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Nut-style tensioners
 
 
Superbolt multi-jackbolt tensioners (MJTs) replace existing hex nuts. Only hand tools are required for installation and removal of any size tensioner. Safe, accurate and economical! We have a wide range of standard series, as well as an unlimited capacity to create special designs to meet your unique needs.
 
Superbolt products are an innovative technology for tightening large bolts & studs. MJTs have been proven and established as a preferred solution for bolting in every major industry, all over the world.
 
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. MJTs ensures a profitable life cycle cost by improving the bolt design for OEM manufacturers, ensuring reliable operation and by facilitating maintenance procedures.
 
MT - Standard tensioner
 
Nut-style multi-jackbolt tensioners (MJTs) are an innovative bolting product that will eliminate expensive and dangerous tooling. Only hand/air tools are required to install or remove any size MJT.
 
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.
 
Selection Guide:
 
  •   MT - Standard nut-style 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)
  •   Surface treatment: optional
  •   Notes: Equivalent bolt-style tensioner is SB8
 
 
CY - High strength tensioner
 
Nut-style multi-jackbolt tensioners (MJTs) are an innovative bolting product that will eliminate expensive and dangerous tooling. Only hand/air tools are required to install or remove any size MJT.
 
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.
 
Selection Guide:
 
  •   CY - High strength nut-style 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)
  •   Surface treatment: optional
  •   Application samples: Bolting applications in demanding industries
  •   Notes: Equivalent bolt-style tensioner is SB12
 
 
H650 - Medium temperature tensioner
 
Nut-style multi-jackbolt tensioners (MJTs) are an innovative bolting product that will eliminate expensive and dangerous tooling. Only hand/air tools are required to install or remove any size MJT.
 
Description:
 
H650 tensioners are used for medium temperature, pressure vessel applications on A193-B7 bolts and studs. Material certification provided upon request. Preload and torque values are based on 45,000 psi bolt stress, the value most commonly used by pressure vessel designers. Depending on operating temperature, jackbolt torque and preload may be increased. Used with graphite Lubricant.
 
Selection Guide:
 
  •   H650 - Medium temperature 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)
  •   Surface treatment: optional
  •   Application examples: Large studs on boiler feed pumps, boiler circulating pumps, reactors, heat exchangers, etc.
 
 
H650T - Medium temperature, tall tensioner
 
Nut-style multi-jackbolt tensioners (MJTs) are an innovative bolting product that will eliminate expensive and dangerous tooling. Only hand/air tools are required to install or remove any size MJT.
 
Description:
 
H650T tensioners replace "acorn" and "castle" nuts and are intended for use where space is limited. They are lubricated with JL-G graphite lubricant.
 
Selection Guide:
 
  •   H650T - Medium temperature, tall
  •   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)
  •   Surface treatment: optional
  •   Application examples: split lines on turbines, engines, pumps, compressors, etc.
  •   Note: Also for applications with limited space in diameter
 
 
SJ tensioner - compact
 
Nut style Multi-jackbolt tensioners (MJTs) are an innovative bolting product that will eliminate expensive and dangerous tooling. Only hand/air tools are required to install or remove any size MJT.
 
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® proprietary captive set screws.
 
Selection Guide:
 
  •   SJ - Compact
  •   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)
  •   Surface treatment: optional
  •   Application examples: limited height such as hydraulic cylinders, shaft mounts, piston connections, foundations, etc.
 
Downloads:
  •   SJX Jamnut Tensioners Specification
  •   JL-M Lubricant Safety Data Sheet for SMX Supernuts
 
 
Dimension Charts - See brochure
 
Easy Order Shortcuts
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1 SUP-SMX-175-8/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-175-8/W 1.75 Inch Thread / Body Diameter 8 Threads Per Inch 3/8 Inch Diameter Set Screws 3/16 Inch Allen Bit Size 3.625 Inch Body Diameter Total Thickness with Washer 1.0625 Inch Includes a Tube of JL-M Moly Lube and the Hardened Washer [Amazon] (3LBS) H 4" L 5" W 4 Box 0 $121.12
2 SUP-SMX-802/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-802/W 1.00 Inch Nominal Thread / Stud Diameter 8 Threads Per Foot 3/8 Inch Diameter Set Screws 3/16 Inch Allen Bit 2.34 Inch Body Diameter Total Thickness with Washer 0.94 Inch Includes a Tube of JL-Moly Lube and the Hardened Washer For 602 & 802 Mill Motors [Amazon] Dated 1/18 (4LBS) H 6" L 7" W 6" Box 2 $57.38
3 SUP-SMX-803/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-803/W 1.25 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 3/8 Inch Diameter Set Screws 3/16 Inch Allen Bit 2.72 Inch Body Diameter Total Thickness with Washer 0.94 Inch Includes a tube of JL-M Moly Lube and the Hardened Washer For 603, 604 & 803, 804 Mill Motors [Amazon] Dated 1/18 (3LBS) H 5. L 5. W 5" Box 7 $71.19
4 SUP-SMX-804/W Superbolt Mill Motor Nut Assembly with a Hardened Wash Part SMX-804/W 1.25 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 3/8" Diameter Set Screws 3/16 Inch Allen Bit 2.72 Inch Body Diameter Total Thickness with Washer 0.94 Inch Includes a Tube of JL-M Moly Lube and the Hardened Washer For 603, 604 & 803, 804 Mill Motors Dated 1/18 - 2 $71.19
5 SUP-SMX-806/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-806/W 1.50 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch Set Screws 1/4 Inch Allen Bit 3.59 Inch Body Diameter Total Thickness with Washer 1.00 Inch Includes a Tube of JL-M Moly Lube and the Hardened Washer For 606, 806 & MD102 Mill Motors [Amazon] Dated 1/18 (4LBS) H 4" L 5" W 4" Box 6 $110.50
6 SUP-SMX-808/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-808/W 2.00 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch Qty. 8, 1/2" Diameter Set Screws / Jacking Bolts 1/4 Hex Bit Size 3.72 Inch Body Diameter Total Thickness with Washer 1.00 Inch Includes a Tube of JL-M Moly Jack Bolt Lube and the Hardened Washer For 608 & 808 Mill Motors [Amazon] Dated 1/18 (3LBS) H 6" L 6" W 6" Box 7 $134.72
7 SUP-SMX-810/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX810/W For 610 & 810 Mill Motors 2.25 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 5/8 Inch Diameter Set Screws 5/16 Inch Allen Bit 4.47 Inch Body Diameter Total Thickness with Washer 1.13 Inches Includes a Tube of JL-M Moly Lube and the Hardened Washer Stock to 3 Weeks (5LBS) Dated 1/18 - 4 $185.94
8 SUP-SMX-812/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-812/W 2.50 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 5/8 Inch Diameter Set Screws 5/16 Inch Allen Bit Torque to 58 LB FT Each 4.72 Inch Body Diameter Total Thickness with Washer 1.13 Inches Includes a Tube of JL-M Moly Lube and the Hardened Washer G3B37 For 612 & 812 Mill Motors [Amazon] Dated 1/18 (4LBS) H 6" L 6" W 6" Box 5 $227.38
9 SUP-SMX-814/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-814/W 3.00 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch Qty 8, 5/8 Inch Diameter Set Screws 5/16 Inch Allen Bit Body Diameter 5.47 Inches Total Thickness with Washer 1.25 Inches Includes a Tube of JL-M Moly Lube and the Hardened Washer Set Screw Torque 58 LB FT with JL-M Standard Preload 132,000 LBS For 614 & 814 Mill Motors [Amazon] Dated 1/18 (9LBS) H 4" L 5" W 4" Box 6 $300.69
10 SUP-SMX-816/W Superbolt Mill Motor Nut Assembly With a Hardened Washer Part SMX-816/W 3.25 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 5/8 Inch Diameter Set Screws 5/16 Inch Allen Bit 5.97 Inch Body Diameter 1.13 Inch Total Thickness with Washer Includes a Tube of JL-M Moly Lube and the Hardened Washer For 416, 616 & 816 Mill Motors [Amazon] Dated 1/18 (9LBS) H 6" L 6" W 6" Box 1 $362.31
11 SUP-SMX-818/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-818/W 3.50 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 5/8" Diameter Set Screws 5/16" Allen Bit Body Diameter 6.47 Inches Total Thickness with Washer 1.13 Inch Includes a Tube of JL-M Moly Lube and the Hardened Washer For 618 & 818 Mill Motors [Amazon] Dated 1/18 (4LBS) H 4" L 7" W 7" Box 2 $416.50
12 SUP-SMX-820/W Superbolt Mill Motor Nut Assembly with a Hardened Washer Part SMX-820/W 4.00 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 5/8 Inch Diameter Set Screws 5/16 Inch Allen Bit Body Diameter 7.22 Inches Total Thickness with Washer 1.38 Inches Includes a Tube of JL-M Moly Lube and the Hardened Washer For 620, 622 & 820, 822 Mill Motors [Amazon] Dated 1/18 (14LBS) H 3" L 8" W 8" Box 4 $440.00
13 SUP-SMX-822/W Superbolt Mill Motor Nut Assembly with a Hardened Washer 4.00 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch 5/8 Inch Diameter Set Screws 5/16 Inch Allen Bit Body Diameter 7.22 Inches Total Thickness with Washer 1.38 Inches Includes a Tube of JL-M Moly Lube and the Hardened Washer For 620, 622 & 820, 822 Mill Motors - 0 $472.81
14 SUP-SMX-824/W Superbolt Mill Motor Nut Assembly with a Hardened Washer 4.00 Inch Thread Dia 8 Threads Per Inch 5/8 Inch Diameter Set Screws 5/16 Inch Allen Bit Body Diameter 7.72 Inches Total Thickness with Washer 1.38 Inch Includes a Tube of JL-M Moly Lube and the Hardened Washer For 624 & 824 Mill Motors 3/17 - 0 $496.19
15 SUP-SMX-M27/W Superbolt Mill Motor Nut Assembly with Hardened Washer, Motor Frame - 1LT3 166, Thread Size - M27-1.5 3/7 - 0 $52.06
16 SUP-SMX-M33/W Superbolt Mill Motor Nut Assembly with Hardened Washer, Motor Frame - 1LT2 136/156, Thread Size - M33-1.5 - 0 $104.83
17 SUP-MT-100-14/W Superbolt Torquenut Mechanical Tensioner Part MT-100-14/W Torquenut / Standard Mechanical Tensioners with Hardened Washer 100 = 1.00 Bolt / Stud Diameter 14 - 14 TPI / Threads Per Inch With a Hardened Washer & JL-G Jack Bolt Lubricant 1.90 Inch O.D. Application information is now required with all Superbolt inquiries & orders See BPI web site for details [Amazon] Dated 10/17 Ships, Stock to 3 Weeks (1LB) H 4" L 5" W 4" Box 0 $57.51
18 SUP-MT-100-8/W Superbolt Torquenut Mechanical Tensioner Part MT-100-8/W Standard Torque Nut 1.00 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch With a Hardened Washer & JL-G Jack Bolt Lubricant 1.90 Inch O.D. Application information is now required with all Superbolt inquiries & orders See BPI web site for details [Amazon] Dated 10/17 Ships, Stock to 3 Weeks (3LBS) H 4" L 5" W 4" Box 4 $57.50
19 SUP-MT-150-12/W Superbolt Torquenut MT Part SUP-MT-150-12/W Torquenut / Standard Mechanical Tensioners 1.5 Inch Nominal Thread Diameter 12 Threads Per Inch Features Hex-Head Jack Bolts With a Hardened Washer & Tube of JL-G Graphite Lubricant [Amazon] (3LBS) H 5" L 4" W 4" Box 0 $76.50
20 SUP-MT-175/W Superbolt Torquenut MT Torquenut / Standard Mechanical Tensioners 175 = 1.75 Bolt / Stud Diameter /W Includes a Hardened Washer 3.08 Inch OD 2 Weeks (2.3LBS) Dated 10/17 - 0 $151.30
21 SUP-MT-300-8/W Superbolt Mechanical Tensioner Part SUP-MT-300-8/W Standard Torque Nut 3.00 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch Qty 8, 9/16 Inch Hex-Head Jacking Bolts With a Hardened Washer by 0.31 Thick & JL-G Jack Bolt Lubricant 5.2 Inch OD Dated 7/17 [Amazon] (9LBS) H 6" L 6" W 4" Box 0 $326.19
22 SUP-MT-350-4/W Superbolt Mechanical Tensioner Standard Torque Nut 3.50 Inch Nominal Thread / Stud Diameter 4 Threads Per Inch Qty X, X/XX Inch Hex-Head Jacking Bolts With a Hardened Washer by 0.XX Thick & JL-G Jack Bolt Lubricant X.X Inch OD (13LBS) H 6" L 6" W 4" Box [Amazon] 4 $409.06
23 SUP-MT-375-8 Superbolt Mechanical Tensioner Part SUP-MT-375-8/W Standard Torque Nut 3.75 Inch Nominal Thread / Stud Diameter 8 Threads Per Inch Qty X, X/XX Inch Hex-Head Jacking Bolts With a Hardened Washer by 0.XX Thick & JL-G Jack Bolt Lubricant X.XInch OD Dated 9/14 [Amazon] (XLBS) H 6" L 6" W 4" Box - 0 $479.19
24 SUP-MT-48 MT Standard Torque Nut, Coarse Pitch 5 MM - 0 $128.75
25 SUP-MT-M20-2.5/W Superbolt Torquenut MT Torquenut / Standard Mechanical Tensioners with Hardened Washer 20 = 20mm Diameter 2.5 = 2.5 TPI / Threads Per Inch / W = Includes a Hardened Washer & JL-G Lubricant 37mm OD - 0 $41.44
26 SUP-SB8-100-14-0400 Superbolt 1.00-14 UNF x 4.00 Inches Long 8/14 - 0 $162.56
27 SUP-SJ-200-4.5/W Superbolt SJ-200-4.5 3 Weeks 4/14 - 0 $157.50
28 SUP-SJX-200-12/W Superbolt Jam Nut Part SJX-200/W 2.00 Inch Thread Diameter 4.2 Inch O.D. SJX are used for applications where limited headroom and / or limited thread engagement is required On request, Jamnuts are available with Superbolt's patented captive set screws 10/14 - 0 $206.13
29 SUP-H650-275-8/W Superbolt STD.H650, 2.750-8 Part H650-275-8/W 2.75-8 TPI Medium Temp Tensioner with Hardened Washer Application information is now required with all Superbolt inquiries & orders Dated 5/14 - 0 $345.31
30 SUP-H650T-275-8/W Superbolt STD.H650T, 2.750-8 Part SUP-H650T-275-8/W 2.75-8 TPI Medium Temp Tensioner with Hardened Washer Application information is now required with all Superbolt inquiries & orders Dated 10/17 - 0 $418.63
31 SUP-JL-M TUBE 15ML Superbolt Lube JL-M Part JL-M Tube 15ML Moly-Disulphide Based Jackbolt Lubricant One 15ML Squeeze Tube Apply between Jackbolt Tips & Washer MSDS, CofC & Shelf Life Statements are on the BPI Web Site [Amazon] Dated 1/18 Normally a stock item @ BPI (1LB) H 4" L 5" W 4" Box 89 $4.50
32 SUP-JL-G TUBE 15ML Superbolt Lube Part JL-G Tube 15ML Graphite Based Jackbolt Lubricant One 15ML Squeeze Tube Apply between Jackbolt Tips & Washer MSDS, CofC & Shelf Life Statements are on the BPI Web Site Normally a stock item @ BPI [Amazon] Dated 1/18 (1LB) H 4" L 5" W 4" Box 158 $2.50
Application Information Requirements
 
In line with the manufacturer's requirements, Brake Products, Inc. is now obligated to obtain the following application information, before providing any fasteners inquiries/orders:
  1. What is the application?
  2. What is the required preload or what are they currently torqueing the nuts to?
  3. What is the operating temperature?
  4. Are there any space limitations?
  5. Attach any drawing or picture of the application.
This is only the basic application information and more questions may follow depending on the application itself.
 
 
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What is a multi-jackbolt tensioner?

 
A "Superbolt" or "multi-jackbolt tensioner (MJT)" is a direct replacement for hex nuts, covered nuts, bolts, etc. They spin onto your existing bolt or stud and provide a better way to bolt up your joint. They consist of three components, shown above.
 
Click here to learn more
Superbolt Lube
 

Superbolt Lube
 
JL-M
Moly-Disulphide Based Jackbolt Lubricant: JL-M MSDS
 
JL-G
Graphite Based Jackbolt Lubricant: JL-G MSDS
 
Apply between Jackbolt Tips & Washer.
 
JL-G and JL-M Lubricant Certificate of Conformance
 
JL-G and JL-M Lubricant Shelf Life Letter
 
Nut-style tensioners

Nut-style tensioners
 
Superbolt multi-jackbolt tensioners (MJTs) replace existing hex nuts. Only hand tools are required for installation and removal of any size tensioner. Safe, accurate and economical! We have a wide range of standard series, as well as an unlimited capacity to create special designs to meet your unique needs.
Bolt-style tensioners

Bolt-style tensioners
 
Bolt style Superbolt multi-jackbolt tensioners (MJTs) replace existing studs or bolts. Ideal for applications with tapped holes, or where threading a stud into a nut would be impractical. The outside diameter is smaller than a nut type tensioner on a stud, allowing MJTs to fit into tighter areas.
Flexnuts

Flexnuts
 
Flexnuts are used in combination with Superbolt tensioners and are designed to flex out at the bottom and flex in toward the top of the nut. This distributes the bolt load along many threads, adds elasticity, and prevents stress concentrations in the first few threads.
SMX Mill Motor Nuts

SMX Mill Motor Nuts
 
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. Preload matches the hub stress capacity of brake wheels and pulleys.
 
This web site is owned and operated by Brake Products, Inc.
Brake Products, Inc.   16751 Hilltop Park Place
  Chagrin Falls, Ohio 44023
  Phone: (440) 543-7962
  Fax:     (440) 543-7963
  Web:   www.brakeproducts.com
  Email: sales@brakeproducts.com
  Federal ID #: 34-1473351
  CAGE Code: 1QTP8
  DUNS# 14-748-2392
  Download: Form W-9
Supplier of Industrial Brake Parts Since 1985