Buy Bleeder Screw, 3/8″ x 24 (J8129722)

The Bleeder Screw, 3/8″ x 24 (J8129722) is a small yet essential component in the brake

system of many Jeep and Chrysler vehicles. Designed as an OEM-style replacement part, this

screw plays a crucial role in maintaininghproper hydraulic pressure and ensuring safe,

responsive braking performance. It is widely used across multiple Jeep models, including

Wrangler (YJ and TJ), Cherokee (XJ), Grand Cherokeeh (ZJ and WJ), and Liberty (KJ) produced between the mid-1980s and mid-2000s.

This bleeder screw features a 3/8-inch diameter with a 24-thread pitch (3/8″-24) and

an overall length of approximately 1.125 inches (28.57 mm).These precise dimensions

ensure compatibility with factory brake calipers and wheel cylinders, allowing it to function as

a direct replacement without modification. It is typically sold individually, with one screw required per brake caliper or wheel cylinder

The primary function of the J8129722 bleeder screw is to allow air and old brake fluid to be

expelled from the brake lines during maintenance. When opened slightly, it provides a

controlled outlet for trapped air bubbles, which can otherwise reduce braking efficiency and

lead to a soft or spongy brake pedal. By enabling proper bleeding of the brake system, the screw helps restore firm pedal feel and consistent braking performance.

Constructed from durable metal, the bleeder screw is designed to withstand high pressure,

corrosion, and repeated use. Its tapered seat ensures a tight seal when closed, preventing

brake fluid leaks and maintaining system integrity. The hex head design allows for easy

operation with standard tools, making it convenient for both professional mechanics and DIY users.

Constructed from durable metal, the bleeder screw

Installation is straightforward and typically involves threading the screw into the brake

caliper or wheel cylinder and tightening it to the manufacturer’s specified torque. During

brake bleeding procedures, the screw is opened and closed in sequence to remove air from the

system. This process can usually be completed in under an hour with basic tools and proper technique.

Over time, bleeder screws may become clogged, corroded, or stripped due to exposure to

moisture and brake fluid. Common signs of wear include difficulty loosening the screw, fluid leaks, or ineffective brake bleeding. Replacing a worn screw with the J8129722 ensures reliable performance and prevents further brake system issues.

In summary, the J8129722 bleeder screw is a simple but vital component that supports effective brake maintenance, enhances safety, and ensures optimal braking performance across a wide range of Jeep vehicles.