Wisco Products, Inc. Dayton, OH 45402. Manufacturer*, Custom Manufacturer. $5 - 9.9 Mil Revenue. Est. 1935. 10-49 Employees. Manufacturer of filler caps, necks, mountings & strainers for use with mining machinery. Steel & stainless steel caps are available with zinc clear & yellow plating, 16 ga., 18 ga. & 20 ga. steel or stainless steel covers ...