u3 and u2 marine anchor chain 1.Material: U1, U2, U3 2. Type: Open ... and Stud 3. Certificates:CCS, ABS, etc. u3 and u2 marine anchor chain Originally studs were added to the chain to ... Anchor, U.S.N Stockless Anchor and other marine castings, like Panama Chock, Fairlead Roller, and so on. With ISO: 9001 Quality Management ...