Veloci MTM 1/4 Stainless Steel Coupler x 3/8 NPT Stainless Steel Male Adapter This Fitting Normally Has A 1/4 NPT. This Fitting Is Modified With A 3/8 NPT End. The 3/8 NPT Threaded End Measures close to 5/8″ Quick Disconnect Coupler Socket 1/4 Quick Connect For Spray Tips Or Other Accessories . Top quality Ball bearing snap connection