A193 B7 12-Point Flange Head Screws
Product Overview
A193 B7 12-Point Flange Head Screws are high-strength threaded fasteners widely used in applications that demand superior clamping force and resistance to high pressures and temperatures. These screws are manufactured from alloy steel material and typically undergo a range of heat treatments to enhance their mechanical properties. The 12-point flange head design offers higher torque capability compared to hex or socket heads, making it especially suitable for high-performance environments like automotive, aerospace, and industrial installations.
These fasteners conform to ASTM A193 Grade B7 specifications, ensuring reliable performance under critical conditions. Their flange design also acts as a washer, distributing load evenly and minimizing surface damage.
Product Specifications Table
| Specification | Detail |
|---|---|
| Product Name | A193 B7 12-Point Flange Head Screws |
| Material | ASTM A193 Grade B7 alloy steel |
| Head Style | 12-Point Flange |
| Thread Type | Unified National Thread (UNF/UNC) |
| Sizes Available | 1/4” to 2” diameter |
| Length Range | 1” to 12” |
| Finish Available | Nickel Plated, Teflon, Black Oxide, Hot-dip galvanizing |
| Drive Type | 12-Point Socket Drive |
| Packaging | Inner box & Outer carton / Customized Packaging |
Technical Parameters Table
| Parameter | Value |
|---|---|
| Strength Class | Grade B7 (equiv. to SAE J429 Grade 5) |
| Tensile Strength | Minimum 125 ksi (860 MPa) |
| Yield Strength | Minimum 105 ksi (724 MPa) |
| Surface Finishes | Zinc Plated, Black Oxide, Dacromet |
| Standards Compliance | ASTM A193, ANSI B18.2.1, RoHS |
| Operating Temperature | -50°C to +450°C |
| Certifications Available | ISO 9001, CE, RoHS |
Material Introduction and Manufacturing Process
A193 B7 Screws are manufactured from chromium-molybdenum alloy steel, known for its excellent tensile strength, wear resistance, and high-temperature performance. The production process includes:
- Raw Material Preparation (ASTM A193 B7 steel rods)
- Cold/Hot Forging into 12-point flange head shape
- Thread Rolling
- Heat Treatment including quenching and tempering
- Surface Treatment (zinc plating, black oxide, etc.)
- Quality Inspection
- Final Packaging
The use of precision cold forging and thread rolling ensures dimensional accuracy and thread integrity. Heat treatment further enhances mechanical properties for high-stress applications.
Industries and Common Applications
These screws are commonly used in the following industries and scenarios:
- Automotive Performance Engines
- Aerospace Assemblies
- Oil and Gas Equipment
- Heavy Machinery
- Power Generation
- Chemical Processing Plants
The high torque capability and vibration resistance make A193 B7 12-point flange head screws an excellent choice wherever reliability and strength are paramount under harsh working conditions.
Product Advantage and Competitive Edge
12-Point Flange Screws Advantages
- Premium Material Quality: Constructed from high-grade alloy steel for exceptional tensile and yield strength.
- Precision Engineering: Close tolerance thread forming and accurate head forging prevent loosening under vibration.
- Advanced Surface Treatments: Surface finishes provide excellent corrosion and wear protection in aggressive environments.
- Customization: Available in a variety of lengths, thread pitches, and surface finishes. Custom manufacturing based on prints or prototypes.
- Inventory and Delivery: Robust stock capabilities ensure quick turnaround times.
- Tech Support and Warranty: Pre-sale consultation and after-sale technical support by experienced engineers.
Quality Inspection and Control Measures
At Flybear Fastener, we prioritize product quality at every production stage. Our quality control framework includes:
- Full compliance with ISO 9001 and IATF16949 standards.
- 100% inspection using optical sorting machines.
- Thread gauges to ensure pitch conformity.
- Salt spray test for corrosion resistance validation.
- Tensile strength testing with calibrated tensile machines.
- Torque testing under simulated working conditions.
- Environmental compliance tests (e.g., RoHS check).
This robust quality control ensures the consistency and reliability of every product lot.
Selection and Procurement Guide
When selecting A193 B7 12-point flange head screws, consider the following:
- Confirm thread type (UNC/UNF/metric) compatible with your assembly.
- Choose appropriate surface treatment based on the working environment.
- Determine correct bolt length considering the flange thickness.
- Select strength class that matches application load requirements.
- Check for certifications and compliance with required standards.
For bulk orders, technical customization, or consultation, always partner with an experienced supplier like Flybear Fastener for safe and optimized procurement.
Summary and Corporate Profile
At Flybear Fastener, we firmly believe in “Quality First, Customer Foremost” and are dedicated to delivering high-performance fasteners crafted via world-class manufacturing processes.
We deliver more than just fasteners—we deliver comprehensive fastening solutions tailored to your industry needs. Our team is always ready for customer-specific developments, project discussions, and rapid dispatch from our stocked inventory.
Contact our experts today to explore solutions that suit your demand. Click here to contact us for personalized support, samples, or a project quotation. Let’s strengthen your structures—one fastener at a time.
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