AMPCO SX20000004 Stub Shaft is a direct replacement part for AMPCO LF 757 seal applications, sized for 250TC and 280TSC configurations. Internal cross-references map the 1320000004 designator to SX20000004, confirming its role as the LF 757 shaft used with 250TC/280TSC seals. Catalog listings from AMPCO Pumps and distributors describe SX20000004 specifically as the LF 757 stub shaft for 250TC/280TSC, making it the correct repair part for LF757 pumps.
