The 1/4" Drive Spline Socket, 40aSP SP 9, Size 9/32 is designed for external Spline-Drive screws, ensuring precise engagement and secure operation. It features a 1/4" internal square drive for compatibility with standard drive tools. Manufactured from HPQ® high performance steel and finished with a chrome-plated surface, it offers durability and corrosion resistance The socket conforms to MS-33787 / MIL-W-8982 standards, meeting specified technical requirements.