Superbolt® RE33490 Multi‑jackbolt Tensioner Nut

Multi‑jackbolt tensioner nut used to accurately preload large diameter studs or bolts using standard hand tools, designed to replace conventional heavy hex nuts in high‑load bolted joints and provide precise, uniform clamping force. Technical specifications: Product type: Multi‑jackbolt tensioner nut Brand: Superbolt® Manufacturer: Nord‑Lock Group Model / part number: RE33490 Series: Superbolt® RE series Function: Controlled bolt preload and joint tensioning Operating principle: Multiple jackbolts apply axial load to the main stud Installation method: Tightening of individual jackbolts with hand tools Main body material: Alloy steel Jackbolt material: High‑strength alloy steel Surface finish: Black oxide / protective coating Thread type: Female internal thread (matches mating stud) Thread form: Unified or metric, application specific Load capability: Suitable for high‑clamp‑load bolted joints Preload accuracy: High, controlled and repeatable Torque requirement: Significantly reduced compared to conventional nuts Lubrication requirement: Jackbolts lubricated (moly lubricant recommended) Reusability: Fully reusable when maintained per manufacturer guidelines Vibration resistance: High, suitable for dynamic loads Typical applications: Flanges, pressure vessels, turbines, compressors, heat exchangers, heavy machinery Industry usage: Oil & gas, power generation, mining, steel, marine, heavy industry Installation environment: Field or shop installation without hydraulic tools Markings: Permanent laser‑etched identification and torque guidance OEM status: Original Superbolt® product Manufacturer full name: Superbolt, Inc. (Nord‑Lock Group) Country of manufacture: USA Please review pictures carefully and let us know if you have any questions!