Here is an original Meccano early 56T version of part 27a which was discontinued in the 1920's

Has a single tapped hole for a screw, included

This is the thinner version with riveted boss

Overall diameter approx. 40mm

To fit standard Meccano shaft, size 4mm

A used part which has age discolouration

We can combine postage if you are buying from more than one listing

Please add the item(s) to a basket and request an invoice

NB This listing has postage adjusted for multiples