The Electro Hardware 11 mm Round Circuit Board Spacer for M4 Screws, Brass, Zinc-Plated, model MS1021M01F21F, is engineered to provide precise spacing and support in electronic assemblies. Designed for M4 screws, this spacer features an overall length of 11 mm, an inside diameter ranging from 4.2 to 4.8 mm, and an outside diameter of 6 mm. Constructed from high-quality brass and finished with a zinc plating, it offers enhanced durability and resistance to corrosion, ensuring long-term reliability in various applications. The spacer's design adheres to ASTM B633 and QQ-B-626 Comp 22 & Type 1 standards, reflecting Electro Hardware's commitment to quality and precision. This component is ideal for use in telecommunications, medical devices, military equipment, marine applications, automotive systems, aerospace projects, and more. Its precise dimensions and robust construction make it a valuable addition to any electronic assembly, providing the necessary support and spacing to maintain optimal performance and longevity of the components.