Listed here are a set of 4 machined aluminum wheel nuts in the closed face design for the Lotus 49 to be used as dress up only. 

Photo - Steve Mohlenkamp, USA

The hex nut and washer are machined as one piece with a mounting pin on back. Simply remove unwanted detail currently on your wheel centers, drill shallow bore, and install. Hex size across flats is .153" (3.88mm). Washer diameter is .180" (4.57mm). Mounting pin is .054" (1.37mm).