Enhance your fastening solutions with our Thumb Nut, designed for convenience and efficiency. Featuring a #4-40 thread size, it ensures a secure hold in place. The knurled design allows for easy grip and adjustment by hand, while the black color adds a sleek, professional look. Made of durable Nylon 6.6 material, it offers reliable performance in various applications. With an overall height of .28 inches and a .300 OD, it's suitable for a range of fastening needs. Rest assured, this Thumb Nut is RoHS compliant, meeting international standards for environmental responsibility. Upgrade your hardware with this essential component.