U Bolt

MNK INDUSTRY is also a manufacturer and supplier of different U Bolts, J bolts, Eye Bolts, L bolts, Stud bolts, Transformer clamping ring, Transformer Arcing Horn, High Tension fittings, Threaded rods, Pipe Clamps, Pole clamps, J bolts, Dholak bolts, Saddle clamps, foundation bolts, submersible pipe clamps, submersible U clamps and more hardware related products.

What is a U Bolt ?

U bolt is a bolt that has been formed in the shape of the letter U. Since the letter you has curved ends it can be easily fitted around the pipes or Tubing. U bolts can be used to support and secure piping work and also work as restraints. The main reason that they use it over the piping is that it prevents the pipe from moving or striking each other which results in wearing down. This U bold is made up of many kinds of materials because it should be non-corrosive and should have long durability. In the market, the common U bolts material available is plain carbon steel, 316 stainless steel, and lastly 304 stainless steel materials. If the bolts have to be non-corrosive a layer of coating that is protective coating should be applied. The common type of coating is zinc plating, hot-dip galvanization, fluoropolymer coating, Thermoplastic coating.

The stainless-steel material will have a nickel plating and this process is carried out by using electricity. Similarly, hot-dip galvanization is also the process of adding zinc but it gives a thicker coating because the bold itself is dunkin in the molten zinc and can be easily used under water as well.

Fluoropolymer is a mixture of elements that are applied over stainless steel, commonly a mixture of elements are xylan, Teflon, or PTFE. The thermoplastic process involves adding buffers to the materials (Tavares et. Al., 2020).

There are many types in the U bolts. The SS square U bolts are made up of stainless steel. The SS 316 U bolts are most commonly used because they have a good corrosion resistance where it is compared to the 304 U bolts but the 316 U bolts are a little bit expensive as well.

U Bolt manufacturer in India
Pipe holding U Clamps
Golden Coating U Bolt manufacturer in India

MNK INDUSTRY is one of the leading manufacturers of U Bolts, Eye Hooks, Transformer Clamps and other Hardware products in India.

    Different Industries for which U bolts are used

    Standard U Bolt Dimensions for Pipes in Inches

    Sr No.Nominal Pipe SizeThread Size(QA)Between Centres (N in mm)Depth of U (M in mm)Thread Length (K in mm)
    11/2″M6284830
    23/4″M6345330
    31″M6416030
    41.1/4″M10546730
    51.1/2″M10608535
    62″M10759535
    72.1/2″M129012455
    83″M1210212650
    94″M12131144.550
    105″M1215618250
    116″M1218221050
    128″M1624025250
    1310″M1629231850
    1412″M16343363.650

    Standard U Bolt Dimensions for Steel Pipes in NB

    Sr No.Nominal Pipe Size (NB)ODThread Size(QA in mm)Between Centres (N in mm)Depth of U (M in mm)Thread Length (K in mm)
    11521.8M6384525
    22027.3M6444930
    32534.2M8525530
    43242.9M8626530
    54048.8M8667540
    65060.8M8808540
    76576.6M89410050
    88089.5M1211212055
    9100115M1213614555
    10125140.8M1216217055
    11150166.5M1619420565
    12175194M1622023065
    13200219.1M1624626065
    14225244.5M1627228565
    15250273.1M1630031565
    16300323.9M2035437265
    17350355.6M2038640080
    18400406.4M2043645080
    19450457M2549351080
    20500508M2554556580
    21550559M2559561580
    22600610M2564567080

    Standard U Bolt Dimensions for Cast Iron Pipes in NB

    Sr No.Nominal Pipe Size (NB)ODThread Size(QA in mm)Between Centres (N in mm)Depth of U (M in mm)Thread Length (K in mm)
    18098M1212013455
    2100118M1214015055
    3150170M1619620565
    4200222M1624826065
    5250274M1630031565
    6300326M2035637265
    7350378M2040842580
    8400429M2046047580
    9450480M2551554080
    10500532M2556759080
    11600635M2567169580

    Different material in which U Bolts are manufactured-

    1.  Mild Steel
    2.  Solid Steel (SS) 
    3.  Copper

    Different types of finishing in which U Bolts are manufactured -

    1.  Hot Dip GI Coating
    2.  Zinc Coating
    3.  Black Powder Coating
    4. Nickel Coating
    5.  Zinc and Yellow chromate coating
    6. Plain Finish without coating

    MNK INDUSTRY is a U Bolt manufacturer in India and is a supplier and distributor in different cities of India -