RAYCHIN LIMITED, we are materials experts who focus only on fasteners made from the highest performance specialty metals for the most challenging and extreme applications.

• Stainless Steel Series: Martensitic Stainless Steel, Ferritic Stainless Steel, Austenitic Stainless Steel, Austenitic-Ferritic (Duplex) Stainless Steel and Precipitation Hardening Stainless Steel.

• Super Alloys Series: Nickel-based Alloy, Cobalt-based Alloy, Iron-based Alloy, Molybdenum-based Alloy, ‌Titanium-based Alloy, Copper based Alloy, ‌Zirconium Alloy.

• Alloy Steel Series: Low Alloy Steel, Medium Alloy Steel, High Alloy Steel, Special Alloy Steel.

Hook Bolts | J-Bolts & Custom Lifting Eye Bolts in Special Alloys | RAYCHIN Manufacturer

RAYCHIN manufactures hook bolts in 25+ alloys including Monel, Titanium & MP35N. J-bolts, lifting eye bolts & custom hook fasteners compliant with DIN, ISO, ASTM, ASME standards. Global supplier for marine, construction & material handling applications.

Hook Bolts for Secure Hanging, Lifting & Anchoring Applications

RAYCHIN is a specialized manufacturer of engineered hook bolts (commonly called J-bolts, lifting eye bolts, or anchor hooks) — versatile fasteners designed with a curved or angled end for hanging, lifting, anchoring, and securing applications. These critical components provide reliable attachment points in demanding environments where corrosion resistance, high strength, and durability are paramount. We manufacture these specialized fasteners from over 25 advanced alloys to meet rigorous requirements in marine, construction, material handling, renewable energy, and industrial equipment sectors globally.

Hook Bolt Types & Classifications

We manufacture comprehensive hook bolt configurations to address diverse technical requirements:

1. Standard Hook Bolts:

• J-Bolts: Feature a J-shaped hook end for concrete anchoring and structural connections, manufactured to DIN 444, ISO 3266, and ASME B18.2.1 standards.

• Eye Bolts (Lifting Eye Bolts): Designed with a circular eye for lifting applications, compliant with DIN 580, ISO 3266, ASTM A489, and BS 4278 specifications.

• Swivel Eye Bolts: Incorporate a rotating eye to prevent cable twisting during lifting operations per DIN 582 and ISO 3266 standards.

2. Special Application Hook Bolts:

• Shoulder Eye Bolts: Combine precision shoulder with lifting eye for machinery alignment and positioning applications.

• Screw Eye Bolts: Fully threaded with formed eye for adjustable anchoring points.

• Forged Hook Bolts: Heavy-duty hooks for marine mooring, crane applications, and structural anchoring.

• Custom Hook Designs: Manufactured to exact OEM specifications with unique hook radii, thread configurations, and special features.

Material Grades & International Standard Specifications

Our hook bolts are precision-engineered from the following advanced material systems with full international standard compliance:

1. Precipitation-Hardening Stainless Steels:

• 17-4 PH (UNS S17400): Supplied to ASTM A564 Type 630, AMS 5643, DIN 1.4542 in H900, H1025, H1150 tempers for high-strength marine hook bolts.

• PH 13-8 Mo (UNS S13800): Manufactured per ASTM A564 Type 625, AMS 5629 for superior corrosion resistance and strength.

2. Nickel-Based Superalloys:

• Inconel® Alloys: Inconel 718 (UNS N07718/AMS 5663), Inconel 625 (UNS N06625/ASTM B446), Inconel 600 (UNS N06600) for high-temperature industrial lifting applications.

• Monel® Alloys: Monel K500 (UNS N05500/AMS 4676), Monel 400 (UNS N04400) for marine hardware and offshore hook bolts.

• Hastelloy® Alloys: Hastelloy C276 (UNS N10276/ASTM B574), C22 (UNS N06022), B2 (UNS N10665) for severe chemical processing environments.

• Waspaloy (UNS N07001): Per AMS 5708, AMS 5824 for high-temperature aerospace applications.

• Nimonic® Series: Nimonic 80A (UNS N07080), Nimonic 90 (UNS N07090) compliant with BS HR 501/502 standards.

3. Duplex & Super Duplex Stainless Steels:

• Duplex Steel: Duplex 2205 (UNS S32205) to ASTM A193 B8S, EN 1.4462 specifications for offshore platform lifting eyes.

• Super Duplex Alloys: Alloy 926 (UNS N08926), AL-6XN® (UNS N08367) meeting ASTM A193 B8S, NACE MR0175.

4. Titanium Alloys:

• Grade 5 Titanium (Ti-6Al-4V): UNS R56400 per AMS 4928, ASTM F467 for lightweight marine lifting hooks.

• Grade 2 Titanium: UNS R50400 to ASTM B348, AMS 4921 for chemical processing hook bolts.

5. Refractory & Exotic Metals:

• Tantalum (UNS R05200): ASTM B365, AMS 7845 for chemical equipment lifting eyes.

• Zirconium 702 (UNS R60702): ASTM B550, ASME SB550 for acid handling applications.

• Molybdenum (UNS R03600) & Tungsten: For extreme temperature lifting applications.

6. Specialty Alloys:

• Nitronic® Alloys: Nitronic 60 (UNS S21800), Nitronic 50 (UNS S20910) to ASTM A193 B8N for high-strength, wear-resistant hooks.

• High-Performance Stainless: 254 SMO (UNS S31254/EN 1.4547), 310SS (UNS S31000), Alloy 20 (UNS N08020), Alloy 330 (UNS N08330).

• Cobalt Alloys: MP35N (UNS R30035/AMS 5844), MP159 (AMS 5846) for ultra-high strength lifting eye bolts.

• Iron-Based Superalloy: A286 (UNS S66286) to AMS 5731, ASTM A453 Grade 660.

7. Aluminum Alloy:

• Aluminum 7075 (UNS A97075): AMS QQ-A-225/9, ASTM F467 in T6, T73 tempers for lightweight aerospace lifting points.

8. Pure Nickel & Incoloy:

• Nickel 200 (UNS N02200): ASTM B160, ASME SB160.

• Incoloy® Alloys: Incoloy 825 (UNS N08825), Incoloy 925 (UNS N09925).

Custom Hook Bolt Manufacturing Services

RAYCHIN provides complete custom hook bolt manufacturing from your technical specifications:

• Standards Compliance: DIN 444, DIN 580, ISO 3266, ASTM A489, ASME B18.2.1, and customer drawings.

• Special Features: Safety latches, thread locking features, special eye geometries, shouldered designs, heat-treated sections.

• Load Ratings: Working Load Limit (WLL) certification, Proof Load testing, Destructive testing available.

• Surface Treatments: Hot-dip galvanizing, electroplating, XYLAN coatings, passivation, electropolishing.

• Full Processing: Hot forging, CNC machining, thread rolling, heat treatment, bending/forming, surface finishing.

• Quality Assurance: Complete MTRs (EN 10204 3.1), load testing certification, non-destructive testing, compliance with ISO 9001, DNV, ABS, Lloyd's Register.

Industry Applications

• Marine & Offshore: Mooring systems, lifting points, deck hardware (ABS, DNV, LR certified)

• Construction & Infrastructure: Concrete anchoring, structural connections, curtain wall systems

• Material Handling: Crane attachments, hoist points, rigging hardware

• Renewable Energy: Wind turbine components, solar panel mounting, hydroelectric equipment

• Industrial Equipment: Machinery lifting points, process equipment, tank farm installations

• Transportation: Cargo securing, vehicle lifting points, trailer attachments

Why Choose RAYCHIN?

• Forging Expertise: Hot forging capabilities for high-strength hook geometries

• Load Rating Experience: Extensive experience with WLL certification and load testing

• Marine Certification: Products certified to DNV, ABS, Lloyd's Register standards

• Material Specialization: 25+ years working with corrosion-resistant hook bolts

• Custom Engineering: Design optimization for specific load requirements

• Global Supply: Reliable supplier to North America, Europe, Asia-Pacific, Middle East markets

Request Hook Bolt Quotation
Contact RAYCHIN for engineering consultation and competitive pricing. Submit your drawings for J-bolts, lifting eye bolts, or custom hook fasteners.

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