Stainless steel Luer lock needle with 1-piece PEEK fingertight nut and ferrule. Used for priming pump check valves and cleaning HPLC flow cells. Requires syringe 046-00038-01. For higher pressure fittings, use stainless steel nut 228-16001-00 and ferrule 228-16000-17, or high pressure (12,000 psi) PEEK fingertight 220-91522-07.