KingChain 559881 Grade 30 (G30) Proof Coil Chain - amazon.com
Grade 30 chain is an excellent general purpose, low carbon utility chain. The chain is manufactured to NACM standards. Each link is proof tested two times and the break load is 4 times the Safe Workload (design factor 4:1). It is recommended for applications that do not require high strength-to-weight ratios.
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