SPRING SEAL RETAINER (SKU M01643A000), cold-wound from ASTM A228 music wire with hard chrome plating (≥50μm thickness per API 7K mud pump sealing standards), hardness HRC 45-50, fits 3.5" hardened chrome liners, 500h salt spray corrosion-free, dynamic load ≥1200N, compatible with F.E. Myers Du-All plunger pumps.
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