Upgrade your battery connections to maximum durability and unyielding electrical reliability with the Yuasa 479699 12mm Large Stainless Steel Hex Bolt. Specifically engineered for heavy-duty Yuasa GYZ20H, GYZ20HL, and GYZ32HL series batteries, this premium hardware replacement is built to handle the intense electrical demands of large-displacement engines. Standard hardware can corrode or strip out under heavy torque, but this heavy-duty stainless steel hex bolt locks your main battery leads down tight to ensure uninterrupted current transfer every time you hit the ignition switch.