Product Description Specifications 1/8" NPT Female to Male compression fitting thread designed for AutoMeter 1/8" Nylon or Copper Tubing. Use to connect AutoMeter 1/8" Nylon or Copper tubing to AutoMeter Mechanical gauges. Category: Gauges & Pods>Gauges Core: N LTL: N MPN: 3272 Proposition 65: N Special Order: Y