Actually, there is no 3/16 UNF thread, per se. It is actually a 10-32
thread. The coarse thread version is a 10-24 thread. Also, the 10-32
thread is not interchangeable with a 2BA thread. They differ as follows:
Major Diameter: 2BA -- 4.7 mm (0.185"), 10-32 -- 0.190"
Threads/inch: 2BA -- Approx 31.4 tpi, 10-32 -- 32
tpi
Thread form included angle: 2BA -- 47 1/2 deg, 10-32 --60
deg
As you can see, they are close, but they will jam, because of the difference
in included angle and the slight difference in pitch.
----- Original Message -----
From: "Graham Stretch" <technical@iwnet.screaming.net>
To: "2000 List" <2000-register@autox.team.net>; "Triumph List"
<triumphs@autox.team.net>
Sent: Thursday, April 05, 2001 1:46 PM
Subject: Bolts, comparison of head size to thread size.
> 5/16 AF = 3/16 UNF or alternatively 2BA
> 3/8 AF = 3/16 UNF or alternatively 2BA
///
/// triumphs@autox.team.net mailing list
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