| Also known as | E3204 |
| Diagram | Fig. 6 — TIMING COVER, CONTACT BREAKER AND COILS · ref 10 |
| Subsystem | gearbox |
| Listed in parts books | 1963–1968 |
Screw (1 in. U.H.)
A 1 in. U.H. case screw used across multiple Triumph cover and case joints, including gearbox and timing cover areas.
This is a 1 in. U.H. case screw, part number 70-3204, also seen in older parts books under 9998-411 and E3204. It's a general-purpose fastener that Triumph used across a wide range of case and cover joints - the catalog record shows it turning up in the timing cover and contact breaker area, both gearbox inner and outer covers, the chaincase, the crankcase, and the gearbox shaft and bearing assemblies.
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Because it shows up in so many figures, this isn't a screw tied to one single job - it's one of the common case screws Triumph used wherever a cover needed a 1 inch screw with this thread. If you're missing one or a few out of a cover, this is worth checking against what's already in the case before you order, since cover screws in different spots aren't always identical length even when they look alike.
Catalog appearances run from 1963 into 1968, which tells you this screw was in wide use across those model years, though our records don't tie it to one specific machine. If you're not sure which screw you're chasing down, bring in the cover or give us a call and we'll match it up.
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