VW Torsion Arm & Beam Grub Screw – 111-411-151 The 111-411-151 is a high-tensile set screw (grub screw) that serves as a primary locking mechanism for the front suspension on nearly all air-cooled Volkswagens. While essential for early King Pin models, this hardware is equally critical for later Ball Joint and Super Beetle front ends. Its job is to lock the internal torsion leaf stacks into the center of the axle beam and to pinch the torsion arms onto the ends of those leaf stacks, ensuring the suspension height and tension remain constant. Each screw features a precision-tapered point designed to seat into the factory-machined "dimples" in the torsion leaf stacks. This creates a mechanical interference fit that prevents the arms from sliding off or the leaves from shifting laterally. Because these are located on the underside of the axle beam, they are frequently exposed to road debris and moisture. Replacing these screws during any suspension service is highly recommended to ensure you are working with clean threads and a sharp locking point. Detailed Vehicle Compatibility This part is a universal fit for the following models: VW Beetle (Standard): 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977 VW Thing: 1973, 1974 VW Karmann Ghia: 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974 VW Type 3: 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973 Product Highlights & Features Universal Application: Fits both King/Link Pin and Ball Joint front axle beams, as well as the center leaf-stack locks. Tapered Point Locking: Engineered to engage the leaf stack dimple perfectly, preventing any play or movement in the torsion assembly. High-Strength Steel: Built to handle the shearing forces of the suspension under load. OE Specification: Matches original VW dimensions (M14 x 1.5 thread) for a guaranteed fit in factory components. Technical Specifications Part Number: 111-411-151 Thread Pitch: M14 x 1.5 Material: Heat-Treated Steel Quantity: Sold Individually (6 typically required for a full front end) Installation & Maintenance Tips Seating the Point: When installing, ensure the screw "drops" into the leaf stack dimple. You can often feel this by wiggling the torsion arm slightly as you tighten the screw. Anti-Seize is Essential: Because these are prone to rusting in place, always apply a copper or nickel-based anti-seize to the threads before installation. Locking the Hardware: After the grub screw is tightened, you must install and tighten the Jam Nut (Part #N110603) against the arm or beam to prevent the screw from vibrating loose. Square Head vs. Hex: Depending on the manufacturer, these may come with a square head or an internal Allen (hex) drive. Ensure you have the correct tool to reach full torque without stripping the head. 111411151 98-4166-B
