Abstract: A scraper-chain conveyor has channel sections or pans arranged end-to-end along which a scraper-chain assembly is circulated. Each pan is composed of side walls with a floor plate therebetween. Pockets are provided on the exterior of at least one of the side walls to accept and locate the heads of screw-threaded fixing components used to secure attachments to the side wall. The pockets take the form of shaped grooves each extending over substantially the entire height of the side wall. Each groove can receive a number of the heads, typically three, or fillers corresponding to these heads.