For Plastic Tubing View Specifications Male Pipe O.D. Tube ManufacturerPart # Add To Cart Brass Male Connector for Plastic Tube 1/8 1/4 68P-42 $1.90 Brass Male Connector for Plastic Tube 1/4 1/4 68P-44 $1.74 Brass Male Connector for Plastic Tube 3/8 1/4 68P-46 $2.47 Brass Male Connector for Plastic Tube 1/2 1/4 68P-48 $3.98 Brass Male Connector for Plastic Tube 1/8 5/16 68P-52 $2.81 Brass Male Connector for Plastic Tube 1/4 5/16 68P-54 $3.04 Brass Male Connector for Plastic Tube 3/8 5/16 68P-56 $4.45 Brass Male Connector for Plastic Tube 1/2 5/16 68P-58 $8.25 Brass Male Connector for Plastic Tube 1/8 3/8 68P-62 $2.50 Brass Male Connector for Plastic Tube 1/4 3/8 68P-64 $2.31 Brass Male Connector for Plastic Tube 3/8 3/8 68P-66 $2.98 Brass Male Connector for Plastic Tube 1/2 3/8 68P-68 $6.63 Brass Male Connector for Plastic Tube 1/4 1/2 68P-84 $4.55 Brass Male Connector for Plastic Tube 3/8 1/2 68P-86 $4.40 Brass Male Connector for Plastic Tube 1/2 1/2 68P-88 $4.79 Brass Male Connector for Plastic Tube 3/8 5/8 68P-106 $6.79 Brass Male Connector for Plastic Tube 1/2 5/8 68P-108 $6.79 Brass Male Connector for Plastic Tube 1/2 3/4 68P-128 $11.07 Brass Male Connector for Plastic Tube 3/4 3/8 68P-612 $6.89 Brass Male Connector for Plastic Tube 3/4 1/2 68P-812 $6.59 Brass Male Connector for Plastic Tube 3/4 5/8 68P-1012 $6.51