Product overview 1-piece swivel castor with a 4' diameter wheel, an M12 thread for installation, a screw brake, and a double turn diameter of 100 mm. The wheel is medium white nylon, built for durability and reliable movement. Key benefits — why you need this castor Smooth, full swivel mobility: the 1-piece swivel design provides 360° rotation for easy directional changes, reducing effort when moving equipment. Precise control and safety: the integrated screw brake lets you lock the wheel quickly to prevent unwanted movement during loading or setup. Simple, fast installation: the M12 thread fits common M12-threaded sockets and mounts, making replacement or retrofitting straightforward. Predictable maneuvering in confined spaces: a double turn diameter of 100 mm keeps turning effort low and improves handling where space is limited. Durable, low-maintenance wheel: the medium white nylon construction resists wear and performs across a range of applications. Important attributes Function: swivel castor for mobile equipment, with a screw brake for locking. Compatibility: M12 threaded mounting for direct fit to M12 sockets or stems. Size: 4' wheel diameter; double turn diameter 100 mm for compact turning. Material: medium white nylon wheel for durability and consistent roll performance. Performance: designed for smooth movement and secure braking when needed. Typical applications Service carts and tool trolleys that require smooth rolling and the ability to lock wheels during use. Portable displays, fixtures, or equipment where quick installation with an M12 thread and controlled stopping are important. Workshops and light industrial furniture where durable nylon wheels and a compact turning circle reduce wear and improve handling. Quick specifications Type: 1-piece swivel castor Wheel diameter: 4' Wheel material: medium white nylon Brake: screw brake Thread: M12 Double turn diameter: 100 mm This castor provides straightforward installation, reliable rolling, and positive braking control for a wide range of mobile equipment needs.