The AndyMark Hex Molded Spacer 5mm Hex Bore, 0.375in. Length is designed to ensure components remain securely in place, ideal for custom drivetrains or manipulators. This spacer features a 5mm hex bore, suitable for common shaft types, and is compatible with round shafts and bolts, particularly #10 hardware. Constructed from black polycarbonate, it offers durability and resistance to cracking, making it a reliable choice for various applications. This material is well-regarded for its toughness, familiar to many engineering teams.