Hi Richard, Mike
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.
----- Original Message -----
From: "Richard B Gosling" <Gosling_Richard_B@perkins.com>
To: "OC" <OC@46thFoot.com>; "spitfires" <spitfires@autox.team.net>
Sent: Thursday, April 05, 2001 9:42 AM
Subject: Re: 1500 Hard-top Questions
|
| Mike,
|
| The prices for the nuts and bolts are because the proper ones are vaguely
| decorative specials, since the heads are exposed in the cabin. The two
to the
| windscreen are dome-headed and coloured black, so they don't show up
obviously
| against the black top edge of the windscreen. The two at the back are
| dome-headed and chromed, so they look all pretty and shiny. All can be
easily
| replaced with perfectly ordinary 1/2" AF bolts (that's the head size, not
the
| thread size, I can never remember how they relate), if you are not
concerned
| with such detailed prettiness. |
| Richard & Daffy
|