O-RING 353 (SKU P508542), forged from ASTM D2000-20 Type 2 Class B1 NBR rubber with precision vulcanization process, API 7K-compliant for mud pumps, temperature resistance -25℃~100℃, pressure differential ≥30MPa, salt spray tested 500h corrosion-free, ISO 3601-1/DIN 3771 certified.
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