Oct 20, 2026Guides
How to Choose Screws for Plastic Assembly
Learn how to choose screws for plastic assembly, including thread type, pilot hole size, material, torque control and common problems such as cracking or stripping.
Plastic parts are widely used in electrical products, appliances, housings, brackets, automotive components and consumer goods. In these assemblies, the screw looks like a small detail, but the wrong screw can cause cracking, stripped holes, weak holding force or unstable production.
Choosing screws for plastic is different from choosing screws for metal. Plastic is softer, more elastic and more sensitive to stress. The screw must create enough holding force without damaging the boss or the hole.
The right choice depends on plastic material, hole design, thread type, screw point, installation torque and whether the part needs to be removed later.
