Eye Bolts
- Home
- Exotic Metal Fasteners
- Eye Bolts
Sunmach specializes in manufacturing premium Duplex Eye Bolts designed to provide maximum structural safety and unmatched load-bearing reliability in the most severe industrial rigging and marine lifting operations. Unlike lower-grade cast alternatives that are prone to sudden brittle failure under dynamic tension, our hot-forged eye bolts feature a continuous, uniform grain flow around the entire structural loop to eliminate internal stress concentrations. These high-integrity fasteners distribute lifting forces evenly across heavy machinery, ensuring workplace safety and secure transport during critical heavy-equipment positioning. For versatile or highly specialized environments, we also produce high-performance Stainless Steel Eye Bolts tailored to resist environmental degradation and temperature swings. These premium lifting fasteners are engineered to handle high-tensile pulling forces across marine cargo decks, active chemical pipelines, and power plant assemblies. Backed by rigorous load validation and complete batch traceability, Sunmach ensures zero-failure performance and structural security for mission-critical rigging worldwide.
Duplex Eye Bolts
Sunmach is a leading manufacturer of premium Eye Bolts including both Duplex Eye Bolts and Stainless Steel Eye Bolts, engineered for lifting, rigging, and critical fastening applications. Our ISO 9001:2015 certification reflects our commitment to superior quality and consistent excellence in every eye bolt manufactured.
DUPLEX EYE BOLTS MATERIAL SPECIFICATIONS: Manufactured from high-performance duplex stainless steel grades including Duplex S31803 (PREN 35+) standard duplex grade, Duplex S32205 for enhanced performance, and Super Duplex S32750 (PREN 42+) for extreme environments, providing yield strength of 450 MPa minimum and tensile strength of 620 MPa minimum.
STAINLESS STEEL EYE BOLTS MATERIAL OPTIONS: Our Stainless Steel Eye Bolts feature multiple austenitic stainless grades including SS 304L (general corrosion resistance), SS 316L (enhanced molybdenum for superior corrosion resistance), SS 310 and SS 310H (high-temperature applications), SS 347H (stabilized stainless), 904L Stainless Steel (ultra-high corrosion resistance), Nitronic® 50 and Nitronic® 60 (special stainless grades), and 254 SMO (super austenitic stainless).
ENGINEERING & PRECISION MANUFACTURING: Our eye bolts are manufactured with advanced hot forming technology ensuring proper eye geometry for safe load handling, precise dimensional accuracy, complete material integrity, superior fatigue resistance, and reliable performance in lifting operations.
APPLICATIONS
Lifting and rigging operations, Suspension systems, Load-bearing assemblies, Marine equipment, Offshore structures, Industrial machinery, Heavy equipment, Critical load-bearing applications.
QUALITY & SAFETY
Material verification, Mechanical property testing, Dimensional inspection (CMM certified), Visual inspection, Load testing (upon request), Complete traceability documentation.
Sizes
| Metric : | M6 to M64 |
| Imperial : | 1/4" to 2.5" |
| MOQ : | 1 Piece & Above |
| Certification : | EN 10204 3.1, EN 10204 3.2 (On Demand) |
Specification
| Bolt | DIN | ISO | ANSI | IS |
|---|---|---|---|---|
| Eye Bolts | 580 | 8821 | B18.12 | - |
Frequently Asked Questions
Common questions about Sunmach Duplex Eye Bolts
Premium Duplex Eye Bolts provide nearly double the mechanical load capacity and fatigue resistance compared to traditional cast alternatives, preventing the lifting loop from stretching or snapping under peak tensile loads.
Industrial Duplex Eye Bolts are specified for highly corrosive marine and offshore rigging environments where equipment is continuously exposed to saltwater splash, blocking severe chloride stress-corrosion cracking.
Stainless Steel Eye Bolts offer a versatile and cost-effective solution for secure material handling in damp or chemical-heavy process zones, developing a self-healing protective surface oxide layer.
Our eye bolts are manufactured using advanced hot forging rather than casting to preserve a continuous, unbroken metal grain flow around the loop, ensuring no unpredictable, brittle failure under maximum weight loads.
All eye bolts are shipped with official EN 10204 3.1 Mill Test Certificates (MTC) linking each piece to its original raw material melt, ensuring full compliance with international safety standards.