Needle Valve, Hard Seat, 1 NPT Female - 1 NPT Female, 316 SS, 0.438" Orifice, EPDM 80 O-Ring, Panel Mount (1 nut), Noshok, Mfr#: 408-FFS-EM1-PM1

100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability. Blow-out proof stem provides a secondary stem seal in the full open position. FKM o-ring seal and PTFE back-up ring below the stem threads to protect from corrosion and galling; PTFE or Graphite packing optional certain NPT sizes only.