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For all your Michigan and Ohio construction projects

GSC, Ryan, and ASI

Premier Fastener Suppliers in MI and OH

Construction professionals in Michigan and northwest Ohio have known for decades – for the best inventory of screws, nails, Tapcons® and other reliable fasteners in the Great Lakes region, there are three great options:

Gypsum Supply Company (GSC) – serves residential and commercial construction customers through its yards throughout Michigan (Ann Arbor, Byron Center, Kalamazoo, Lansing, Traverse City, and Zeeland), and northwest Ohio (Holland).

Ryan Building Materials (Ryan) – serves commercial and residential builders through its yards across eastern central Michigan (Harrison Township, Southfield, Troy).

ASI Building Products (ASI) – serves construction professionals and homeowners through its yards across southeast Michigan (Bridgeport, Detroit, Southfield).

As fellow members of the GMS family of companies, unified in a commitment to exceptional customer service, the combined resources of GSC, Ryan, and ASI offer a broad assortment of building materials.

Michigan’s Finest Fastener Selection

Our extensive fastener selection contains innovative solutions for all types of construction applications, and products in a variety of sizes and lengths.

Drywall Screws

For a stronger hold than nails, choose drywall screws for your Great Lakes construction projects. We sell multiple types and sizes, for a variety of applications, including:

  • Drywall to metal
  • Drywall to wood
  • Interior drywall to drywall
  • Interior drywall to wood
  • Exterior drywall to wood

Wood Screws

Our framing screws come in a variety of heads (Phillips, square, bugle, flat, and trim) and finishes (steel, brass, stainless steel, aluminum, or silicon bronze). We offer wood screws in interior and exterior versions, which are useful for applications such as:

  • Wood to wood
  • Trim to wood
  • Cabinets
  • Decking
  • Fences

Tapcon® Concrete Screws

Tapcon offers some of the best concrete screws in the marketplace, with their unique blue coating that resists corrosion and harsh conditions. Tapcons are available at all our yard locations, in a variety of lines.


Nails can be faster and easier to install than screws. Drywall nails are used in drywall-to-wood framing applications for both commercial and residential settings. We have a wide selection ranging in size from 7/8 inch to 3 1/2 inch, including: drywall nails, cement-coated nails, and cupped-head nails.

Buy the Best Fasteners from the Best in the Business

GSC, Ryan, and ASI carry a large number of fastening products for residential and commercial construction, from leading fastener manufacturers like:

Fasteners Delivered to MI and OH Jobsites

ASI, Ryan, and Gypsum Supply Company deliver! It’s true of the quality fasteners we provide, and especially true when it comes to exceptional customer service. That’s why when you have fasteners and other construction supplies delivered directly to your commercial or residential worksites in Michigan and northwest Ohio, you can rely on GSC/Ryan/ASI to also provide:

  • Exactly the drywall products and accessories you need for your local building projects
  • Full stock and scatter delivery service within ~90 miles of our yards in MI and OH
  • Pre- and post-delivery jobsite inspections to ensure product quality
  • Access to our complete line of construction supplies
  • A company-wide focus on safety and regulatory compliance for all employees

Call us or visit one of our construction yards in Michigan and northwest Ohio today.

Construction Products for All Your Needs

GSC, Ryan, and ASI also supply a full range of building materials including drywall, joint treatment, acoustical tiles, tools and more! Whatever the construction job, we’ve got the products you need to get it done right.

Need to talk to an expert to help with your next project?

Experienced and helpful customer service representatives are standing by ready to help.