Dimensions and Pricing Guide for No. 208 Self Tapping Screws

Understanding No. 8 Self-Tapping Screw Dimensions and Price List

Self-tapping screws are essential fasteners widely used in construction, woodworking, and automotive applications. Among the numerous sizes available, the No. 8 self-tapping screw is a popular choice due to its versatility and strength. This article explores the dimensions, applications, and price ranges of No. 8 self-tapping screws, providing valuable insights for professionals and DIY enthusiasts alike.

Dimensions of No. 8 Self-Tapping Screws

The No. 8 designation refers to the screw's diameter, which is approximately 0.164 inches (4.2 mm). Self-tapping screws often vary in length, head type, and thread design, all of which can impact their performance and suitability for specific tasks. Common lengths for No. 8 screws range from 3/4 inch (19 mm) to 2 inches (51 mm), with the length selection typically depending on the materials being joined.

The head type of a No. 8 self-tapping screw can vary, including flat, hex, pan, or round shapes. Each type is designed for different applications, with flat heads providing a flush finish, while pan heads can facilitate easier installation with a larger bearing surface. Additionally, self-tapping screws may come with various drive types such as Phillips, slotted, or Torx, each offering different advantages in terms of torque and ease of use.

The thread design generally includes either coarse or fine threads or a combination of both. Coarse threads are ideal for quick engagement in softer materials, while fine threads provide greater holding power in harder materials. Understanding these nuances in dimensions is crucial when selecting the appropriate screw for your project.

Applications of No. 8 Self-Tapping Screws

No. 8 self-tapping screws are employed in numerous applications due to their adaptability. Commonly, they are used in metal-to-metal fastening, such as in the assembly of light-gauge steel and aluminum. Their self-tapping feature allows them to create their own mating thread in materials, thus eliminating the need for pre-drilling, which saves significant time during installation.

Additionally, these screws are favored in woodworking applications, especially in scenarios where quick assembly is necessary. The ability to tap threads into wood makes No. 8 self-tapping screws ideal for furniture assembly, cabinetry, and general carpentry projects.

Price Range of No. 8 Self-Tapping Screws

When it comes to the cost of No. 8 self-tapping screws, several factors come into play, including material, coating, and quantity. As of 2023, the price range can vary significantly. For instance, basic galvanized or zinc-coated No. 8 self-tapping screws may cost around $0.05 to $0.15 per screw when purchased in bulk. Specialty coatings, such as stainless steel or black oxide, can increase the price to approximately $0.15 to $0.30 per screw.

Furthermore, purchasing screws in larger quantities often leads to bulk discounts, which can be attractive for contractors and businesses. Retail prices might be higher—typically ranging from $0.10 to $0.50 per screw—if bought individually from hardware stores.

Conclusion

Choosing the right fastener is crucial for the success of any project, and understanding the dimensions and pricing of No. 8 self-tapping screws can help in making informed decisions. Their versatility, ease of use, and variety of applications make them a staple in both commercial and residential projects. Always consider the specific requirements of your application, including material type and installation method, when selecting the appropriate size and type of screw. With the right information, you can ensure that your projects are secure and professionally finished, all while staying within your budget.