Inch hydraulic connector BB 9/16' ORFS (UNF) ORFS (UNF) WaryńskiInch hydraulic connector BB 9/16' ORFS (UNF) ORFS (UNF) Waryński. The fasteners were designed and manufactured in accordance with applicable standards, which describe in detail the quality and dimensional requirements. They are compatible with fasteners from other renowned power hydraulics manufacturers.