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Amazon.com: AC PERFORMANCE Aluminum -6 AN Male to 1/4" NPT Thread with 1/8" NPT Sensor Gauge/Gage Port Fitting Pressure Take Off Adaptors, Black : Automotive
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Vent/Drain Bleeder, Stainless Steel, 1/4" NPT male port. Tapped hole in knob. Oxy clean. #46233OX-TH
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