Shop for Air Compressors, Tools & Accessories at The Home Depot. The Hitachi 190241 Parker Style 3/8 in. NPT x 3/8 in. Automotive Swivel Plug is a 360-degree designed plug for pneumatic hose protection. Made of plated steel, this female 3/8 in. x 3/8 in. plug has a NPT (National Pipe Thread) thread. Hitachi Swivel Plugs protects your pneumatic hose from getting tangled during use which extends the life of your air hose x reducing side stress, twisting and kinks. Simply use a wrench to secure x tightening the squared sides on the plug to your main connector. Hitachi 190241 Parker Style 3/8 in. NPT x 3/8 in. Automotive Swivel Plug is warranted to the original purchaser to be free from defect in materials and workmanship for a period of 30-days from the original purchase date. Every Hitachi accessory is designed to the highest standards and is rigorously tested for both performance and durability. Since its inception, Hitachi has pioneered innovative technologies that have improved the quality of craftsmanship worldwide. Hitachi is a leader in power tool research and development and has achieved many firsts in the power tool industry. Today, Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality.