Exceptional purity and chemical resistance with moderate strengthhex cap screw

  • High Purity and low extractables
  • Chemically resistant to most common solvents including acids, salts, oils and steam
  • Mechanical strength and toughness to 150°C (300°F)
  • Resistance to ultraviolet, nuclear radiation, and standard sterilization methods
  • Resistance to weathering and fungi
  • PVDF hex head cap screw features and benefits

PVDF hex head cap screws are made from a tough engineered fluoro-thermoplastic that offers a unique balance of excellent chemical resistance and good strength properties.

PVDF hex head cap screws have the characteristic stability of fluoropolymers when exposed to harsh chemical and ultraviolet environments but are much stronger mechanically than PTFE or PFA polymers.  PVDF screws / Kynar screws also excel in high purity and low-permeability applications such as pharmaceutical and semi-conductor processing.

PVDF hex head cap screws are available in most metric and standard sizes. See our online store (top right) for common sizes or contact us for your specific requirements.

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

 


PVDF Hex Head Cap Screw Features and Benefits

It is important to differentiate between a PVDF hex head cap screw and hex head bolt. Often people assume they are the same, but they are actually very different fasteners in terms of how they are manufactured, as well as from an application perspective. Regardless of your choice, PVDF hex heads offer strong, stable joints because of their large head service.

The Hex Comparison

Hex Head Cap Screw Hex Head Bolts
  • Precise applications where tight tolerances on the body dimensions are required. 
  • Features flat washer facing under the bolt head.
  • Also called a finished hex bolt.
  • Appropriate for when mechanical properties are more important than dimensional tolerances. 
  • Hex bolts have a flat end and lack the washer face under the head.

PVDF Hex Head Cap Screw Advantages  

The most important feature of a PVDF hex head cap screws is that it has a larger bearing surface area which provide better clamping pressure than other type of fastener such as a socket head cap screw. Additionally, since debris build up is less of an issue with this style of fastener verses a socket head cap screw, they are ideal of dirty applications where particles could clog up a socket. Though PVDF socket heads are typically used for tight access applications, hex heads can be a better choice when there is only side clearance available for tightening. 


PVDF Mechanical  & Physical Properties

PVDF - Kynar Properties  PVDF Mechanical Data

PVDF Chemcial Resistance Compared to Other Polymers

PVDF Chemical Resistance 


 

 

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