Short Run Pro - Manufacturer of metal parts, custom metal brackets and custom metal fabrication services provider.
  • Screw Head Shapes

    Screw Head Shapes

  • (a) PAN,
    (b) BUTTON,
    (c) ROUND,
    (d) TRUSS,
    (e) FLAT,
    (f) OVAL
    • pan head: a low disc with chamfered outer edge.
    • button or dome head: cylindrical with a rounded top.
    • round head: dome-shaped, commonly used for machine screws.
    • truss head: lower-profile dome designed to prevent tampering.
    • flat head or countersunk: conical, with flat outer face and tapering inner face allowing it to sink into the material.
    • oval or raised head: countersunk with a rounded top.
    • bugle head: similar to countersunk, but there is a smooth progression from the shaft to the angle of the head, similar to the bell of a bugle.
    • cheese head: disc with cylindrical outer edge, height approximately half the head diameter.
    • fillister head: cylindrical, but with a slightly convex top surface.
    • socket head: cylindrical, relatively high, with different types of sockets (hex, square, torx, etc.).
    • mirror screw head: countersunk head with a tapped hole to receive a separate screw-in chrome-plated cover, used for attaching mirrors.
    • headless (set or grub screw): has either a socket or slot in one end for driving.