Machine Screws

Machine screws are threaded fasteners designed to securely join two or more parts together. They are typically made of metal, such as steel or stainless steel, and have a cylindrical shaft with threads along their entire length. Unlike bolts, machine screws do not have pointed ends and are often used in conjunction with tapped holes and nuts.

Wide Range of Applications

Machine screws find applications across various industries, including manufacturing, construction, automotive, electronics, and more. They are available in a variety of sizes, thread pitches, and head styles to suit different needs and applications.

Popular Head Styles

  • Binding Undercut: Ideal for electrical connections due to its flat bearing surface and annular undercut.
  • Button: Features a domed top that protrudes above the fastening surface.
  • Fillister (or Cheese): Commonly used in counterbored holes due to its rounded top and cylindrical sides.
  • Flat: Countersunk head with a flat top, suitable for applications where protrusion is undesirable.
  • Indented Hex: Preferred for high-volume assembly due to its indented top and ability to transmit higher torque.
  • Indented Hex Washer: Offers additional protection to the mating surface.
  • Oval: Countersunk head with a rounded top, often used in conical applications or for decorative purposes.
  • Pan: General-purpose head style with a flat or gently rounded top.
  • Round: Semi-elliptical top surface, preferred for its smooth appearance.
  • Truss: Low-profile head, suitable for applications with minimal clearance.

Drive Styles

  • Hex Slotted/Unslotted: Tightened or loosened with a hex wrench.
  • One Way Tamper Proof: Used in permanent applications for security.
  • Phillips: The most common drive style, providing good control.
  • Phillips Pin Head: Tamper-resistant version of the Phillips drive.
  • Phillips/Slotted Combo: Accepts both Phillips and slotted screwdrivers.
  • Six-Lobe (Torx Tamper Proof): High-security drive requiring a special tool.
  • Slotted: Traditional drive style using a flat-blade screwdriver.
  • Spanner Tamper Proof: Unique design requiring a special tool.
  • Triangular Slotted: Another security-focused drive style.

SEMS Machine Screws

For added convenience and efficiency, SEMS machine screws are pre-assembled with washers, offering a cost-effective solution for many applications.

AFT Fasteners is a leading provider of machine screws, offering a vast selection of over 5,000 types and sizes in both metric and inch dimensions. Our experienced sales team is available to assist you in finding the perfect machine screws for your specific needs. Contact us today for a custom quote or to explore our extensive product line.

Machine Screw Resources: