18-8 Stainless Steel Set Screw, Internal Hex Drive, Cup Point, Meets ASME B18.3/ASTM F880, 1/4" Length, #0-80 Threads (Pack of 100)

Set Screws are often used for holding a pulley, gear, or other parts from turning relative to a shaft. Stainless steels are used for their corrosion resistance, high-temperature strength, scaling resistance, and low-temperature toughness.  These properties account for their extremely wide use in practically every industry. Austenitic Stainless Steels are alloys of iron and carbon that contain between 16% and 30% Chromium, a maximum of 0.15% carbon, along with Nickel (or Manganese), and other alloying elements.  The chromium, which helps develop a passive surface oxide film, provides corrosion resistance in stainless steels.   Austenitic Stainless Steels are designated by a 3 digit SAE Stainless Steel Grade beginning with the number 3 (e.g. 304, 316).  Another common naming convention for Austenitic Stainless Steels are 18/8, 18/10, 18/0, etc. where the 18 refers to the % of Chromium and 8 to the % of Nickel contained in the material.    Hex socket drive systems are driven by hex wrenches or power tools with hexagonal bits. 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. Fine threads are preferable when working with harder materials or when threading into a thin material. They are also stronger in tension than coarse threads, and generally provide higher shear strengths.

• Set Screws keep parts from turning relative to a shaft
• Stainless Steel is suitable where formability and cost are important considerations
• Do not have an external head
• Drive system is a hexagon-shaped hole
• Fine threads tap better into harder materials and thin walls, and are stronger in tension than coarse threads