Bo stitch BTFP72319 Industrial 1/4" Series Plug - 1/4" NTP Female Thread: features pre-applied thread sealant for airtight connections - this simplifies field installation by eliminating the need for thread sealant tape. Designed with corrosion resistant plated steel construction with drag guard for jobsite durability and reliability. The 6-ball coupler design is for balanced, strong, secure connections. This provides a quick, convenient and reliable way to change between air tools. The high flow, one hand push-to-connect eliminates time consuming screw fittings associated with tool changeovers.