Stainless Steel Roofing Screws

At Sinsun, we stock all three grades, which customers often refer to as marine-grade Tek screws, rust-resistant self-tapping screws, or alloy roofing fasteners. It's not enough just to grab what's on the shelf-the right alloy depends on the application and environment.

So, how does Sinsun differ from bulk importers who only sell mysterious products? Our products are clearly labeled. We test every batch, and all three grades come equipped with the same adhesive EPDM washers and precision heat-treated drill bits. Many sellers treat 304 and 316 as interchangeable, but this is not the case: 316 commands a higher price because of its superior durability in salt spray environments; 410 is less expensive because it is magnetic and has higher hardness, but it cannot withstand long-term use in coastal environments. We label the exact grade on every box, so you never have to guess and you will never be disappointed. Simply select the grade you need, and we’ll ship the correct screws to you.

Whether you need small batches for a residential project or bulk orders for a large industrial job, Sinsun has you covered. We understand high-end projects demand high-quality fasteners, so we never cut corners. Contact our team now for a competitive quote—we’ll help you pick the right screws, deliver on time, and ensure your roof stays secure for decades. No rust, no leaks, just reliable performance you can trust.