Many thanks!.. :-)
I just wanted to add, there is a BSF thread (5/16 x 22) on the brake master
cylinder rod too.. :-)
From: Curt/Nancy Arndt [mailto:firstname.lastname@example.org]
Sent: Sunday, August 08, 2010 11:42 PM
To: Tadeusz Malkiewicz
Subject: Re: [Healeys] nut type for Smiths heater assembly for BN2
As a rule of thumb, a BN1/2 will have three different and distinct thread
Whitworth, mostly BSF and one or two BSW applications, found in the engine,
transmission and suspension with changeover to UNF in some of the suspension
parts in later cars (BN2s.) Also some BSP (British Standard Pipe -
Parallel) applications in the engine.
Unified Threads and once again mostly UNF and I can't think of any UNC,
mostly in the body and chassis and all miscellaneous applications. UNF is
essentially the same as SAE Fine Threads and interchangeable. UNF/UNC
fasteners are marked to distinguish them from Whitworth Fasteners, and
BA (British Association) found primarily in the Smith's gauges, fuel
pumps/sending units, and wiper motors. Be careful however as No. 2BA is very
close to a standard UNF/SAE Fine 10/32 thread and a 10/32 nut will thread
onto 2BA stud or screw and vice versa. However a 10/32 screw will not
thread into a deep 2BA tapped hole.
And NO British Association is NOT a Whitworth Thread!!!
On Sat, Aug 7, 2010 at 12:03 PM, Tadeusz Malkiewicz
Anyone knows what is the thread type on the heater motor studs? It's
definitely not UNF/UNC..
I lost 2 nuts :-(
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