Multi-Jackbolt Tensioners - Nut Style
Below are the available series. These are simply guidelines to choose the appropriate product for your application. When you contact us for a quote or to order, we will verify that the correct product is being purchased for your situation. Thank you for your interest!

Standard Series:
• MT
• CY
• MTSX
• SJX - Jamnuts
• SMX - Mill Motor Nuts
• NI - Bearing Locknuts
• MTA - Armored
• CN - Crosshead Jamnut
• SP - Piston End Nut
• SX8 - Flexnuts
• SX12 - High Strength Flexnuts

Medium Temperature Products (-50ºF to 650ºF):
• H650
• H650X
• H650T
• H650TX

High-Temperature Products (650ºF to 1200ºF):
• H1215
• H1216
• H1218

CN - Compressor Crosshead Jamnut
• Operating Temp: -50ºF to 500ºF

• Description: CN Crosshead Jamnuts are safe and easy to install/remove on compressor crossheads. They were designed in conjunction with a major compressor manufacturer. Crosshead Jamnuts have Superbolt® patented "captive" machinery type jackbolts as an added safety feature. The bolt circle is larger than on standard torquenuts™ to allow wrench clearance from the piston rod.

•Application Examples: Compressor crosshead.

SP - Compressor Piston End Nuts

• Description: Superbolt® offers the SP series in custom designed Piston End Nuts. These nuts are “Torquenut™” type Multi-Jackbolt tensioners designed to properly attach compressor pistons to the piston rod. There is no need to clamp the piston rod when installing or removing SP Nuts. Because almost every compressor piston is custom designed to accommodate different gases at different temperatures, the Piston End Nuts that attach the pistons to the rods also vary. The space available for Piston End Nuts varies. Nut material may also vary due to corrosion resistance requirements. Superbolt® has an extensive data base of previously designed and installed Piston End Nuts. New applications can usually be designed by modifying an existing design. Most Piston End Nuts have Superbolt® patented “captive” machinery type jackbolts as an added safety feature.

• Application Examples: Piston end nut, hydraulic pistons