Coiled helical springs may be cylindrical, conical or tapered; with variable pitch.
Wire Diameter: from 0.1 mm to 16 mm
Wire Shape: circular, square or rectangular section
Wire Materials include: patent carbon steels, stainless steel, alloys, pre-tempered and zinc-coated wire, bronze, beryllium copper etc.
Every design requirement can be met on request: springs can be galvanised, burnished, phosphor-coated, shot-peened, electro-polished, oiled, dehydrogenated etc.