HNBC Top Collar Hydraulic Nut HNTC Hydraulic Nuts are used in direct replacement of the existing conventional nut. They allow accurate loading of the bolt, and the load is then permanently retained by means of a load locking collar. This product is currently out of stock and unavailable. SKU: TF-hnbc-top-collar-hydraulic-nut Category: Tensioners Tag: TensionPro Related products TensionersDuo Multi-Stage Tensioners TensionersHNTC-25 Range Max 2500 Bar Pressure TensionersHNTC-15 Range – Max 1500 Bar Pressure TensionersSUB Range Drilled Hex Nuts