U-bolts can be made up of all kinds of materials. But they’re usually made of durable metal that is noncorrosive. Here are some common materials at the heart of U-bolts:
Plain carbon steel, 304 stainless steel, 316 stainless steel
On top of these common core elements, manufacturers can add protective coatings. These finishes protect against corrosion even more. Here are some common coatings for U-bolts:
Zinc Plating
Zinc plating is where zinc is added using a layer of electricity. It’s usually a thinner layer that works better for indoor applications.
Hot-Dip Galvanization
Hot-dip galvanization adds zinc, but it’s a deeper coating. Manufacturers dunk the bolt in molten zinc to form a bond, which makes the coating especially well-suited for corrosive environments such as areas with high humidity or salt in the air.
Fluoropolymer (Xylan, Teflon, or PTFE) Coating
A fluoropolymer coating is a mixture of elements that are resistant to corrosion. The coating can hold up in extreme hot and cold temperatures without cracking.
Thermoplastic Coating
The first benefit of adding a thermoplastic coating to U-bolts is the added buffer between metals. Metal-on-metal contact can lead to galvanic corrosion and broken structures. A thermoplastic coating adds a protective neutral layer between the pipe and the restraint.
The coating also has a low coefficient of friction, which means it lets piping glide through the U-bolt, while cradling the pipe at the same time. This reduces the risk of broken pipes, restraints, or support structures.
1.Better thread engagement enables your car to withstand the rigors of your daily on-road drive.
2.Our Wheel bolt meets or exceeds the highest OEM proof load standards.
3.Thread size is stamped on every lug bolt for easy identification
4.Direct replacement – these wheel hub bolts match the fit and function of the original bolts on specific vehicle applications
5.Durable design – constructed of resilient and corrosion-resistant steel
6.Position specific – made precisely to securely mount the hub assembly to the wheel
U-bolts can work as a tube or pipe restraint. That means they keep piping from moving, banging into other structures, and wearing down.
However, restraining pipes is about more than pinning them down. In some cases, simply holding down piping can lead to corrosion at the point where pressure is most focused. When used as a guide instead, the U-bolt controls movement without pressing vibrations into a concentrated point. This means pipes can move axially, or through the pipe restraint, but won’t bounce up and down.
Model |
U bolts-Steyr |
OEM |
Steyr |
SIZE |
24x93x440-680length |
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