DIN 766 Chain is a calibrated short link chain manufactured to the dimensional requirements specified in DIN 766. The standard defines chain pitch, inside width, outside dimensions, and calibration tolerances, allowing the chain to operate correctly with windlasses manufactured to the same specification. Because of its standardized dimensions, DIN 766 chain has become one of the most commonly used metric anchor chains for marine windlass systems.

The chain is manufactured from Grade 3 carbon steel or AISI 316 stainless steel, depending on the application and corrosion requirements. Carbon steel chains are commonly supplied with hot-dip galvanized, zinc plated, black painted, or self-color finishes, while stainless steel chains provide additional corrosion resistance for long-term marine service.

Standard chain sizes range from 6 mm to 26 mm and are suitable for anchor systems on yachts, sailing boats, fishing vessels, workboats, pontoons, and marina facilities. Every production batch undergoes dimensional calibration, weld inspection, proof load testing, and mechanical property verification before delivery. The chain is intended for anchoring, mooring, barrier, and general marine applications and must not be used for overhead lifting.

Product Features

• Manufactured to DIN 766 calibrated dimensions

• Grade 3 carbon steel or AISI 316 stainless steel

• Sizes from 6 mm to 26 mm

• Compatible with DIN 766 metric windlass gypsies

• Available in hot-dip galvanized, zinc plated, black painted, or self-color finish

• Calibrated, proof tested, and individually inspected

• Suitable for anchoring and marine mooring applications

Grade of Chain: DIN 766 (German Institute for Standardization), this standard is for calibrated and tested chains using Grade 3 material. ISO 4565 (International Organisation for Standardisation) or EN 24565 or BS 7160

Working Load Limit (WLL): (rated capacity) Is the maximum working load that should be applied In direct tension to an undamaged straight length of chain.

Proof Test: (manufacturing test force) Is a term designating the minimum tensile force which has been applied to a chain under a constantly increasing force In direct tension during the manufacturing process. These loads are manufacturing integrity tests and shall not be used as criteria for service or design purpose.

Minimum Breaking Force: The minimum force at which the chain during manufacture has been found by testing to break when a constantly increasing force is applied in direct tension. Breaking force values are not guarantees that all chain segments will endure these loads. This test is a manufacturer’s attribute acceptance test and SHALL NOT be used as criteria for service and design purpose.

Overhead Lifting: The process of lifting that would elevate a freely suspended load to such a position that dropping a load would present a possibility of bodily injury or Property damage.

Name: DIN 766 Chain Marine-Grade Windlass Chain

MOQ: 100 Meters

Package: Steel Drum / Wooden Box / Steel Pallet / Bulk Packing

Manufacturing Standards: Manufactured in accordance with DIN 766, ISO 4565, EN 24565, and BS 7160 dimensional requirements for calibrated marine anchor chains. Products are manufactured using Grade 3 carbon steel or AISI 316 stainless steel with calibrated short link construction for compatibility with metric anchor windlass systems.

Testing Standards: Each chain undergoes proof load testing, dimensional calibration, visual inspection, weld inspection, mechanical property verification, and minimum breaking force testing during production. Proof testing is performed under controlled tensile loading to verify manufacturing integrity. Breaking load values are determined through destructive testing for batch verification and are not intended as service load limits. Inspection records and traceability documentation are available upon request.

Application Standards: Suitable for anchor windlass systems, marine anchoring, yacht anchoring, fishing vessels, workboats, pontoons, marina facilities, barrier chains, security applications, and general non-overhead marine uses. The chain is not designed or certified for overhead lifting or suspended load applications.

Maintenance Standards: Inspect the chain regularly for corrosion, wear, elongation, cracked welds, deformed links, coating damage, and dimensional compatibility with the windlass gypsy. Chains showing excessive wear, permanent deformation, or damaged welds should be removed from service. For galvanized chains, inspect the coating condition periodically and replace worn sections as required to maintain reliable anchoring performance.