Screw or Hinge cover with quick-release latch, Type 4X, able to withstand harsh environments, these small enclosures feature a simple, traditional non-metallic design that is suitable for a broad range of applications. Compression-molded fiberglass material has excellent temperature and chemical resistance qualities and exhibits outstanding physical properties. Fiberglass material is easily punched, drilled, filed or sawed. Seamless foam-in-place gasket assures water-tight and dust tight seal. Threaded internal bosses provided for mounting optional panels and terminal block kits. Scratch-resistant polycarbonate windows are permanently bonded in place. Enclosures with quick-release latches have corrosion-resistant polyester hinges and polyester latches with a type 316L stainless steel bail. Attached with type 316 stainless steel screws. A type 316L stainless steel padlock hasp is furnished with each enclosure. Sealing washers are furnished with enclosure. Fiberglass material is light-grey inside and out. Optional steel panels are painted white. Optional stainless steel, aluminium and composite panels are unpainted.