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 Sonar MeasurementSonar Ultrasonic TOF Measurement TensionersHNST Shim Type Hydraulic Nuts TensionersHNBC Bottom Collar Hydraulic Nut TensionersDuo Multi-Stage Tensioners