Seal Housing O-Ring (SKU:001500421) Made from ASTM D2000-22 NBR 70±5A rubber (Oil Resistance Class 2), three-stage vulcanization (140°C×30min+160°C×60min+180°C×90min), compression set ≤15% (GB/T 528-1998). API 7K compliant for mud pump seal housing, UNF 3A thread accuracy ±0.001", salt spray tested >1000hrs corrosion-free. Operational temp -30°C~120°C.
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