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Turned Eye Bolts are precision-machined fasteners designed to provide a secure anchoring point for lifting, rigging, and load-bearing applications. Unlike bent eye bolts, these are manufactured through machining or forging processes to ensure uniform grain structure, higher strength, and dimensional accuracy. Commonly produced in stainless steel, carbon steel, and alloy steel grades, they conform to standards such as DIN 444, ASTM A193, and ISO specifications.
These fasteners play a critical role in industries like construction, marine, oil & gas, and heavy equipment manufacturing, where safe load handling is non-negotiable. Their threaded shank allows secure installation into tapped holes or with nuts, making them versatile for both permanent and temporary setups.
KK Fasteners supplies turned eye bolts to global markets with strict material traceability, ensuring consistent performance across demanding industrial environments.
| Material | Stainless Steel (SS 304, SS 316, SS 316L), Carbon Steel, Alloy Steel |
| Grade | ASTM A193 B7, B8, B8M, DIN 1.4301, 1.4401 |
| Size Range | M6 to M64 / 1/4" to 2-1/2" |
| Thread Type | Metric (ISO), UNC, UNF, BSW |
| Standards | DIN 444, ISO 3266, ASTM A193, BS 4278 |
| Surface Finish | Plain, Zinc Plated, Hot Dip Galvanized, PTFE Coated, Black Oxide |
| Type Variants | Full Thread, Partial Thread, Shoulder Type |
| Tensile Strength | Up to 800 MPa (Material dependent) |
| Length (B) | Outside Eye Diameter (C) | Inside Eye Diameter (D) | Overall Length* (E) | Thread Length* (F) |
|---|---|---|---|---|
| 1/4"-20 (A) | ||||
| 2" | 1" | 1/2" | 3-7/32" | 1-1/2" |
| 3" | 1" | 1/2" | 4-7/32" | 1-1/2" |
| 4" | 1" | 1/2" | 5-7/32" | 2" |
| 5" | 1" | 1/2" | 6-7/32" | 2-1/2" |
| 6" | 1" | 1/2" | 7-7/32" | 3" |
| 5/16"-18 (A) | ||||
| 2-1/4" | 1-1/4" | 5/8" | 3-23/32" | 1-1/2" |
| 3-1/4" | 1-1/4" | 5/8" | 4-23/32" | 1-1/2" |
| 4-1/4" | 1-1/4" | 5/8" | 5-23/32" | 2-1/2" |
| 5" | 1-1/4" | 5/8" | 6-15/32" | 2-1/2" |
| 6" | 1-1/4" | 5/8" | 7-15/32" | 3" |
| 3/8"-16 (A) | ||||
| 2-1/2" | 1-1/2" | 3/4" | 4-1/4" | 1-1/2" |
| 3" | 1-1/2" | 3/4" | 4-3/4" | 1-1/2" |
| 4" | 1-1/2" | 3/4" | 5-3/4" | 2" |
| 4-1/4" | 1-1/2" | 3/4" | 6" | 2" |
| 4-1/2" | 1-1/2" | 3/4" | 6-1/4" | 3" |
| 5" | 1-1/2" | 3/4" | 6-3/4" | 3" |
| 6" | 1-1/2" | 3/4" | 7-3/4" | 3" |
| 8" | 1-1/2" | 3/4" | 9-3/4" | 4" |
| 10" | 1-1/2" | 3/4" | 11-3/4" | 4" |
| 1/2"-13 (A) | ||||
| 2" | 2" | 1" | 4-3/16" | 1-5/8" |
| 3-1/4" | 2" | 1" | 5-7/16" | 2" |
| 4" | 2" | 1" | 6-3/16" | 3" |
| 4-1/2" | 2" | 1" | 6-11/16" | 3" |
| 6" | 2" | 1" | 8-3/16" | 3" |
| 8" | 2" | 1" | 10-3/16" | 4" |
| 10" | 2" | 1" | 12-3/16" | 4" |
| 12" | 2" | 1" | 14-3/16" | 4" |
| 5/8"-11 (A) | ||||
| 4" | 2-1/2" | 1-3/8" | 6-5/8" | 3" |
| 4-1/2" | 2-1/2" | 1-3/8" | 7-1/8" | 3" |
| 6" | 2-1/2" | 1-3/8" | 8-5/8" | 3" |
| 8" | 2-1/2" | 1-3/8" | 10-5/8" | 4" |
| 10" | 2-1/2" | 1-3/8" | 12-5/8" | 4" |
| 12" | 2-1/2" | 1-3/8" | 14-5/8" | 4" |
| 15" | 2-1/2" | 1-3/8" | 17-5/8" | 6" |
| 18" | 2-1/2" | 1-3/8" | 20-5/8" | 6" |
| 24" | 2-1/2" | 1-3/8" | 26-5/8" | 6" |
| 3/4"-10 (A) | ||||
| 4" | 2-13/16" | 1-1/2" | 6-7/8" | 3" |
| 4-1/2" | 2-13/16" | 1-1/2" | 7-3/8" | 3" |
| 6" | 2-13/16" | 1-1/2" | 8-7/8" | 3" |
| 8" | 2-13/16" | 1-1/2" | 10-7/8" | 4" |
| 10" | 2-13/16" | 1-1/2" | 12-7/8" | 4" |
| 12" | 2-13/16" | 1-1/2" | 14-7/8" | 4" |
| 15" | 2-13/16" | 1-1/2" | 17-7/8" | 6" |
| 18" | 2-13/16" | 1-1/2" | 20-7/8" | 6" |
| 24" | 2-13/16" | 1-1/2" | 26-7/8" | 6" |
| 7/8"-9 (A) | ||||
| 5" | 3-1/2" | 1-3/4" | 8-1/4" | 3" |
| 6" | 3-1/2" | 1-3/4" | 9-1/4" | 3" |
| 8" | 3-1/2" | 1-3/4" | 11-1/4" | 4" |
| 10" | 3-1/2" | 1-3/4" | 13-1/4" | 4" |
| 12" | 3-1/2" | 1-3/4" | 15-1/4" | 4" |
| 18" | 3-1/2" | 1-3/4" | 21-1/4" | 6" |
| 24" | 3-1/2" | 1-3/4" | 27-1/4" | 6" |
| 1"-8 (A) | ||||
| 6" | 4" | 2" | 9-5/8" | 3" |
| 8" | 4" | 2" | 11-5/8" | 4" |
| 10" | 4" | 2" | 13-5/8" | 4" |
| 12" | 4" | 2" | 15-5/8" | 4" |
| 15" | 4" | 2" | 18-5/8" | 6" |
| 18" | 4" | 2" | 21-5/8" | 6" |
| 24" | 4" | 2" | 27-5/8" | 6" |
| 1-1/4"-7 (A) | ||||
| 6" | 4-7/16" | 2-3/16" | 10-1/2" | 3" |
| 8" | 4-7/16" | 2-3/16" | 12-1/2" | 4" |
| 12" | 4-7/16" | 2-3/16" | 16-1/2" | 4" |
| 18" | 4-7/16" | 2-3/16" | 22-1/2" | 6" |
| 24" | 4-7/16" | 2-3/16" | 28-1/2" | 6" |
| 1-1/2"-6 (A) | ||||
| 6" | 5-3/16" | 2-1/2" | 11-1/4" | 3" |
| 12" | 5-3/16" | 2-1/2" | 17-1/4" | 4" |
| 18" | 5-3/16" | 2-1/2" | 23-1/4" | 6" |
| 24" | 5-3/16" | 2-1/2" | 29-1/4" | 6" |
| 2"-4-1/2 (A) | ||||
| 12" | 6-7/8" | 3-1/4" | 19" | 4" |
| * Overall length and thread length for imported eye bolts are approximate. Their values may differ from those listed in this table. | ||||
Turned eye bolts are used wherever a secure lifting or anchoring point is required for heavy loads, structural components, or rigging assemblies.
Turned eye bolts are produced using CNC machining or hot forging processes, followed by thread rolling or cutting for precise engagement. Each batch undergoes dimensional inspection using calibrated gauges to ensure compliance with DIN and ISO tolerances.
Mechanical testing, including tensile strength and hardness verification, confirms performance under load conditions. Surface finish is inspected for coating thickness and uniformity, especially in galvanized or PTFE-coated variants.
At KK Fasteners, every production lot is traceable to raw material heat numbers, with quality systems aligned to ISO 9001 standards, ensuring consistent product reliability across global shipments.
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Turned eye bolts are precision-machined fasteners featuring a circular loop (eye) on one end and a threaded shank on the other. They are designed to provide secure lifting or anchoring points in structural, rigging, and mechanical applications where consistent load handling and dimensional accuracy are required.
The best material depends on the environment and load requirements. Stainless steel (SS 316) is preferred for marine and corrosive conditions, while SS 304 suits general industrial use. Carbon steel offers high strength at a lower cost, and alloy steel is ideal for high-temperature or high-pressure applications.
Turned eye bolts are typically manufactured according to standards such as DIN 444, ISO 3266, ASTM A193, and relevant BS specifications. These standards define dimensions, thread types, and mechanical properties to ensure safe and consistent performance across industrial applications.
Choosing the right turned eye bolt depends on load capacity, installation method, and environmental exposure. Shoulder-type eye bolts are recommended for angular lifting, while straight shank types are suitable for vertical loads. Material selection should align with corrosion resistance and strength requirements.
A reliable supplier should offer ISO-certified manufacturing, full material traceability, and documented quality testing. Evaluate their experience in global supply, ability to meet standards, and customization capabilities. KK Fasteners supports international buyers with consistent quality and export documentation.
Precision, traceability, and compliance define the performance of turned eye bolts in critical applications. With controlled manufacturing processes and global supply experience, KK Fasteners ensures consistent quality across every shipment. For project-specific requirements or bulk inquiries, request a quote or connect with the engineering team to discuss specifications and delivery timelines.
