This grade S4 chain is made to G4 (G43 ISO) chain dimensions (not specifications), and has shorter links than NACM G43 chain - see our website for all the relevant specifications. Check fit or contact your windlass manufacturer before purchase. Depending on the size of the chain, it has approximately 80 to 100% of the strength of comparable galvanized high test chain.
• Fits most common windlass gypsies
• Complies with U.S. National Association of Chain Manufacturers (NACM) specifications