Socket/thread sizes | Model Engineer : vimarsana.com

Have you mixed up some of these numbers?
It is a bi-hex socket in the list of their D19 sockets range. D19 14 means it is nominally 14mm across the flats of a hexagon and standard length. A D19L 14 would be a long reach version. The 14SAE is the designation of the across the flats size that will have some tolerance so that it slips on and off nuts and bolts easily.
29/32 (23.02mm) is close to 23mm and a 1/2 Whitworth wrench width is slightly over this 23mm figure at 0.929±.003 (23.6mm) so a 23mm socket is also a 29/32 socket and a 1/2 Whitworth socket as all have a very similar across the flats value.