Screw Pin Anchor Shackle


About product

  • Meets U.S. Fed. Spec. RR-C-271D, TYPE 4A, GRADE A, CLASS 2, and ASME B30.26 standards
  • Heat-treated carbon steel bows, quenched and tempered with alloy pins
  • Made with a forged carbon steel body for exceptional strength
  • Available in sizes from 3/16” to 2 1/2” and capacities from 1/3 ton to 55 tons

Screw Pin Anchor Shackle Drawing

screw pin anchor shackle

Additional information


carbon steel

Design Factor


Proof Load


Ultimate Load


Product Detail

Our Screw Pin Anchor Shackles are meticulously designed to meet the rigorous standards set by U.S. Federal Specification RR-C-271D, TYPE 4A, GRADE A, CLASS 2, as well as ASME B30.26. These shackles feature heat-treated carbon steel bows that undergo quenching and tempering processes, ensuring exceptional strength and reliability. The alloy pins further enhance their durability. With a hot-dip galvanized finish, these shackles offer outstanding resistance against corrosion, making them suitable for various environments. The design factor of 6:1 provides an added layer of safety during lifting operations. Each shackle is stamped with size, Working Load Limit (WLL), and trace code for easy identification and traceability. Available in a wide range of sizes, from 3/16” to 2 1/2”, and capacities ranging from 1/3 ton to 55 tons, our Screw Pin Anchor Shackles offer versatility to suit diverse lifting requirements.

Screw Pin Anchor Shackle Parameter

3/16" Screw Pin Anchor Shackle0.333/161/40.930.390.590.64
3/8" Screw Pin Anchor Shackle1.003/87/161.410.690.981.01
1/2" Screw Pin Anchor Shackle2.001/25/81.830.831.181.25
3/4" Screw Pin Anchor Shackle4.753/47/82.761.241.781.98
1" Screw Pin Anchor Shackle8.5011-1/83.691.752.352.66
1-1/4" Screw Pin Anchor Shackle12.01-1/41-3/84.632.123.013.15
1-3/8" Screw Pin Anchor Shackle13.51-3/81-1/25.172.303.323.60
1-3/4" Screw Pin Anchor Shackle251-3/427.062.964.234.99
2-1/2" Screw Pin Anchor Shackle552-1/22-3/410.254.005.757.00
Know Who We Are

About our company

Zava Marine Corporation is a leading supplier of marine parts and components. With a strong focus on quality and customer satisfaction, we specialize in providing a comprehensive range of high-quality marine equipment and accessories. Our products include deck equipment, ship accessories, and various other essential components needed for smooth maritime operations.

With a global presence, we serve a diverse customer base, including shipbuilders, shipowners, offshore operators, and marine equipment distributors. We are committed to providing exceptional service and tailored solutions to meet our customers’ unique needs.


Zava Marine offers a comprehensive range of certifications for marine parts in accordance with international standards and regulations. These certifications include those provided by renowned marine classification societies such as Lloyd’s Register (LR), Bureau Veritas (BV), China Classification Society (CCS), Registro Italiano Navale (RINA), American Bureau of Shipping (ABS), Nippon Kaiji Kyokai (NK), and Det Norske Veritas – Germanischer Lloyd (DNV-GL). By collaborating with these esteemed societies, Zava Marine ensures that our certified marine parts meet the highest standards of safety, quality, and performance, instilling confidence in our reliability and compliance within the maritime industry.

The warranty provided by Zava Marine covers defects in materials and workmanship for a period of two years from the date of purchase. During this warranty period, if any marine parts purchased from Zava Marine exhibit issues or failures resulting from manufacturing defects or faulty materials, Zava Marine will take responsibility for repair or replacement of the affected parts. 

Zava Marine has recently opened new molds for European and North American clients, utilizing materials such as metal, ABS, PVC, and more. These successful mold opening projects allow us to provide customized marine parts and components that meet the specific requirements of our clients in these regions.

Typically, Zava Marine can ship samples within 7 days once the product drawing has been mutually confirmed by both parties. This efficient process ensures that customers can receive samples promptly, allowing them to assess the quality and suitability of the products.

Zava Marine frequently utilizes a wide range of materials in our projects. These materials include aluminum, stainless steel, carbon steel, copper, plastics, titanium, and PEEK (Polyether Ether Ketone). Each material offers unique properties and characteristics suitable for various marine applications. 

Yes, we provide customization services for marine parts. We understand that every project and application may have unique requirements, and we are committed to delivering tailored solutions. By collaborating closely with our clients, we can adapt our products to specific specifications, ensuring optimal fit, performance, and compatibility. Whether it’s modifying existing designs or creating entirely new parts, our customization services cater to the diverse needs of the maritime industry.

Absolutely! We offer product design and development services to support our clients’ needs. Our experienced team of engineers and designers can collaborate with clients from concept development to final product realization. By leveraging our expertise in marine engineering and design, we can provide valuable insights and innovative solutions. Whether it’s optimizing existing designs or creating entirely new products, we are equipped to assist clients in bringing their ideas to life efficiently and effectively.

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Zava Marine