NOVELTY - The connector has a reinforcement insert (200) comprising portions proximal to insert ends. The portions comprise interior threaded sections proximal to ends of the portions, and interior non-threaded sections connected to interior threaded sections, other non-threaded sections connected to the former non-threaded sections. A middle portion is arranged between the portions. A biocompatible molding covers the latter non-threaded sections and the interior surface of the middle portion. The molding defines a molded material passageway (268) through the portions.    USE - Biocompatible connector for use in fittings or assemblies e.g. union, tee, cross and manifold of a AI system (all claimed) e.g. liquid chromatography such as HPLC, ultra HPLC, ion chromatography, gas chromatography, mass spectrometry, microflow chromatography, nanoflow chromatography, nano-scale liquid chromatography, capillary electrophoresis, reverse-phase gradient chromatography system, lab on a chip, printing, sensors, micro chromatography, biochemical detection, biological sensing, drug discovery, drug delivery, molecular separation, proteomics, fuel cells, optics and opto-fluidics, and research tools. Can also be used for adapter and valve in AI system.    ADVANTAGE - The reinforcement insert is made of stainless steel, thus providing structural strength to the connector. The middle portion is in the shape of a groove, thus helping an operator to couple a spanner to the reinforcement insert. The biocompatible molding is made of PEEK (RTM: colorless organic thermoplastic polymer), thus providing high degree of chemical inertness and biocompatibility. The connector utilizes biocompatible union made of the reinforcement material, thus minimizing shearing damage to the molded material, and hence preventing damage to the biocompatible union due to over-tightening or repeated tightening cycles. The connector utilizes a biocompatible tube to provide the molded material passageway, thus eliminating deburring operations during machining molded material passageways. The connector allows providing the reinforcement insert with injection holes of different diameters, thus providing flexibility in controlling the flow of material into a particular area of the reinforcement insert during molding.    DETAILED DESCRIPTION - The reinforcement insert is made of ceramic and steel. INDEPENDENT CLAIMS are also included for the following:    (1) an analytical instrument (AI) system    (2) a method for manufacturing a biocompatible connector.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a biocompatible connector.    Tubing (103)    Fitting (104)    Reinforcement insert (200)    Molded material passageway (268)    Exterior geometry of union (271)