Washer Seal Holder for FMC Bean L Series (1281655) Precision-stamped from ASTM A240 316 stainless steel with electropolished surface Ra≤0.2μm, API 7K compliant for FMC L1122D/L1122B mud pumps, hardness ≥250HV, 1000h salt spray test corrosion-free, ensuring fluid end sealing system stability。
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