Milton 789 T style couplers have locking balls for better retention of a plug. Has a maximum of 300 PSI with a basic air flow of 1/4". These brass couplers have air flow of up to 40 SCFM and are complete with a Buna-N seal to prevent leaks.
The T-style from Milton is equal to the commonly known "Automotive" style hose fittings. Please note that 789 uses a 1/4" style body size which is the most common in the industry. The actual NPT thread size is 3/8" NPT male for connecting to larger air hoses.
1/4" Female Body 3/8" NPT(M) T-Style