#4-40 Button Head Socket Cap Screws

Alloy Steel with Thermal Black Oxide Coating – High-Strength Screws

Our #4-40 Button Head Socket Cap Screws are made from high-strength alloy steel with a thermal black oxide coating. The black oxide finish enhances corrosion resistance and provides a sleek, professional appearance. The button head design offers a low-profile head and a larger bearing surface, making them ideal for demanding applications like automotive, industrial, and heavy-duty projects.

The low-profile button head provides a smooth, rounded finish, while the Thermal Black Oxide coating adds a mild layer of corrosion resistance, making these screws perfect for indoor use and light outdoor applications.

Key Features

• High Strength: Alloy steel construction provides exceptional tensile strength for demanding applications.
• Black Oxide Finish: Provides mild corrosion resistance for indoor and light outdoor use.
• Low-Profile Head: Button head design provides a smooth, finished appearance with a larger bearing surface.
• Easy Installation: 1/16" hex socket drive allows for secure tightening using hex keys or bits.
• High-Quality Assurance: Monster Bolts offers only the highest quality fasteners that meet or exceed industry standards.

Specifications

• Diameter: #4
• Thread Size: 40 TPI – Coarse (Standard) Thread
• Drive Type: 1/16" Hex Socket
• Head Type: Button Head Socket Cap Screw
• Material: Alloy Steel with Thermal Black Oxide Coating
• System of Measurement: Inch (Imperial / U.S.)
• Standards Met: ANSI/ASME B18.3, ASTM F835

Usage Information

These high-strength button head socket cap screws are ideal for applications requiring a strong, reliable fastener with a low-profile head. The 1/16" hex socket drive allows for high torque installation, ensuring a secure fit. The #4-40 size is commonly used in machinery, equipment assembly, and automotive applications where strength and appearance are important.

Ideal Applications

• Machinery and Equipment Assembly
• Automotive and Motorcycle Applications
• Robotics and Automation Equipment
• Metal and Plastic Fabrication
• Furniture and Cabinetry
• DIY Projects and Repairs

Matching Products

• Nuts: Find matching #4-40 nuts here.
• Washers: Find matching washers here.
• Hex Keys: Find 1/16" hex keys and bits here.

Order Yours Today

Enhance your projects with our high-strength #4-40 Button Head Socket Cap Screws. Perfect for achieving a professional look and secure fastening in demanding applications. Order today and experience Monster Bolts’ fast shipping and superior customer service!

✔️ Trusted by professionals and hobbyists alike

✔️ High-strength alloy steel with thermal black oxide coating

✔️ Available in various lengths to suit your needs