M4 X 80 CSK REC HI-T SCREWS Y/P (100) is a high-tensile countersunk screw designed for structural integrity and reliability. Engineered for professional and industrial use, this fastener ensures secure fitting with a countersunk design for a flush finish. Yellow passivation enhances corrosion resistance, making it ideal for environments exposed to moisture and wear. Suitable for mechanical engineering, construction, and automotive applications.