BS AU 50-2.3:1994

This standard BS AU 50-2.3:1994 Tyres and wheels. Wheels and rims is classified in these ICS categories:

• 43.040.50 Transmissions, suspensions
• 43.080.01 Commercial vehicles in general

This Section of BS AU 50-2 specifies dimensions and performance requirements for a range of sizes of wheel and hub nuts, bolts, and studs for road vehicles. The range of sizes covered is normally used on heavy commercial vehicles, but if used on other types of vehicle the requirements of this standard are still applicable.

This standard does not cover back-nuts which are used to secure certain types of stud to wheel-hubs but it does cover that part of the stud on which the back-nut fits.

The standard is applicable to fasteners for spigot-located wheels employing 18 mm, 20 mm, 22 mm, and 24 mm studs with hexagonal nuts fitted with flat-seating, captive washers (type A mounting), cone-fixings of 18 mm, 7/8 in British Standard Fine (BSF), and 1 in BSF sizes (type B mounting), and spherical-faced nuts for 18 mm, 20 mm and 22 mm sizes.

NOTE Mounting types A and B are defined in BS AU 50-2.2. BSF threads are specified in BS 84, which is obsolescent, and such threads should be used only for replacement components for existing vehicles. Spherical-faced nuts are specified in DIN 74361 and dimensional details are given in Annex A.

In addition to the definitive requirements, this standard also requires the items listed in 3.4 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied.

Dimensional, material and performance requirements.