Pair Of (2) XS Power 590 3/8" Battery Post Wing Nut Stud Adaptors

The 590 is a pair of stud adapters that converts M6 battery terminals to 3/8" studs with wing nuts. It handles two problems at once. First, thread size: heavy power cable for amplifiers, inverters, and winches is usually crimped with 3/8" ring terminals, and an M6 post will not take them, so these adapters make the terminal match the cable instead of the other way around. Second, access: wing nuts thread on and off by hand, so disconnecting for charging, winter storage, or a teardown between events does not mean finding a wrench and working blind next to a hot engine. Two adapters in the set cover the positive and negative terminals, keeping the hardware and the routine consistent on both sides of the battery. This is a good fit for 16V race batteries and power cells that ship with M6 terminals, big audio systems running large gauge cable, and any install where the battery comes out often enough that hand-tightened connections save real time.