19mm Hex Bolt: High-Strength Fastening Solution for Demanding Industrial Applications
In the world of heavy-duty construction, machinery assembly, and structural fabrication, the integrity of every connection is paramount. The 19mm hex bolt stands as a critical component in this landscape, engineered to deliver exceptional clamping force, shear strength, and long-term reliability under significant stress. This product page details our premium-grade 19mm hex head bolts, designed to meet and exceed the rigorous demands of global industrial standards, ensuring your projects are built on a foundation of unwavering security.
Product Overview
Our 19mm hex bolt is a cornerstone fastener for applications requiring robust, reliable, and easily installed connections. Characterized by its standard six-sided (hexagonal) head, this bolt is designed for use with common wrenches and sockets, providing excellent torque transmission during installation. Available in a range of material grades, finishes, and thread lengths, our 19mm hex bolt portfolio offers tailored solutions for diverse environmental conditions and load requirements, from securing structural steel to assembling heavy mining equipment.
Key Features
- Premium Material Integrity: Manufactured from high-grade alloy steel, carbon steel, or stainless steel (AISI 304/316), ensuring superior tensile strength and corrosion resistance.
- Precision Engineering: Threads are cold-forged and rolled for enhanced fatigue life and consistent, accurate fit with standard nuts.
- Optimized Bearing Surface: The hex head design provides a large, flat bearing surface to distribute clamp load effectively and prevent embedding in softer materials.
- Rigorous Quality Assurance: Each batch undergoes stringent testing for hardness, tensile strength, and dimensional accuracy per ISO 898-1 and ASTM standards.
- Versatile Coating Options: Available with hot-dip galvanizing, zinc plating, or dichromate finishes for extended service life in harsh or outdoor environments.
Technical Specifications
| Parameter | Specification | Standard / Grade |
|---|---|---|
| Nominal Diameter (d) | 19 mm (M19) | ISO 4014, ISO 4017, ASTM A325 |
| Head Style | Hexagon (Hex Head) | ISO 4014 (Full Size), ISO 4017 (Reduced Size) |
| Common Thread Pitch | 2.5 mm (Standard Coarse), 1.5 mm (Fine) | ISO 261, ISO 262 |
| Standard Lengths (L) | 40mm - 300mm (Custom lengths available) | - |
| Material Grades | Grade 8.8, 10.9, 12.9 / ASTM A325 / AISI 304, 316 | ISO 898-1, ASTM F568M |
| Tensile Strength (Grade 10.9) | Min. 1040 MPa | ISO 898-1 |
| Proof Load (Grade 10.9) | 830 MPa | ISO 898-1 |
| Common Finishes | Plain, Zinc Plated, Hot-Dip Galvanized, Geomet (Dacromet), Black Oxide | ISO 4042, ASTM B633 |
Application Scenarios
The 19mm hex bolt is indispensable across a broad spectrum of heavy industries. Its primary role is to create high-strength, non-permanent connections that can withstand dynamic loads, vibration, and tension.
- Structural Steel Construction: Connecting beams, columns, and bracings in building frames, bridges, and industrial plants.
- Heavy Machinery & Equipment: Assembly of mining excavators, agricultural machinery, presses, and material handling systems.
- Transportation Infrastructure: Securing components in rail tracks, cargo container locks, and trailer assemblies.
- Energy & Utilities: Fastening in wind turbine towers, power generation equipment, and transmission line structures.
- Marine & Offshore: Used with appropriate stainless steel or hot-dip galvanized finishes for platforms, docks, and shipbuilding.
Advantages
Choosing our 19mm hex bolt provides tangible benefits that translate into project efficiency and long-term value.
- Enhanced Safety & Reliability: Consistent metallurgy and manufacturing processes ensure predictable failure points and a high safety margin, critical for load-bearing structures.
- Superior Corrosion Protection: Our advanced coating processes offer superior salt-spray resistance compared to standard plating, reducing maintenance and replacement costs.
- Global Compliance: Products are manufactured to internationally recognized standards (ISO, ASTM, DIN), facilitating their use in projects worldwide and simplifying procurement for multinational firms.
- Optimized Inventory: We offer a comprehensive range of grades and finishes from a single source, reducing your supplier base and streamlining your supply chain.
Why Choose Us
As a specialist manufacturer and global supplier of industrial fasteners, we are committed to being more than just a vendor. We are your technical partner in fastening.
- Deep Technical Expertise: Our engineering team can provide support on bolt selection, torque specifications, and corrosion prevention strategies for your specific application.
- Scalable, Consistent Supply: With advanced manufacturing facilities and stringent QC protocols, we guarantee consistent quality across small batches or large-volume container orders.
- Logistical Excellence: We have established partnerships with major global logistics providers to ensure reliable, on-time delivery to job sites, ports, or warehouses anywhere in the world.
- Competitive Value: By controlling the manufacturing process from raw material to finished product, we offer exceptional quality at highly competitive price points for B2B buyers.
FAQ
What is the difference between a Grade 8.8 and a Grade 10.9 19mm hex bolt?
The grade indicates the bolt's strength class. A Grade 10.9 bolt has a higher tensile and yield strength than a Grade 8.8 bolt. For example, a 10.9 bolt has a minimum tensile strength of 1040 MPa, while an 8.8 bolt offers 800 MPa. The choice depends on the design load and safety factor required for your application.
Can you supply 19mm hex bolts with specific thread lengths or special dimensions?
Yes. While we stock a wide range of standard lengths, we specialize in custom manufacturing. We can produce bolts to your exact specifications for thread length, underhead bearing surface, or non-standard dimensions with appropriate tooling lead times.
What finish do you recommend for an outdoor, coastal environment?
For highly corrosive environments like coastal areas, we strongly recommend hot-dip galvanizing (HDG) or a mechanical galvanizing process like Geomet® (Dacromet). These coatings provide a thick, sacrificial layer of zinc that offers superior long-term protection against rust compared to standard electroplated zinc.
Do your bolts come with certification?
Absolutely. We provide full material traceability and can supply Mill Test Certificates (MTCs) or Certificates of Conformity (CoC) compliant with EN 10204 3.1 standards upon request. This documentation is crucial for quality audits and compliance in regulated industries like construction and energy.
What is your typical lead time and minimum order quantity (MOQ)?
For standard items, we can often ship from stock or within 10-15 days. Custom orders typically require 4-6 weeks. We offer flexible MOQs to suit both large projects and smaller trial orders, facilitating a smooth start to our partnership.
Contact our sales team today for a competitive quotation, technical data sheets, or to discuss your specific requirements for a reliable 19mm hex bolt supply.
