Basically, it seals an opening in your air brake system. Think of it like a stopper for a hole. It’s threaded, so you screw it in tight to create an airtight seal. Sometimes these are used to cover ports that aren't currently being used, other times they’re there to allow access for bleeding the system or doing maintenance, and then get screwed back in tight afterward. It’s part of your air brake system, so specifically it keeps air pressure where it needs to be. The whole system relies on maintaining that pressure to properly activate your brakes. It's a small piece, but it's integrated into a bigger network of lines and valves. It’s usually found on things like air tanks, compressors, or control valves. Well, if it leaks, you lose air pressure. And losing air pressure in an air brake system isn’t something you want to mess with. It directly affects your stopping power. You’ll notice if one is leaking – you might hear a hissing sound, or the brakes might feel spongy or not hold as well. It acts like a shield, preventing air from escaping, and keeping everything working as it should. They're usually inexpensive, and a lot easier to replace than dealing with a brake failure, believe me. You can find these pretty easily, places like Fixparts Online have a good selection. It’s a preventative maintenance thing, really. Better than the rest: Screw Plug (MPN 8932800042) is backed by a 12-month warranty!

About Wabco

WABCO specializes in air braking systems, EBS, ABS, ADAS, and trailer control systems.

Why Choose Wabco?

• Wabco parts are known for lasting a long time, saving you money on repairs in the long run. • We have a huge selection of parts, so you’re likely to find exactly what you need for your vehicle. • Our parts meet or exceed industry standards, giving you peace of mind on the road. • Wabco has been a trusted name in auto parts for decades, with a reputation for quality and reliability. Drive with confidence – choose Wabco parts at FixParts Online.