This GMP Tools 4-lug Chicago fitting (part #34387, Millennium part #494417) is a direct replacement air connector for air compressors used in cable blowing and fiber optic cable placement equipment. The 4-lug design provides a secure, leak-resistant connection between air hoses and compressor outlets, helping maintain consistent air pressure during cable and duct blowing operations. Keeping a spare fitting like this on hand minimizes downtime when a worn or damaged connector needs quick replacement in the field. Millennium stocks this fitting along with related hose, blow gun, and adapter accessories -- contact our team to complete your cable blowing equipment kit.