PRODUCT CODE 18: ROTR and ROTRN Lock Mandrel with Safety Spring for LANDING NIPPLES.
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Rebco Lock Mandrels with Safety Spring and Shear Pin(s) feature holds the Key Expander Sleeve locked under flowing conditions.
Lock Mandrels (PRODUCT CODE 18) in addition to Safety Spring and Shear Pin(s), have Expander Sleeve and Key Retainer different than the ones used in Product Code 10 Lock Mandrels.