Types of screws for plastic

The table below offers a guide to select the screw to be use based on the type of plastic to be assembled. Field tests will determine the optimal solution based on hole geometry, mechanical requirements and installation parameters. 

The type of plastic is determined by its Bending Modulus (Flexural Modulus):

• Ductile plastics < 1,900 MPa (< 275,571 psi)
• Medium plastics 1,900 - 2,999 MPa (275,571 - 434,968 psi)
• Hard plastics 3,000 - 6,850 MPa (435,113 - 993,508 psi)
• Very Hard plastics > 6,850 MPa (> 993,508 psi)