Need a specific bolt for your alternator? This Dorman 72078 is it. It's a 3/8-16 thread, 6 inches long, with a 9/16 inch hex head. Sounds simple, but it's made to be a direct replacement for the OEM part, so it should fit right where the old one came out. Dorman makes these with durable materials and they're built to specific thread tolerance standards – no wonky threads here. They even corrosion-test them with salt spray to make sure they won't rust out on you quickly. It's not just for cars either; you could use it for all sorts of stuff around the house or shop if you need a sturdy bolt. Backed by Dorman's team of engineers and their ASE Blue Seal Certified tech support if you have questions. Oh, and it comes with a limited lifetime warranty. Basically, it's a reliable, no-hassle hardware piece from a brand that focuses on making replacement parts that work.