MS90376-10RB is a part manufactured by Caplugs. It is a reversible, expanded polyethylene (EPE) sealing cap with a 10-32 thread size, ribbed body, and black color. It has a ribbed body designed for easy grip and removable installation, and the polyethylene material resists many corrosive and environmental hazards. The reusable cap can be paired with a variety of threads, including SAE, NPT, and BSP fittings, making it suitable for use in multiple applications.