Grade 316/A4 STAINLESS STEEL in 3/8BSF  (BRITISH STANDARD FNE ) thread, as used on many pre war and 1950s vehicles and machinery . MADE TO THE PRE WAR DEEP HD PATTERN :
Price is for 10 nuts .

Now extremely difficult to obtain in this quality, these have been specially produced in the UK and are the surplus from a special Vintage vehicle restorer order .
Surplus New/old stock from now closed Fastener Company (Stainlessparts) in perfect condition.