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!