Pony Rod Oil Seal (SKU:145-200212-503) Composed of ASTM D2000-22 NBR rubber (Oil Resistance Class 2) bonded to 304SS core via vulcanization, Shore A 70±3 hardness, temperature range -30°C~120°C. Electroplated layer ≥15μm (GB/T 9799), API 7K compatible for mud pump pony rods, compressive strength ≥80MPa, salt spray tested >1200hrs corrosion-free
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