The Adaptall Series 5307 Straight Female DIN Swivel x Male NPT hydraulic adapters, made from durable carbon steel, provide secure, leak-free connections for fluid and gas transfer in hydraulic systems. The female DIN swivel side is designed for metric-sized tubes, following the ISO 8434-1 / DIN 2353 standard, offering reliable and easy-to-install connections for various hydraulic applications. On the other side, the male NPT (National Pipe Taper) connection features tapered threads that rely on thread deformation to create a metal-to-metal seal, ideal for single assembly applications. The nominal pipe size can be determined by measuring the thread diameter and subtracting 1/4". NPT connections are not recommended for frequent disassembly, as wear can occur on the threads. These versatile adapters are perfect for professionals who need a durable, efficient solution combining the reliability of NPT connections with the flexibility of DIN tube fittings.