug nut — One of several nuts which hold the wheel and tire assembly on the car and are screwed on the studs. The inner face of the lug nut is a tapered (conical) nut to help center the wheel. On modern wheels for passenger cars, lug nuts and corresponding …   Dictionary of automotive terms

  • lug nut — a large nut fitting on a heavy bolt, used esp. in attaching a wheel to a motor vehicle. * * * n. a large rounded nut that fits over a heavy bolt, used esp. to attach the wheel of a vehicle to its axle * * * noun, pl ⋯ nuts [count] US : a heavy… …   Useful english dictionary

  • lug nut — noun see lug III …   New Collegiate Dictionary

  • lug nut — a large nut fitting on a heavy bolt, used esp. in attaching a wheel to a motor vehicle. * * * …   Universalium

  • lug nut — noun A strong nut used to attach a wheel to an axle of a motor car …   Wiktionary

  • locking lug nut —   n.    a lug nut which requires the use of a key or special wrench …   Locksmith dictionary

  • locking lug nut — An anti theft wheel lug nut which requires a special wrench to remove it …   Dictionary of automotive terms

  • Lug — (l[u^]g), n. [Sw. lugg the forelock.] 1. The ear, or its lobe. [Scot. & Prov. Eng.] [1913 Webster] 2. That which projects like an ear, esp. that by which anything is supported, carried, or grasped, or to which a support is fastened; an ear; as,… …   The Collaborative International Dictionary of English

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