CONCENTRIC Hydraulic Gear hobbing fixture with Valcanized Rubber collet With quick change assembly & Hydraulic Lock Nut, Axial force nut for hob tightening. We CONCENTRIC are leading manufacturers of hydraulic workers holding for gear industry, Hydraulic collets for Precision pars menuficturer industry. we also give customized solutions as per requirements. HYDRAULIC LOCK NUT 24LH × 1.5P HYDRAULIC LOCK NUT 27LH x 1.5P HYDRAULIC LOCK NUT 30LH x 1.5P HYDRAULIC LOCK NUT 36LH x 1.5P