Alloy Steel Set Screw, Plain Finish, Hex Socket Drive, Dog Point, Meets ASME B18.3/ASTM F912, 5/16" Length, 1/4"-28 Threads (Pack of 100)

Set screws are often used for holding a pulley, gear, or other parts from turning relative to a shaft.The black oxide coating provides some lubricity to the product, meaning that there is less friction generated when using these products. The coating also provides a mild corrosion resistance but should not be relied on in environments where corrosion resistance is a primary concern. Alloy steel is steel that has been alloyed with other materials to improve overall physical properties. Steels are designated by a four-number SAE Steel grade. The first two digits indicate the primary materials used to form the steel. The last two digits identify the percentage of carbon for the alloy (in hundredths). Tensile strength ranges for the alloys typically used in these fasteners range from 170,000 to 180,000 psi (pounds per square inch), making these among the strongest materials.Hex socket drive systems are driven by hex wrenches or power tools with hexagonal bits. Also called extended or pilot point, the flat tip of the dog point is extended to fit into an existing hole to join two items together.A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine.

• Black oxide coating helps reduce friction and provides mild corrosion resistance
• Alloy steel is one of the strongest materials used in fasteners, making this an ideal material to use when the primary concern is the application pulling apart
• Hex socket is driven by hex wrenches or power tools with hexagonal bits
• Dog point (also known as extended or pilot point) extends to fit into an existing hole to join items together