Description Additional Info Product Reviews Milton 1805BK 3/8" Female Coupler P-Style 3/8" FNPT P style couplers have 8 locking balls for better retention of plug. Has a maximum of 300 PSI with a basic air flow of 3/8". Heavy duty steel body has a Buna-N seal. Available air flow of 68 SCFM. UPC: 030937306562