https://www.vintagecarparts.co.uk/products/763en-end-ph-metal-conduit-end-plain-plated-nickel-20mm
763EN-END-PH: End connector for 20mm diameter conduit with plain hole for Classic & Vintage Cars |...
Two piece metal end connector for 20mm diameter conduit with plane hole at end. The two pieces sandwich a sheet metal aperture. Do not tighten ferule completely