Specification: ST4.2-18*32

Material: SUS410

Surface Treatment: Brightening

Single weight：2.6

Product Introduction

The Pan Head Phillips Self-Drilling Screw is designed for general-purpose metal fastening applications requiring a widely compatible drive system with an aesthetic finish. The pan head configuration provides a flat underside for accurate clamping force distribution when securing brackets, fittings, and metal components. The Phillips drive enables positive engagement with standard cross-point drivers, offering broad tool compatibility for convenient installation. The self-drilling point drills and taps threads simultaneously, eliminating pilot hole requirements and reducing assembly time. Manufactured from SUS410 stainless steel with brightening surface treatment, this screw provides hardness for metal fastening with an aesthetic bright finish. The ST4.2-18 thread specification with 32mm length offers engagement for sheet metal and light structural assemblies where appearance is a consideration.

Core Advantages

Phillips Drive

Widely compatible cross-point drive system enables easy engagement with standard Phillips drivers for convenient installation.

Pan Head Configuration

Flat underside provides accurate clamping force distribution when securing brackets, fittings, and metal components.

Self-Drilling Point

Drills and taps threads in a single operation, eliminating pilot hole requirements and reducing installation time.

SUS410 Stainless Steel

Provides hardness for metal fastening applications with corrosion resistance for demanding environments.

Brightening Treatment

Aesthetic bright finish with enhanced surface smoothness and improved corrosion resistance.

Standard Specification

ST4.2-18 thread with 32mm length provides consistent performance for sheet metal and light structural assemblies.

Product Features

Phillips drive Widely compatible cross-point drive system enables easy engagement with standard Phillips drivers for convenient installation and broad tool compatibility.

Pan head configuration Flat underside provides accurate clamping pressure for brackets, fittings, and structural connections in metal assembly.

Self-drilling point Drills and taps threads simultaneously, eliminating pilot hole drilling and reducing installation steps.

SUS410 stainless steel material Provides hardness for metal fastening applications with corrosion resistance for demanding environments.

Brightening surface treatment Aesthetic bright finish with enhanced surface smoothness and improved corrosion resistance.

ST4.2-18 thread specification Standardized thread configuration provides consistent performance for sheet metal and light structural assemblies.

32mm length Provides engagement for multiple material layers and sheet metal assemblies.

Application Scenarios

Sheet metal assemblies

Equipment enclosures

Electronics chassis

HVAC duct connections

Furniture construction

Instrumentation mounting

Machine guarding

Architectural metalwork

This pan head Phillips self-drilling screw with brightening finish is deployed in general-purpose metal fastening applications where appearance and tool compatibility are considerations. Applications include sheet metal assemblies with visible fasteners, equipment enclosures requiring aesthetic bright finish, electronics chassis, HVAC duct connections, furniture construction, instrumentation mounting, machine guarding, and architectural metalwork where the brightening treatment provides an attractive appearance and the Phillips drive enables convenient installation with standard tools.

Common Questions and Solutions

What are the advantages of the Phillips drive?

The Phillips drive is a widely used cross-point drive system compatible with standard Phillips drivers found in most toolkits. It provides self-centering engagement and broad tool availability for convenient installation in general-purpose applications.

What is the recommended Phillips driver size for this screw?

Select a Phillips driver that matches the head size specified for the ST4.2 thread. Using the correct driver size prevents driver slippage and damage to the drive recess. Refer to the product specification for the exact Phillips size.

What material thickness can the ST4.2-18*32 screw accommodate?

The ST4.2-18 specification with 32mm length provides engagement for sheet metal and light structural assemblies. The actual maximum material thickness depends on the drill point length and substrate hardness. Consult the technical datasheet for specific thickness recommendations.

What is the brightening surface treatment?

Brightening is a surface treatment process that enhances the natural finish of the stainless steel material. It provides a bright, aesthetic appearance while improving surface smoothness and corrosion resistance through removal of surface contaminants and oxidation.

Is this screw suitable for outdoor applications?

The SUS410 stainless steel material with brightening treatment provides corrosion resistance suitable for indoor and mild outdoor applications. For harsh outdoor environments with extended salt spray exposure, Dacromet or similar high-corrosion coatings may be recommended.

What is the recommended installation speed for this screw?

Install at controlled speeds to avoid overheating the drill point. Excessive speed may reduce drill point life and cause thread stripping. Use torque-controlled drivers to prevent over-tightening when the pan head contacts the workpiece surface.

Installation Considerations

Select the correct Phillips driver size that matches the screw head recess to prevent driver slippage and drive damage during installation.

Use torque-controlled installation tools to prevent over-driving. The pan head should seat against the workpiece surface without damaging the head or surrounding material.

Apply appropriate spindle speed based on material hardness; excessive speed may reduce drill point life and cause thermal damage to the brightening finish.

Ensure perpendicular alignment between screw axis and workpiece surface to prevent drill point deflection and ensure clean hole formation.

The brightening treatment provides aesthetic and corrosion protection. Handle screws with clean gloves to maintain surface appearance and prevent contamination.

For applications requiring specific torque values, consult the technical datasheet for recommended installation parameters.