SHI-HO SCREW INDUSTRIAL CO., LTD. 

UP SCREW has a flanged head with cup shape which has same function with spring lock washer. By making the flange in the shape of a cup, CUP SCREW becomes possible to perform fastening at high torque and to obtain an excellent loose-proof effect.
1) With adoption of CUP SCREW, no assembly washers are required.
2) CUP SCREW provides high maximum tightening torque, with excellent loose-proof effect.
3) CUP SCREW helps further increase the loose-proof effect in combination with the use of TRI-LOBULAR screw.
4) With use of CUP SCREW, there is no more problem of damage to tightened object material.
Applications:
1) In the case where cost reduction is intended from fastening using washers, CUP SCREW is a good choice.
2) In some cases requiring high fastening force for protection against loosening, CUP SCREW is one of the best solutions.
3) CUP SCREW can be applied to Copying machine, OA equipment, automobile parts, etc.