Primus India (Primus Fasteners India) is a Pune-based supplier of industrial fasteners for roofing, cladding and pre-engineered building (PEB) work. Its range covers valley fixing, crest fixing, stitching and heavy-duty fasteners, along with a group of specialised products built around particular sheeting and panel materials. This article looks at that specialised group: the Pro Bonded Washer Series OD-19, fiber cement fasteners, PUF panel fasteners, polycarbonate sheet faste