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

MT - Torquenut™ / Standard Mechanical Tensioners
• Operating Temp: -50ºF to 500ºF

• Description: MT tensioners are used on general mechanical applications. They can be used on high or medium strength bolts and studs and will fit in the same area as a heavy hex nut. The MT series features hex-head jackbolts.

• Application Examples: General machinery, mining equipment, anchorbolts, gear boxes, pinion stands, tables, crushers, engines, compressors, presses, etc.

• Description: CY series tensioners are used for higher bolt loads on general machinery applications. They fit in the same area as a heavy hex nut.

• Application Examples: Semi-cryogenic bolting, compressors, pumps, high pressure flanges, pinion stands, gear reducers, gear boxes, split gears, crushing equipment, presses, and military equipment.

• Description:

SJX - Jamnut Tensioners (Moly Lubricant)
• Operating Temp: -50ºF to 500ºF

• Description: SJX Jamnuts are used for applications where limited headroom and/or limited thread engagement are required. On request jamnuts are available with Superbolt's® patented captive set screws.

• Application Examples: Hydraulic cylinders, shaft mounts, pipe flanges, and inaccessible places.

SMX - Mill Motor Series (Moly Lubricant)
• Operating Temp: -50ºF to 500ºF

• Description: SMX Mill Motor Nuts are used to replace standard mill motor armature nuts supplied by electric motor manufacturers. SMX tensioners are available for most standard motor frame sizes.

• Application Examples: Mill motor nut on brake wheel.

NI - Bearing Locknuts (Moly Lubricant)
• Operating Temp: -50ºF to 500ºF

• Description: NI bearing lock nuts are directly interchangeable with standard AN and N series locknuts. Bearing locknuts are ideal for jacking bearings into place. They can also clamp entire shaft assemblies..

• Application Examples: Common bearings.

MTA - Torquenuts™ / Armored Mechanical Tensioners
• Operating Temp: -50ºF to 500ºF

• Description: Superbolt® Armored Torquenuts™ are used primarily for rough service environments. The jackbolts are recessed in the nut or bolt body protecting them from flying debris or rotating parts.

• Application Examples: Mining equipment, anchorbolts, gear boxes, pinion stands, tables, crushers, engines, compressors, presses, etc..