M16 Hex Head Bolt

Gangtong Zheli professionally produces high-quality m16 hex head bolt. Our factory also provides customized services and free samples for you. The M16 hex head bolt is a standard hex head fastener with a nominal diameter of 16 millimeters.  It is widely used in critical applications requiring high connection strength, durability, and vibration resistance, such as heavy steel structures, bridge engineering, wind power generation, rail transportation, petrochemicals, and large-scale mechanical equipment. Its hexagonal head design facilitates efficient installation and removal using wrenches, sockets, or pneumatic tools, making it one of the most fundamental and reliable connecting elements in modern industrial assembly systems.

Gangtong Zheli m16 hex head bolt is manufactured in strict accordance with international and national standards such as ISO 4014, DIN 933, and GB/T 5782, ensuring precise dimensions, thread compatibility, and stable mechanical performance. Whether in static load or dynamic vibration environments, the M16 hex head bolt provides durable and secure connection assurance, making it an indispensable "industrial backbone" in the industrial sector.

Core Performance and Technological Advantages

Based on our over 10 years of experience in fastener R&D and mass production, combined with materials science, mechanical testing, and actual customer application scenarios, our M16 hex head bolts possess the following core advantages in design and manufacturing:

1. Multiple Materials and Strength Grades to Meet Diverse Needs

- Carbon Steel Series:

- Grade 8.8: Suitable for general industrial assembly, tensile strength ≥ 800MPa

- Grade 10.9: High-strength bolts, tensile strength ≥ 1040MPa, widely used in steel structures, bridges, and towers

- Grade 12.9: Ultra-high strength, tensile strength ≥ 1220MPa, suitable for high pre-tensioned connections (e.g., engines, pressure vessels)

- Stainless Steel Series:

- A2-70 (304 stainless steel): Resistant to general corrosion, suitable for indoor and outdoor environments

- A4-80 (316 stainless steel): Contains molybdenum, resistant to chloride ion corrosion, suitable for marine engineering, chemical, food and pharmaceutical industries

2. Precision Manufacturing Process Ensures Consistency and Reliability

- Cold Heading Forming: The head is formed in a single cold heading process, ensuring continuous metal flow lines and improving tensile and shear strength.

- Rolled Threads: High-precision rolling process is used, resulting in smooth, burr-free threads with a thread accuracy of 6g grade, ensuring perfect fit with nuts.

- Heat Treatment Control: Quenching and tempering treatment ensures a balance of strength and toughness, preventing brittle fracture, and complying with GB/T 3098.1 standard.

3. Standardized Design, Strong Compatibility, and Convenient Installation

- Head Size: Standard hex head (S=24mm), compatible with general tools

- Wide Length Range: Provides various standard lengths from 60mm to 400mm, and supports non-standard customization (e.g., full thread, fine thread M16×1.5)

- Thread Type: Coarse thread (M16×2.0) is the main type, fine thread is optional, meeting different locking requirements

4. Advanced Surface Treatment to Extend Service Life

- Carbon Steel Models Available:

- Cold Galvanizing: Environmentally friendly, salt spray test resistance ≥ 72 hours

- Dacromet: Chromium-free, environmentally friendly coating with corrosion resistance exceeding 500 hours and no risk of hydrogen embrittlement.

- Hot-dip galvanizing: Suitable for long-term outdoor exposure environments, with strong corrosion resistance.

- Stainless steel models: Naturally passivated, requiring no electroplating, environmentally friendly and providing long-lasting rust prevention.

5. Resistant to extreme environments and adaptable to complex working conditions

- Operating temperature range: -60°C to +350°C

- Excellent vibration and shock resistance, suitable for high-speed rotating equipment and buildings in earthquake-prone areas.

- Passed vibration tests, salt spray tests, and preload retention tests to ensure long-term stability.

Typical Application Scenarios

Our m16 hex head bolts have been successfully applied in numerous key national engineering and industrial projects:

Steel Structure Buildings: Steel beams, steel columns, and node plate connections, ensuring overall structural stability

Bridges and Tunnels: Supports, guardrails, embedded parts, and cable stay anchorages

Wind Power Generation: Tower flange connections, nacelle base fixing

Heavy Machinery: Excavator, crane, and road roller chassis connections

Power Transmission Towers and Substations: Transmission tower structures, transformer installation

Rail Transit: Rail fasteners, signal equipment, and vehicle bogie connections

Why choose our m16 hex head bolt?

Authoritative Certification, Traceable Quality

- Certified by ISO 9001, ISO 14001, and IATF 16949 (automotive grade) quality management systems

- Products comply with GB, DIN, ANSI, JIS, ISO and other international standards, and are exported to Europe, America, Southeast Asia, and the Middle East

- Each batch provides Mill Certificates, test reports, and certificates of conformity, enabling full lifecycle traceability

Owned Production Lines, Full-Process Quality Control

- Self-built cold heading, heat treatment, thread rolling, and surface treatment workshops, mastering core processes

- Equipped with professional equipment such as spectrometers, tensile testing machines, salt spray testing chambers, metallographic microscopes, and hardness testers

- Achieves full-process quality monitoring from raw material warehousing to finished product delivery

Professional Technical Support and Customer Service

- Provides CAD drawings, torque recommendation tables, installation specifications, and anti-loosening solutions

- Supports sample delivery, non-standard customization, OEM labeling, and bulk supply

- Professional technical team provides 24/7 online support to solve selection, installation, and usage problems

FAQ

Q1: What does "M16" in the m16 hex head bolt mean?

A: "M" stands for metric thread, and "16" indicates that the nominal diameter of the thread is 16 millimeters.

Q2: What is the difference between 10.9 grade and 12.9 grade bolts? A: Grade 10.9 has a tensile strength of ≥1040MPa, and Grade 12.9 has a tensile strength of ≥1220MPa. The latter has higher strength, but requires stricter control of installation torque and pre-tightening force.

Q3: Is it possible to customize full-thread or fine-pitch thread structures?

A: We support customization of M16×1.5 fine-pitch threads and full-thread versions. Please provide drawings or technical requirements.

Q4: How to prevent M16 bolts from loosening in a vibrating environment?

A: We recommend using spring washers, lock nuts, nylon locking rings, or thread locking adhesive.

Q5: What are the minimum order quantity and delivery time?

A: The minimum order quantity for standard products is 500 pieces. Samples are shipped in 3-5 days, and bulk orders in 7-15 days. Expedited production is available.