| Listed in parts books | Not catalogued by year yet |
LOCK TAB PREUNIT
A pre-unit Triumph lock tab washer, PN 70-3119, used to keep a retaining nut from loosening.
This is a lock tab, part number 70-3119, listed in the catalog for pre-unit Triumph twins. A lock tab like this is a simple bent washer that keys against a flat or spline and folds up against a nut or bolt head to stop it from working loose under vibration.
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One of the catalog listings ties this tab to the engine sprocket area, which fits with how lock tabs are typically used on pre-unit motors - keeping a retaining nut from backing off where there's no other locking method.
We don't have much more detail on this one beyond that. If you're matching this up to a specific spot on your engine, give us a call and we'll help confirm before you order.
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