An easy and economical solution for satisfying the ABYC 7" circuit protection rule.Terminal Fuse Blocks mount on 3/8" (M10) battery post, battery switch and busbar terminals. Appropriate for DC Main, inverter, windlass, and bow thruster circuit protection, providing high current protection in tight spaces. Weatherproof and suitable for open-cockpit boats. Insulating nut and cap. M8 (5/16") terminal stud. Compact, Terminal Fuses are ignition protected and meet ABYC requirements for DC Main circuit protection on large battery banks. Clear window for visual indication of blown fuse and color-coded for each amperage. Terminal Fuses must be used with Terminal Fuse Blocks 5191 or 2151. SpecificationsApprovals: IP66 Dust tight, water protection from heavy seas or water projected from powerful jets, Meets SAE J1171 Marine ignition protectionMaximum Voltage: 58V DCInterrupt Capacity (The fault current that a device, normally a fuse or circuit breaker is capable of breaking without damage):10000A @ 14V DC,5000A @ 32V DC,2000A @ 58V DCHole Diameter: 5/16" (8.25mm)Weight:0.06lb (0.03 kg)Dimensional Drawing