Monolithic Cast Nylon, also known asMC Nylon, with a structural formula of -{NH-(CH2)m}n-, where the value of M is typically 6-10, usually 6, hence commonly referred to as MC Nylon 6. The molecular weight of MC Nylon 6 is about twice that of regular Nylon 6, reaching 35,000-70,000. It boasts superior physical and mechanical properties over regular Nylon 6, with good strength, rigidity, toughness, wear resistance, and chemical stability; low water absorption rate, and excellent dimensional stability; self-extinguishing properties, and can maintain heat resistance up to 100°C continuously.

This material can be used directly for casting structural components or casting blanks that are then machined into finished products. It is now widely used to replace metals in the manufacturing of worm gears, worm shafts, bearings, gears, shaft sleeves, sliders, rollers, and more, and can also serve as a sealing material.