Fast Marina Magazine

Superformance Wheel PCD Guide

Presumably an American chart, with an interesting entry for the Marina

Manufacturer: Austin Healy
Model: Marina
Year: 73-date
Std. Wheel Size: 13x5
PCD: 4 on 3 3/4
Wheel Nut: 3/8 RH

Thought Marina had 7/16 wheel nut?

Nope 3/8" UNF except 10wt/575 commercial which is 7/16" UNF.

certainly are 3/8" UNF, its the same as mini