50mm Metal Ball Castor - Select Attachment Fitting

Features A corrosion-resistant furniture castor made from durable and robust zinc alloy metal. Correct configuration of left and right wheels creates a straight tracking unit, combined with 360-degree swivel functionality for precise manoeuvrability in any direction. Ideal for adding mobility to trolleys and storage units. Select any attachment from our full range of fittings to best suit your furniture or equipment: (To select fitting above, first click on the Size/Type of fitting you require, then, using the OPTION dropdown box, select either left or right). Refer to the associated image for the correct configuration of left and right hand wheels.  Square Base Plate: suited to furniture and equipment with a thin mounting surface with insufficient depth for a castor and stem system to fit. Push-in Stem | Grip Neck: for furniture with tube or pipe legs or furniture legs and frames with minimal mounting space and a thick timber base to secure the socket connection. Threaded Stem: Available in 3 different thread measurements, providing a secure attachment to a thick timber base. A key benefit of the threaded castor fitting is that removing and replacing castors is easy if necessary. Imperial 3/8 BSW Thread: Screws into a matching 3/8 new or existing insert nut, tee nut or rivet nut of the same 3/8 thread size.  Imperial 5/16 BSW Thread: Screws into a matching 5/16 new or existing insert nut, tee nut and rivet nut of the same 5/16 thread size. Metric M8 Thread: Screws into a matching M8 new or existing insert nut, tee nut and rivet nut of the same M8 thread size.  UNF Thread (for Expanding sockets): For tube furniture legs or frames with expanding socket fittings. The beauty of an expanding socket fitting is its ability to work with a range of tube dimensions, so you don't need to search for an exact match. The expanding socket is sold separately or as a castor and socket set, which can be found under the 'ASSOCIATED ITEMS' Tab. All castors are also available with connecting sockets, nuts or screws - refer to the 'associated items' tab.