Flat head screws are characterized by having a head with a flat top and bottom that is cone shaped or countersunk. With this design, the head of the screw can align flush or below the surrounding surface having obvious benefits.
|Driver Availability |
(dependant on size/material)
|Flat Head Screw Specifications |
• ASME B18.3, ASME B18.3.6
• DIN 963 / ISO 2009
• DIN 965 / ISO 7046
• DIN 7991 / ISO 10642
| Flat Head Screw Sizes |
• #00 - 4"
• M1.2 - M100
PEEK Slotted vs. Phillips Driver
| Slotted Head Advantages ||Phillips Head Advantages |
- Slotted head screws tend to strip less than Philips, especially in harsh environments
Slotted heads are typically better in applications where it's going to be unscrewed and re-done periodically, as the head tends to wear less.
In dirty environments, a flat head is much easier to clean out
- Phillips head offers a much stronger joint since it can tolerate more torque.
For most flat head screw designs the angle of countersink is usually 82° for UNC and UNF applications however other angles ranging from 60° -120° could be specified.
|Thread Type ||Normal Flat Head Countersink Angle |
UNC / UNF
|Aerospace ||100° |
|ISO Metric / Imperial ||90° |
Learn more about bolt threading and Extreme Bolt's threading capabilities by visiting our threading options page.
Flat Head Screw Availability