100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability.
Needle Valve, Hard Seat, 7/16-20 UNF 2B Female - 7/16-20 UNF 2B Female, 316 SS, 0.Needle Valve, Hard Seat, 1/4 NPT Female - 1/4 NPT Female Angle, Steel, 0.187" Orifice, Panel Mount (2 nuts), 1-3/8 Phenolic Handle 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. Orifice, EPDM 80 O-Ring.