The part number for 40mm conduit plug is
220S40.
Please go to the website via the following links below and check under the Documentation Tab for more information.
Australia - https://www.clipsal.com/products/detail?CatNo=220S40&itemno=220S40-GY&backto=/search?q=220S40&tab-document-1=0
New Zealand - https://www.pdl.co.nz/products/detail?CatNo=220S40&itemno=220S40-GY&backto=/search?q=220S40&tab-document-1=0