| Diagram | Fig. 6 — TIMING COVER, CONTACT BREAKER AND COILS · ref 32 |
| Subsystem | electrical |
| Listed in parts books | 1963–1972, 1974 |
Serrated washer (60-4256)
A serrated lock washer used across Triumph electrical mounting points, listed as 188330 and now supplied as 60-4256.
This is a serrated washer that shows up across a wide run of Triumph electrical fittings — mounting points for coils, horns, rectifiers, zener diodes, headlamp shells, and contact breaker assemblies. The serrations bite into the mating surface to keep a ground connection solid and stop the fastener from working loose under vibration, which matters plenty on electrical fittings where a loose ground means a flickering light or a bike that won't run right.
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In the parts books this one is listed under 188330 but the modern factory number is 60-4256 — if you're working from an older book and see 188330 called out, that's the same washer you'd order today as 60-4256. It turns up in a long list of figures spanning fenders, headlamp assemblies, and general electrical equipment plates, which tells you it's a general-purpose fastener washer rather than something built for one single bracket.
Given how many places this washer shows up in the catalog, it's worth keeping a couple on hand — small parts like this have a way of walking off the bench when you're in the middle of rewiring a headlamp shell or resetting points.
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