Screw Jack 1in-8 UNC 1 4in Long Swivel Cup

The Screw Jack 1in-8 UNC 1 4in Long Swivel Cup is a precision lifting and support tool engineered for serious automotive work, from suspension service to transmission removal and engine bay access. Whether you're a professional mechanic running a shop or an enthusiast tackling frame-off restorations, this screw jack delivers the controlled vertical travel mechanics depend on when hydraulic lifts aren't practical. The 1-inch diameter screw shaft with 8 threads-per-inch (UNC) pitch provides fine mechanical advantage, allowing gradual, stable load positioning without sudden drops—critical when working under a vehicle or supporting critical components.

Constructed with a swivel cup design, this jack accommodates uneven or angled contact surfaces commonly encountered during frame, transmission, and subframe work. The swivel action prevents binding and distributes load across the component's bearing surface, reducing risk of damage to painted or finished parts. At 1 4 inches in overall length, this tool offers compact maneuverability in tight engine compartments and under-car spaces while maintaining adequate stroke for typical lift operations. The 0.7-pound weight makes it portable and easy to position, yet the solid UNC thread form and steel construction ensure reliability under sustained load—a fundamental requirement when supporting thousands of pounds during suspension or drivetrain service.

This screw jack is ideal for transmission drops, differential service, engine block work, and any task requiring controlled vertical adjustment without impact loading. Professional technicians appreciate the mechanical precision of UNC threads for repeatable positioning, while restorers value the swivel cup's ability to work safely with fragile or restored bodywork. Pair this with jack stands and a proper work platform for maximum safety, and ensure all connection points are secure before applying load. Compatible with standard automotive support equipment, this jack integrates seamlessly into any serious mechanic's toolkit for restoration, repair, and modification projects.