Socket Head Cap Screws 4x40mm (4) (DUB2282)

Socket head cap screws, sized 4x40mm, come in a four-pack and are designed for secure fastening in tight spaces. The recessed hex drive and smooth cylindrical head provide reliable torque in compact assemblies while maintaining a clean, low-profile appearance.

With a 4 mm diameter and 40 mm length, these screws are finished in black oxide for a durable, subdued finish that blends with darker hardware and helps components stay firmly attached in everyday hobby builds.