Truefit Engineering Co. Ltd. Offers Adapter Sleeve for Metric Size Shaft. Truefit Engineering Co. Ltd. Is an ISO 9001:2000 certified company. Adapter Sleeve for Metric Size Shaft is supplied complete with lock nut and lock washer [or locking clip.] The dimensions of Adapter Sleeve for Metric Size Shaft conform to international standard ISO 113/I - 1979. This sleeve is available in the form of coated with phospating, modified inner diameter, stainless steel [SS304 & SS316] material, etc. Trapezoidal threads are provided on bigger sleeve having shaft diameter 200 mm and above. This sleeve is of H Series.