Cylinder O-Ring 3.099 ID (SKU 5257921), forged from ASTM D2000-20 Type 2 Class B1 NBR rubber with precision vulcanization (0.489"ID×0.070"CS), API 7K-compliant for mud pump cylinder liners, pressure differential ≥30MPa, salt spray tested 500h corrosion-free, ISO 3601-1/DIN 3771 certified, 40% dynamic sealing longevity enhancement.
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