close
Choose Your Site
Global
Social Media
 |
The High-Strength Penta Head Bolt is a specialized structural fastening solution designed to provide secure and reliable connections in demanding construction applications.
| Quantity: | |
|---|---|
Length ——————— Model | 10mm-30mm | 30mm-50mm | 50mm-80mm | 80mm-100mm | 100mm-150mm |
1/4-20 | ● | ● | ● | ||
5/16-18 | ● | ● | ● |
|
|
3/8-16 | ● | ● | ● | ● | ● |
1/2-13 | ● | ● | ● | ● | ● |
9/16-12 | ● | ● | ● | ● | ● |
5/8-11 | ● | ● | ● | ● | ● |
3/4-10 | ● | ● | ● | ● | ● |
M3-0.5 | ● | ● |
|
| |
M4-0.7 | ● | ● | ● |
| ● |
M5-0.8 | ● | ● | ● |
|
|
M6-1.0 | ● | ● | ● |
|
|
M8-1.25 | ● | ● | ● | ● |
|
M10-1.5 | ● | ● | ● | ● |
|
M12-1.75 | ● | ● | ● | ● | |
M16-2.0 | ● | ● | ● | ● | ● |
M20-2.5 | ● | ● | ● | ● | ● |
Its unique five-lobe head design not only offers enhanced tamper resistance but also distributes clamping force evenly across the bearing surface, ensuring high tensile performance in critical load-bearing joints .
Parameter | Value |
Material | High-Tensile Steel (8.8 - 12.9 grade, quenched and tempered) |
Size Range | M10 - M30 (custom diameters and thread pitches available) |
Thread Type | Metric coarse (ISO metric thread, 6g class fit) |
Tensile Strength | 800 - 1290 MPa (per grade; 8.8=800MPa, 12.9=1290MPa) |
Surface Treatment | Hot-dip galvanized (min. 85μm coating) or zinc-plated (5-10μm) with passivation |
Head Style | Penta (5-lobe) with 12-point drive for high torque application |
• Tamper-resistant design with unique penta head profile that prevents unauthorized removal without specialized tools
• High clamping force retention even under dynamic loads, ensuring structural integrity over time
• Corrosion-resistant coatings that provide long-term protection in outdoor and humid environments
• Compatible with standard wrenching tools (12-point sockets) for easy installation
• Thread rolling process that improves fatigue strength compared to cut threads
Critical for steel frame structures in commercial buildings, bridge deck assemblies, precast concrete connections in high-rise construction, and heavy equipment mounting in infrastructure projects. Approved for use in seismic zones requiring high ductility and load-bearing capacity, including earthquake-resistant building systems and offshore platform structures.
Q: What grade is recommended for structural steel?
A: Grade 10.9 is standard for structural applications, providing an optimal balance of strength and ductility; grade 12.9 is available for high-load requirements in heavy machinery.
Q: Can these bolts be used in coastal environments?
A: Yes, with hot-dip galvanization providing 5000+ hours of salt spray resistance; for extreme coastal conditions, we recommend additional cathodic protection.
Q: What's the minimum breaking torque for M20 grade 10.9 bolts?
A: Minimum breaking torque is 520 Nm, exceeding industry standards for structural applications.
Length ——————— Model | 10mm-30mm | 30mm-50mm | 50mm-80mm | 80mm-100mm | 100mm-150mm |
1/4-20 | ● | ● | ● | ||
5/16-18 | ● | ● | ● |
|
|
3/8-16 | ● | ● | ● | ● | ● |
1/2-13 | ● | ● | ● | ● | ● |
9/16-12 | ● | ● | ● | ● | ● |
5/8-11 | ● | ● | ● | ● | ● |
3/4-10 | ● | ● | ● | ● | ● |
M3-0.5 | ● | ● |
|
| |
M4-0.7 | ● | ● | ● |
| ● |
M5-0.8 | ● | ● | ● |
|
|
M6-1.0 | ● | ● | ● |
|
|
M8-1.25 | ● | ● | ● | ● |
|
M10-1.5 | ● | ● | ● | ● |
|
M12-1.75 | ● | ● | ● | ● | |
M16-2.0 | ● | ● | ● | ● | ● |
M20-2.5 | ● | ● | ● | ● | ● |
Its unique five-lobe head design not only offers enhanced tamper resistance but also distributes clamping force evenly across the bearing surface, ensuring high tensile performance in critical load-bearing joints .
Parameter | Value |
Material | High-Tensile Steel (8.8 - 12.9 grade, quenched and tempered) |
Size Range | M10 - M30 (custom diameters and thread pitches available) |
Thread Type | Metric coarse (ISO metric thread, 6g class fit) |
Tensile Strength | 800 - 1290 MPa (per grade; 8.8=800MPa, 12.9=1290MPa) |
Surface Treatment | Hot-dip galvanized (min. 85μm coating) or zinc-plated (5-10μm) with passivation |
Head Style | Penta (5-lobe) with 12-point drive for high torque application |
• Tamper-resistant design with unique penta head profile that prevents unauthorized removal without specialized tools
• High clamping force retention even under dynamic loads, ensuring structural integrity over time
• Corrosion-resistant coatings that provide long-term protection in outdoor and humid environments
• Compatible with standard wrenching tools (12-point sockets) for easy installation
• Thread rolling process that improves fatigue strength compared to cut threads
Critical for steel frame structures in commercial buildings, bridge deck assemblies, precast concrete connections in high-rise construction, and heavy equipment mounting in infrastructure projects. Approved for use in seismic zones requiring high ductility and load-bearing capacity, including earthquake-resistant building systems and offshore platform structures.
Q: What grade is recommended for structural steel?
A: Grade 10.9 is standard for structural applications, providing an optimal balance of strength and ductility; grade 12.9 is available for high-load requirements in heavy machinery.
Q: Can these bolts be used in coastal environments?
A: Yes, with hot-dip galvanization providing 5000+ hours of salt spray resistance; for extreme coastal conditions, we recommend additional cathodic protection.
Q: What's the minimum breaking torque for M20 grade 10.9 bolts?
A: Minimum breaking torque is 520 Nm, exceeding industry standards for structural applications.
