The optimal balance of chemical, mechanical and thermal propertiesFlat Head

PEEK or Victrex® flat head screws are made from polyetheretherketone polymers and offer a unique combination of properties for some of the most extreme applications. PEEK screws are known for their excellent wear resistance, best in class fatigue resistance, high purity and excellent chemical resistance to organics, acids and bases.

Depending on the application, PEEK flat head screws can be reinforced with glass fibers for improved strength and stiffness properties. Reinforced PEEK screws offer greater mechanical robustness especially in applications beyond 350°F (175°C).

PEEK flat head screws are well suited for applications in chemical processing, electronics, transportation, healthcare and other industrial uses.

Screws made from customer specified PEEK grades are available upon request. See our online store (right side) for common PEEK flat head screws or contact us for specialty or quantity requests.

Screw TypesFlat Head ScrewsHex Cap ScrewsPan Head ScrewsSet ScrewsSocket Head Cap Screws


PEEK Flat Head Screw Features and Benefits

PEEK flat head screws are characterized by having a head with a top flat surface (which can feature either a slotted, phillips or allen driver) 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.

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.

 

 

 

Countersink Angle

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

82°

Aerospace 100°
ISO Metric / Imperial 90°


 


Common PEEK Screw Grades

PEEK 100% / Unfilled

PEEK, with no fillers is unreinforced and 100% polymer. Even without glass or carbon fiber reinforcement, this one of the strongest polymers we offer and well suited for a variety of applications including FDA food contact and other applications requireing high purity. 

PEEK Glass Fiber Reinforced

PEEK 30% Glass Fiber Reinforced provide the same chemical resistance and natural PEEK but nearly doubles in tensile strength.

PEEK Carbon Fiber Reinforced 

PEEK 20% Carbon Fiber Reinforced provides approximately 2.5 times the strength of pure PEEK. 

PEEK Extreme

PEEK Extreme is our proprietary receipe for the highest strength PEEK utilizing carbon fiber reinforcement. This version of PEEK over 3 times stronger than standard unreinforced PEEK. 

 


 Mechanical Properties of PEEK

PEEK Tensile Curves 
PEEK Tensile Data

 Chemical Resistance of PEEK / Victrex® Screws

PEEK Chemical Resistance


PEEK Properties

PEEK Properties

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