This product is a variant of GB/T1788.5-1999 standard, providing easier installation than full-hexagonal rivet nuts aIthough a hexagonal installation hole is still required to be punched to provide maximum torque against rotation. The transition section of the body consists of hexagonal and circular sections, which can be utilized as per customer’s own preference, aIthough it is easierto use hexagonal section because of its more uniform sheet. This product is available from size M4 to M10.