Standard: DIN6928, ASME/ANSI B18.6.4
Material: C1022A, SUS410,SUS304,SUS316
Specification: ST3.5, ST3.9, ST4.2, ST4.8, ST5.5, ST6.3, 6#, 7#, 8#, 10#, 12#, 14#, 1/4”
Surface Treatment: Passivated, Galvanized, Nickel-plated, Blackened, Head sprayed, Dacromet, Hot Rust, Rasputin
Product Introduction
Hexagon Head Sharp Point Self-Tapping Screws are designed for heavy-duty metal fastening applications requiring high torque transmission and secure thread engagement in pre-drilled holes. The hexagon head enables positive engagement with standard hex socket tools for reliable torque transfer during installation. The sharp point design enables precise alignment and entry into pilot holes, facilitating consistent thread formation during installation. These screws cut mating threads in pre-drilled holes, providing secure engagement without requiring a separate tapping operation. Available in carbon steel (C1022A) and stainless steel (SUS410, SUS304, SUS316) material options, the screws comply with DIN6928 and ASME/ANSI B18.6.4 standards. Multiple surface treatments provide corrosion resistance options for various environmental conditions, including galvanized, passivated, nickel-plated, blackened, and Dacromet finishes.
Core Advantages
01
Hexagon Head Design
Enables positive engagement with standard hex socket tools for high torque transmission and secure fastening.
02
Sharp Point Design
Precise alignment and entry into pilot holes enables consistent thread formation during installation.
03
Self-Tapping Thread
Cuts mating threads in pre-drilled holes, providing secure engagement without requiring a separate tapping operation.
04
Multiple Material Options
Available in carbon steel (C1022A) and stainless steel (SUS410, SUS304, SUS316) to meet diverse application requirements.
05
Wide Specification Range
Metric sizes from ST3.5 to ST6.3 and imperial sizes from 6# to 1/4" for comprehensive application coverage.
06
Extensive Surface Treatments
Passivated, galvanized, nickel-plated, blackened, Dacromet, and hot rust finishes for environmental adaptability.
Product Features
Hexagon head configuration Positive engagement with standard hex socket tools provides reliable torque transmission for controlled installation in heavy-duty applications.
Sharp point design Precise alignment and entry into pilot holes enables consistent thread formation for secure fastening in metal substrates.
Self-tapping thread Cuts mating threads in pre-drilled holes, providing secure engagement without requiring a separate tapping operation.
Carbon steel material C1022A grade offers strength for general metal fastening applications with appropriate surface treatment.
Stainless steel material options SUS410 provides hardness, SUS304 offers general corrosion resistance, and SUS316 delivers marine-grade protection.
Metric specification range Available in ST3.5, ST3.9, ST4.2, ST4.8, ST5.5, and ST6.3 diameters for diverse thread size requirements.
Imperial specification range Available in 6#, 7#, 8#, 10#, 12#, 14#, and 1/4" sizes for North American standard applications.
Surface treatment options Galvanized and passivated finishes provide general corrosion protection; nickel-plated offers enhanced appearance; blackened delivers aesthetic matte finish; Dacromet provides high salt spray resistance.
Application Scenarios
Structural steel connections
Heavy equipment assembly
Industrial machinery
Automotive components
Railway applications
Bridge and infrastructure
Heavy-duty metal fabrications
Construction equipment
These hexagon head sharp point self-tapping screws are deployed in heavy-duty metal fastening applications requiring high torque transmission and secure thread engagement in pre-drilled holes. Applications include structural steel connections where reliable fastening is essential, heavy equipment assembly, industrial machinery, automotive components, railway applications, bridge and infrastructure projects, heavy-duty metal fabrications, and construction equipment where the hexagon head provides high torque capability and the sharp point enables precise alignment in pilot holes.
Common Questions and Solutions
What is the recommended socket size for these screws?
Select a hex socket that fits the hexagon head precisely. The socket size varies by thread diameter. Using the correct socket size prevents rounding of the hex corners and ensures positive engagement for torque transfer.
How do I select the correct pilot hole size for these screws?
Pilot hole size varies based on screw diameter and material hardness. Refer to the technical datasheet for recommended pilot hole diameters for each specification to ensure proper thread engagement and prevent material damage or thread stripping.
What is the difference between carbon steel and stainless steel options?
Carbon steel (C1022A) provides high strength for general applications and is typically used with corrosion-resistant coatings. Stainless steel (SUS410) offers hardness for structural applications, SUS304 provides general corrosion resistance, and SUS316 delivers superior marine-grade protection for harsh environments.
What surface treatment provides the best corrosion protection?
Dacromet coating provides the highest salt spray resistance, with tests reaching up to 1000 hours. Hot-dip galvanizing offers corrosion resistance for outdoor structural applications. For stainless steel fasteners, passivation treatment enhances the natural oxide layer for improved corrosion resistance.
Can these screws be used with aluminum substrates?
Yes, but consider galvanic compatibility. Zinc-plated carbon steel screws can create galvanic corrosion with aluminum in certain environments. Specialized coatings or stainless steel options are recommended for long-term aluminum-to-metal applications.
What is the recommended installation speed for hexagon head self-tapping screws?
Install at controlled speeds to prevent thread galling and ensure proper thread formation. Use torque-controlled drivers to prevent over-tightening when the hex head seats against the workpiece surface. Excessive speed may cause thread damage or material overheating.
Installation Considerations
1
Select the correct hex socket size for the screw head to prevent rounding and ensure positive torque transmission during installation.
2
Drill pilot holes to the recommended diameter for the specific screw size and material thickness to ensure proper thread engagement.
3
Use torque-controlled installation tools to prevent over-driving. The hex head should seat against the workpiece surface without damaging the head or surrounding material.
4
Apply appropriate spindle speed to prevent thread galling; excessive speed may cause thread damage or thermal buildup.
5
Ensure perpendicular alignment between screw axis and workpiece surface to prevent cross-threading and ensure proper engagement.
6
For outdoor applications requiring extended corrosion resistance, specify Dacromet, hot-dip galvanized, or stainless steel materials based on environmental exposure conditions.
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