About Fastenio

Fastenio is a stainless steel fastener supplier built for people who need the right hardware in the right quantity. Whether you are a contractor on a job site, a maintenance team restocking a parts room, or a procurement buyer sourcing in volume, we stock the sizes and materials you actually need.

We carry stainless steel bolts, nuts, washers, socket screws, and sheet metal screws in exact imperial sizes. Every product listing includes the thread size, material grade, finish, and pack quantity so you can buy with confidence. Small packs ship the same sizes as bulk orders — no minimum-case requirements.

What We Offer

• Exact sizes — shop by diameter, thread pitch, and length to find the precise fastener you need.
• Small packs and bulk orders — buy a single pack for a repair or order by the case for a project.
• Stainless steel focus — primarily 18-8 (304) stainless for corrosion resistance in outdoor, marine, and food-grade environments.
• Volume pricing — unit prices drop automatically at higher quantities.
• Technical specs — material, finish, grade, thread, and dimensional data on every product page.

Who We Serve

General contractors, electricians, plumbers, HVAC technicians, facility maintenance teams, marine outfitters, sign installers, fabrication shops, and procurement departments. If your work depends on reliable stainless steel fasteners, Fastenio is for you.