Application: Bushings for use on agricultural and construction machinery Properties: The bushings have a hardness depth of 0.8–1.0 mm, with hardness of HRC 58-62 Surface-hardened bolts with a tolerance of H7 are recommended in order for these bushings to work well The bush housings should have a tolerance of H7 (maximum H8) Technical information: Steel bushing with grease groove Ring lubrication groove on inside and outside, outward-pumping spiral lubrication groove on inside