| Also known as | E4140 |
| Diagram | Fig. 2 — CRANKCASE · ref 25 |
| Subsystem | engine bottom |
| Listed in parts books | 1964–1968 |
Self-tapping screw
A self-tapping screw used in the crankcase area on Triumph engines, also listed as 71-7202/004 or E4140.
70-4140 is a self-tapping screw that turns up in the crankcase area on Triumph's parts diagrams. This is a small fastener, the kind used to secure a tag, plate, or light cover-type component into the case casting without needing a pre-cut internal thread on the other side.
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Our catalog record shows this one appearing across a run of crankcase listings from the mid-to-late 1960s, which tells us it's a recurring hardware item rather than a one-off oddball. It also carries an alternate part number form, 71-7202/004, along with the older E4140 designation, so if your parts book lists either of those you're looking at the same screw.
Beyond that, our record doesn't spell out exact thread size or length for this one. If you're replacing it, bring the old screw in or have your engine number handy and we can help confirm you're getting the right size before you order.
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