We are offering screw jack with u head: screw jack with u head works as a traditional screw jack, with the u-head provides a platform to rest the beams. Features: equipped with die forged nut with socket for the frame pipe installation, and a u head is welded at one endsurface finish: hot dipped galvanisedproduct can also be made per customer specified sizesscaffolding screw jack can be in solid screw thread and hollow screw thread in outer diameter of 28mm to 48mm according to different construction scaffolding system and concrete formwork requirements.