The AndyMark Hex Molded Spacer 5mm Hex Bore, 0.125in. Length is an essential component for maintaining the stability of mechanical assemblies. Designed to fit common shaft types, this spacer is versatile enough for use with round shafts and bolts, particularly suitable for #10 hardware. Constructed from durable black polycarbonate, it offers resistance to stress cracking, making it a reliable choice for various applications. This spacer is ideal for projects requiring precision and durability in component spacing.