Flat Head Screws: 4X28 Size, Many Applications

A 1/4x28 flat head screw is a type of fastener used in a variety of applications, including automotive, machinery, and engineering projects. It is often made of stainless steel or alloy steel and may feature a thermal black oxide finish for mild corrosion resistance and a sleek appearance. The flat head design ensures a flush finish, providing a smooth and professional surface. These screws are available in various pack sizes and can be purchased from retailers such as Amazon, Monster Bolts, and Home Depot.

1/4-28 Flat Head Screw with Thermal Black Oxide Finish

The 1/4-28 Flat Head Screw with Thermal Black Oxide Finish is a premium fastener that offers exceptional tensile strength and a sleek black appearance. It is crafted from high-strength alloy steel and finished with a thermal black oxide coating, providing mild corrosion resistance. The flat head design ensures a flush finish in countersunk applications, resulting in a smooth and professional surface.

Features and Benefits

• Exceptional Strength: The screw is made from premium alloy steel, enabling it to withstand demanding applications.
• Thermal Black Oxide Coating: This finish provides mild corrosion resistance and a sleek black finish, suitable for indoor use or light outdoor exposure.
• Precision Fit: The fine-thread design makes it ideal for applications requiring accurate assembly.
• Flush Installation: The flat head ensures a smooth surface and is perfect for countersunk applications.
• Easy Installation: The hex drive is compatible with a 5/32" hex key, allowing for quick and secure fastening.

Applications

The 1/4-28 Flat Head Screw with Thermal Black Oxide Finish is perfect for precision applications in automotive, machinery, and engineering projects. It can also be used in heavy-duty projects, industrial machinery, construction, and more. The screw meets or exceeds industry standards and is trusted by professionals worldwide.

Specifications

• Thread Size: 28 TPI - Fine Thread
• Length: Measured from the top of the head (countersunk length)
• Drive: 5/32" Hex Key (Allen Wrench)
• Material: Alloy Steel with Thermal Black Oxide Coating
• Standards: ASTM F835 - 82° Flat Head (Standard)

1/4-28 Flat Head Screw with Stainless Steel Construction

The 1/4-28 Flat Head Screw with Stainless Steel Construction is a versatile fastener used across a range of applications. Its flat head design ensures a flush finish, providing a smooth and professional surface for countersunk installations. This screw is available in various materials, including stainless steel, alloy steel, and black oxide-coated steel, each offering unique advantages.

Stainless Steel Construction

The stainless steel construction of the 1/4-28 flat head screw offers excellent rust resistance, making it ideal for applications where corrosion may be a concern. The specific grade of stainless steel, such as Grade 18-8, can vary, influencing the screw's mechanical properties and corrosion resistance. Stainless steel screws are often chosen for their ability to maintain their appearance and performance in environments where rust and oxidation are prevalent.

Dimensions and Measurements

The dimensions of the 1/4-28 flat head screw are defined by its diameter and thread pitch. The "1/4" refers to the nominal diameter of the screw, measured at its widest point, while "28" indicates the number of threads per inch. The thread pitch, or distance between each thread, is a critical factor in ensuring proper thread engagement and fastening performance.

Applications and Compatibility

The 1/4-28 flat head screw is commonly used in automotive, machinery, and engineering projects. It is designed to be used with a nut of the same size and can be easily installed with most standard wrenches or hex keys. The flat head design allows for a smooth, flush finish, making it ideal for applications where a clean and unobtrusive appearance is desired.

Purchasing Options

The 1/4-28 flat head screw with stainless steel construction is typically available in packs of 10, 15, 20, or 25 screws. Some retailers offer volume pricing, providing discounts when purchasing larger quantities. It is recommended to verify the specific dimensions, material grade, and compatibility with your project requirements before making a purchase.

1/4-28 Flat Head Screw with Hex Drive

The 1/4-28 Flat Head Screw with Hex Drive is a highly versatile fastening solution, ideal for applications requiring fine-thread screws and accurate assembly. This screw features a flat head design, ensuring a flush finish when used in countersunk applications, resulting in a smooth and professional surface.

The Hex Drive provides a secure fastening method, even in high-stress environments. The Hex Drive is compatible with a 5/32" hex key, allowing for quick and easy installation. The flat head screw is designed to meet ASTM F835 standards and is typically crafted from high-strength alloy steel, providing exceptional tensile strength.

A notable feature of the 1/4-28 Flat Head Screw is its thermal black oxide coating. This finish not only imparts a sleek black appearance but also offers mild corrosion resistance, making it suitable for indoor use or light outdoor exposure. The black oxide coating enhances the screw's aesthetic appeal, especially in automotive, machinery, and engineering projects.

The 1/4-28 Flat Head Screw with Hex Drive is commonly available in packs of 10, 15, or 25, ensuring you have the right amount for your project. It's important to note that the length of the screw is measured from the top of the head (countersunk length). When purchasing, ensure you select the appropriate length for your specific application.

This screw type is widely used in various industries, including automotive, machinery, and engineering, where its fine-thread design and high-strength properties make it a preferred choice for precision applications.

1/4-28 Flat Head Screw with Bright Finish

The 1/4-28 Flat Head Screw with Bright Finish is a high-quality fastening solution for a wide range of applications. Crafted from premium materials and finished with a bright coating, these screws offer strength, durability, and a sleek appearance.

Features and Benefits:

• Bright Finish: The bright finish on these screws provides a clean and polished look to your projects. It enhances the visual appeal of the screw, making it ideal for applications where aesthetics are important.
• Flat Head Design: The flat head design ensures a flush finish when installed in countersunk holes. This provides a smooth and professional surface, making it perfect for applications where a seamless appearance is desired.
• Secure Fastening: Featuring a hex drive, these screws allow for secure fastening even in high-stress environments. The hex socket drive provides a strong and reliable hold, preventing loosening or back-out over time.
• Precision Applications: With a fine thread design, these screws are perfect for precision applications. They are commonly used in automotive, machinery, and engineering projects where accurate assembly and secure fastening are crucial.
• Corrosion Resistance: The bright finish often provides corrosion resistance, protecting the screws from rust and ensuring their longevity even in mild exposure to outdoor elements.
• Easy Installation: The hex drive is compatible with a standard 5/32" hex key or Allen wrench, making installation quick and efficient. This screw is designed for easy fastening without the need for specialized tools.

Specifications:

• Thread Size: 28 TPI (Threads Per Inch) with a fine thread design.
• Length: Measured from the top of the flat head, ensuring an accurate fit for countersunk applications.
• Drive: 5/32" Hex Key or Allen Wrench drive for secure fastening.
• Material: High-strength alloy steel or stainless steel, providing exceptional tensile strength and durability.
• Finish: Bright finish for a clean and polished appearance.
• Standards: Compliant with ASTM F835 standards for flat head screws.

With their combination of strength, precision, and aesthetic appeal, the 1/4-28 Flat Head Screws with Bright Finish are a reliable choice for professionals in various industries.

1/4-28 Flat Head Screw with Button Head

The 1/4-28 Flat Head Screw with Button Head is a versatile and robust fastening solution, offering both functionality and aesthetics for a range of applications. This screw is a popular choice for projects requiring a strong, low-profile fastener with a sleek appearance.

Features and Benefits

The 1/4-28 Flat Head Screw with Button Head stands out due to its unique combination of strength and design. The button head design provides a low-profile, smooth, and rounded finish, making it ideal for applications where a flush surface is desired. Additionally, the larger bearing surface of the button head enhances its load-bearing capacity.

Crafted from high-strength alloy steel, this screw boasts exceptional tensile strength, ensuring it can withstand demanding applications. The thermal black oxide coating further enhances its performance by providing mild corrosion resistance and a sleek black finish. This coating makes the screw suitable for indoor use and light outdoor exposure.

Applications

The 1/4-28 Flat Head Screw with Button Head is a versatile fastener suitable for a wide range of applications, including:

• Automotive and motorcycle assembly
• Machinery and equipment construction
• Robotics and automation equipment
• Metal and plastic fabrication
• Furniture and cabinetry assembly
• DIY projects and repairs

Installation

The screw features a 5/32" hex socket drive, allowing for easy and secure installation. The hex socket enables high-torque installation, ensuring a tight and reliable fit.

Standards and Compliance

The 1/4-28 Flat Head Screw with Button Head meets or exceeds industry standards, complying with ANSI/ASME B18.3 and ASTM F835 specifications.

Frequently asked questions