Shoulder bolts in a pack of 5 Main color: Silver, Black. Material: 40Cr Alloy Steel; Finish: Black Oxide; Weight: 131 g Hardness: HCR40-44; Head shape: Base Cap; Drive Type: Hex Socket; Strength Level: 12.9; Thread Cover: Partial Thread Shoulder diameter: 8 mm (0.31 in); Shoulder length: 50 mm (1.97 in); Thread size: M6; Thread length: 12 mm (0.47 in) Key benefits - Precise shoulder for alignment and bearing surfaces, enabling accurate positioning in assemblies. - Durable 40Cr alloy steel with black oxide finish for strength and corrosion resistance. - Hex socket drive and base cap head support secure, flush mounting with common tools. - Partial threaded portion provides a defined shoulder and controlled engagement. - Suitable for applications requiring a stable shoulder spacer with an M6 threaded end. Applications and use scenarios - Use in fixtures and jigs to ensure repeatable alignment of moving parts. - Mounting motors, servo actuators, or automation components that require a precise shoulder spacer. - Installation in sliding guides, pivot points, or hinge connections where a reliable shoulder diameter is needed.