What Are Self-Tapping Screws, WN 14xx Series Used For?

The primary duty of Self-Tapping Screws, WN 14xx Series is self-tapping screws for plastics in nine head and drive styles. Below: the sectors that specify them in volume, the checklist used to select the right size and material for the application, installation notes, and the known limits of the type. Stocked across roughly 30 to 100, they cover heavy and structural work.

Typical Applications for Self-Tapping Screws, WN 14xx Series

The most common settings where these are specified:

• Electronics housings: plastic bosses.
• Automotive interiors: plastic trim.
• Appliances: housings.
• Consumer goods: plastic parts.

How to Specify Self-Tapping Screws, WN 14xx Series for Your Application

• Size: Match the nominal size to the mating thread or hole. This product spans 30–100; check the full table below for the exact dimensions of each size.
• Drive & head: Pick the drive (socket, cross, slot) and head style for the tool access and seating surface; a recessed drive resists cam-out under power tools.
• Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
• Standard: This product is supplied to WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

• Match the driver exactly to the recess (PH ≠ PZ; hex key sizes per ISO 2936) and keep the tool axial — side load is the main cause of stripped drives.
• In tapped holes, engage a thread length of at least 1× the nominal diameter in steel, 2× in aluminum.
• Set power tools to a torque that seats the head without embedding it into the mating surface.

Common Selection Mistakes with Self-Tapping Screws, WN 14xx Series

• Under-sizing the drive for the installation torque — a small recess at high torque strips before the screw is seated.
• Using a countersunk head in thin sheet where the countersink removes most of the load-bearing material.
• Specifying stainless in high-strength duty: A2-70 is roughly class 7 steel, not a 10.9 substitute.

Where Self-Tapping Screws, WN 14xx Series Are Not the Right Choice

Not for high-preload structural joints (use a property-class bolt and nut), and not in thin sheet where a self-drilling or self-tapping type suits better.