Hi Folks
Had a question on another E-list which prompted me to make this list of
threads. Thought it might be useful to others not on that list.
The 1/2" AF bolt should by rights have a 5/16" thread on it.
On the whole Triumph stuck to the system of into steel use UNF (fine) thread
form, into aluminium use UNC (coarse) thread form.
Common sizes on Triumphs
5/16 AF = 3/16 UNF or alternatively 2BA
3/8 AF = 3/16 UNF or alternatively 2BA
7/16 AF = 1/4 UNF or UNC
1/2 AF = 5/16 UNF or UNC
9/16 AF = 1/2 UNF or UNC
5/8 AF = 9/16 UNF (bolt often found with a 3/4 AF nut on)
3/4 AF = 5/8 UNF
Graham,
1967 1300 FWD
1968 2000 Saloon
1972 2.5PI Saloon
1974 Sprinted Dolomite 1850
1975 Toledo in restoration!
http://www.triumph-iw.co.uk
http://www.mickdolphin.co.uk Spares Supplier.
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