STZ Industries 308U38X12 Nipple 3/8" MIP each X 3/8" D MIP Black Steel 12" L STZ nipples are the way to go when selecting gas pipe for your residence. Our durable, schedule 40 black steel is hydrostatically tested. Pipe, fittings and nipples are availble in an array of sizes to fit residential and light commercial gas, LP and air applications. STZ nipples are the way to go when selecting gas pipe for your residence. Our durable, schedule 40 black steel is hydrostatically tested. Pipe, fittings and nipples are availble in an array of sizes to fit residential and light commercial gas, LP and air applications. Not for use with potable drinking water Rated at maximum 203 psi at 400oF 100% tested at the factory Durable steel construction Use for above ground gas, LP and air applications Always check your local plumbing and gas codes before starting any piping projects Meets ASTM standards Not for underground use B K/Mueller boasts an extensive line of black and steel nipples. Galvanized items are coated for water applications and meet low lead requirements. Malleable Galvanized Iron Pipe Nipple B K Malleable Black Iron Pipe Nipple. End 1 Diameter: 3/8 in. Finish: Black Material: Steel Length: 12 in. Product Type: Nipple End 1 Type: MIP each End 2 Diameter: 3/8 in. Maximum Pressure: 203 psi Maximum Temperature: 400 F End 2 Type: MIP Brand Name: STZ Industries Average Lead Content: Lead-Free