3/4" MPT Brass Hex Nipple 306-12 PHN 12 (10 Pack) - Heavy Duty Plumbing Fittings for Water, Gas & HVAC Systems

3/8" MPT x 1/4" MPT Brass Reducing Hex Nipple Fitting - 306R64 PHN64 (50/500 Pack) - Perfect for Plumbing, HVAC, and Industrial Pipe Connections

3/8" MPT Brass Hex Nipple - 306-6 PHN 6 (50/500 Pack) - Perfect for Plumbing, Gas Lines, and Hydraulic Systems