Superbolt® Multi-Jackbolt Tensioners

Ensure precise preload and enhanced safety by upgrading existing bolts with Superbolt multi-jackbolt tensioners.

BOLTING MADE SIMPLE

Superbolt was the world’s first to revolutionize nuts and bolts with the multi-jackbolt tensioner (MJT) in 1984. Since then, Superbolt has proven its technology in tens of thousands of successful installations.

Superbolt MJTs are easy to work with and provide an overwhelming mechanical advantage with their unique design, which divides the load among multiple small jackbolts. Once installed properly, MJT connections are reliable, and can stay tight indefinitely. Even MJTs of enormous sizes are safe and can be installed or removed by a single worker with ordinary hand tools.

Superbolt multi-jackbolt tensioners take high preload requirements and break them down into manageable torques using the jackbolts threaded through the nut body. They remain easy to install, even on larger sizes, compared to standard hex bolts.

Superbolt tensioners offer you simple and cost-effective tightening of large size bolts. Your joints can be tightened with high accuracy without requiring specialized skills or heavy tooling. A wide range of tensioners is available in the standard series, as well as an unlimited capacity to create special designs to meet your unique needs.

ADDITIONAL INFORMATION

Advantages

Specifications

Superbolt tensioners offer you simple and cost-effective tightening of large size bolts. Your joints can be tightened with high accuracy without requiring specialized skills or heavy tooling.

A wide range of tensioners is available in the standard series, as well as an unlimited capacity to create special designs to meet your unique needs.

The standard series includes nut-style and bolt-style tensioners.

Tensioner type	Specifications
GT Standard nut tensioner	Dimension range: M16 - M160 (3/4″ – 6″) Approx. bolt stress depending on size: 400 to 1000 N/mm2 (60 to 145 ksi) Temperature range: -40 to 250ºC (-50 to 500ºF)
GTS Super high-strength nut tensioner	Dimension range: M16 - M100 (3/4″ – 4″) Approx. bolt stress depending on size: 400 to 1200 N/mm2 (60 to 175 ksi) Temperature range: -40 to 250ºC (-50 to 500ºF)
MT Standard nut tensioner	Dimension range: M16 - M160 (3/4″ – 6″) Approx. bolt stress depending on size: 450 to 700 N/mm2 (60 to 100 ksi) Temperature range: -10 to 250ºC (0 to 500ºF)
CY High-strength nut tensioner	Dimension range: M16 - M160 (3/4″ - 6″) Approx. bolt stress depending on size: 500 to 900 N/mm2 (70 to 130 ksi) Temperature range: -40 to 250ºC (-50 to 500ºF)
H650 Medium-temperature nut tensioner	Dimension range: M20 - M125 (3/4″ - 5″) Approx. bolt stress depending on size: 310 N/mm2 (45 ksi) Temperature range: up to 350ºC (up to 650ºF)
H650T Medium nut temperature, tall tensioner	Dimension range: M24 - M100 (1” - 4”) Approx. bolt stress depending on size: 310 N/mm2 (45 ksi) Temperature range: up to 350ºC (up to 650ºF)
SJ Compact nut tensioner	Dimension range: M20 - M160 (3/4″ - 6″) Approx. bolt stress depending on size: 250 to 400 N/mm2 (35 to 60 ksi) Temperature range: -10 to 250ºC (0 to 500ºF)
SB8 Standard bolt tensioner	Dimension range: M16 - M160 (3/4″ - 6″) Approx. bolt stress depending on size: 400 to 650 N/mm2 (60 to 95 ksi) Temperature range: -10 to 250ºC (0 to 500ºF)
SB12 High-strength bolt tensioner	Dimension range: M20 - M90 (3/4″ - 3-1/2″) Approx. bolt stress depending on size: 500 to 850 N/mm2 (70 to 125 ksi) Temperature range: -10 to 250ºC (0 to 500ºF) – lower temperatures on demand

Downloads

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Superbolt - Technology Full Range Brochure.pdf
Superbolt - Mechanical Bolt Tensioning.pdf
Superbolt - Multi-Jackbolt Tensioner Manual.pdf
Tensioning application checklist.pdf
Loctite LB 8012 Low-Friction Lubricant Moly Paste Henkel.pdf
Molykote P-37 Antiseize Paste.pdf
Molykote P-74 Paste Dupont.pdf

Technical drawings

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Superbolt Tensioners Dimension Sheet - CY Metric.pdf
Superbolt Tensioners Dimension Sheet - CY UNC.pdf
Superbolt Tensioners Dimension Sheet - GT.pdf
Superbolt Tensioners Dimension Sheet - GTS.pdf
Superbolt Tensioners Dimension Sheet - H650 Metric.pdf
Superbolt Tensioners Dimension Sheet - H650 UNC.pdf
Superbolt Tensioners Dimension Sheet - H650T Metric.pdf
Superbolt Tensioners Dimension Sheet - H650T UNC.pdf
Superbolt Tensioners Dimension Sheet - MT Metric.pdf
Superbolt Tensioners Dimension Sheet - MT UNC.pdf
Superbolt Tensioners Dimension Sheet - SB12 Metric.pdf
Superbolt Tensioners Dimension Sheet - SB12 UNC.pdf
Superbolt Tensioners Dimension Sheet - SB8 Metric.pdf
Superbolt Tensioners Dimension Sheet - SB8 UNC.pdf
Superbolt Tensioners Dimension Sheet - SJ Metric.pdf
Superbolt Tensioners Dimension Sheet - SJ UNC.pdf

Lubricant

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Loctite LB 8012 Low-Friction Lubricant Moly Paste Henkel.pdf
Molykote P-37 Antiseize Paste.pdf
Molykote P-74 Paste Dupont.pdf

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Learnings

DIGITAL TOOLS

SUSTAINABILITY

Learnings

DIGITAL TOOLS

SUSTAINABILITY

Learnings

DIGITAL TOOLS

SUSTAINABILITY

Learnings

DIGITAL TOOLS

SUSTAINABILITY

Learnings

DIGITAL TOOLS

SUSTAINABILITY

Superbolt® Multi-Jackbolt Tensioners

BOLTING MADE SIMPLE

ADDITIONAL INFORMATION

TESTING & CERTIFICATION

Downloads

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Technical drawings

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Lubricant

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