U Bolt

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U-Bolts are specialized bent fasteners shaped like the letter "U" with threads on both ends, primarily used for supporting pipework, securing conduits, and clamping cylindrical components in industrial infrastructure. Essential for maintaining the stability of piping systems under vibration or thermal expansion, they act as both a restraint and a guide. Manufactured to standards such as DIN 3570 and ASME B18.31.5, our U-Bolts are available in Round, Square, and V-bend configurations. At Inconel Fasteners, we specialize in producing high-performance U-Bolts from corrosion-resistant alloys like Inconel 600, 625, and Incoloy 825, ensuring reliable pipe support in offshore rigs, chemical refineries, and power generation plants where standard steel would fail.

Detailed Specifications

Pipe Size Capacity
1/2" NB to 36" NB DN15 to DN1000 Thread: M6 to M64
Leg Length / Height
Standard DIN Dimensions Extended Legs (Long Tangent) Custom Heights Available
Type of Threads
Metric Coarse Metric Fine UNC UNF BSW
Standards & Configuration
DIN 3570 (Pipe Clamp) ASME B18.31.5 Round Bend Square Bend
Type of Manufacturing
Cold Bending Hot Bending (Large Sizes) Thread Rolling
Raw Material Origin
Indian Origin European Origin Japanese Origin US Origin Korean Origin
Finish Part Origin
Made in India Custom Origin per Request
Surface Coating
Plain / Oil Black Hot Dip Galvanized (HDG) Zinc Plated PVC / Rubber Coated (Cushioned) PTFE / Teflon
Marking
Manufacturer Logo Grade ID Heat Number (Traceability)
Heat Treatment Details
Solution Annealing Stress Relieving Normalizing
Delivery Terms
Ex-Works (EXW) FOB CIF CFR DDP
Packing Type
Carton Boxes Wooden Pallets Wooden Crates Export Worthy Packing
Payment Methods
L/C (Letter of Credit) T/T (Wire Transfer) Western Union
Certifications
ISO 9001:2015 PED 2014/68/EU MTC EN 10204 3.1
Additional Certifications
NABL Approved Lab Reports Third Party Inspection (TPI) RoHS Compliance
Mandatory & Additional Requirements
Positive Material Identification (PMI) NACE MR0175 / ISO 15156 Dimensional Check Intergranular Corrosion Test (IGC)

Available Inconel Grades & Standards

Dimensions Chart (DIN 3570 U-Bolt)

Pipe Size (NB) Pipe OD (d2)
(Max)		 Thread Size (d1) Inside Width (a)
(Min)		 Total Height (h1)
15 NB (1/2") 21.3 mm M10 30 mm 60 mm
20 NB (3/4") 26.9 mm M10 35 mm 70 mm
25 NB (1") 33.7 mm M10 40 mm 76 mm
32 NB (1-1/4") 42.4 mm M10 50 mm 86 mm
40 NB (1-1/2") 48.3 mm M10 54 mm 92 mm
50 NB (2") 60.3 mm M12 71 mm 109 mm
65 NB (2-1/2") 76.1 mm M12 87 mm 125 mm
80 NB (3") 88.9 mm M12 100 mm 138 mm
100 NB (4") 114.3 mm M16 125 mm 171 mm
150 NB (6") 168.3 mm M20 182 mm 230 mm
200 NB (8") 219.1 mm M20 232 mm 282 mm

Chemical Composition (Inconel Grades)

Grade Ni (Nickel) Cr (Chromium) Fe (Iron) Mo (Molybdenum) Nb (Niobium) Other Elements
Inconel 625 58.0% Min 20.0 - 23.0% 5.0% Max 8.0 - 10.0% 3.15 - 4.15% Ti 0.4%, Al 0.4%
Inconel 825 38.0 - 46.0% 19.5 - 23.5% 22.0% Min 2.5 - 3.5% - Cu 1.5 - 3.0%, Ti 0.6 - 1.2%
Inconel 600 72.0% Min 14.0 - 17.0% 6.0 - 10.0% - - Mn 1.0%, C 0.15%
Inconel 601 58.0 - 63.0% 21.0 - 25.0% Balance - - Al 1.0 - 1.7%
Inconel 718 50.0 - 55.0% 17.0 - 21.0% Balance 2.8 - 3.3% 4.75 - 5.5% Ti 0.65 - 1.15%
Inconel 800 30.0 - 35.0% 19.0 - 23.0% 39.5% Min - - Al 0.15 - 0.60%, Ti 0.15 - 0.60%
Inconel X-750 70.0% Min 14.0 - 17.0% 5.0 - 9.0% - 0.7 - 1.2% Ti 2.25 - 2.75%, Al 0.4 - 1.0%

Mechanical Properties (Inconel U-Bolts)

Grade Tensile Strength
(MPa / N/mm²) Min		 Yield Strength
(MPa / N/mm²) Min		 Elongation
(%) Min		 Hardness
(HRC / HB)
Inconel 625 827 414 30% 145 - 220 HB
Inconel 825 586 241 30% 135 - 165 HB
Inconel 600 550 240 30% 65 - 85 HRB
Inconel 601 550 205 30% 60 - 80 HRB
Inconel 718 1275 1035 12% 36 - 44 HRC
Inconel 800 520 205 30% 75 HRB (Max)
Inconel X-750 1100 700 15% 30 - 40 HRC

DIN Standards for Bolts

Comprehensive list of dimensional standards for industrial fasteners.

Series 100 - 900
  • DIN 186
  • DIN 188
  • DIN 261
  • DIN 444
  • DIN 479
  • DIN 580
  • DIN 601
  • DIN 603
  • DIN 604
  • DIN 605
  • DIN 610
  • DIN 787
  • DIN 797
  • DIN 931
  • DIN 933
  • DIN 933 SZ
Nuts & Precision
  • DIN 431
  • DIN 439 A/B
  • DIN 466
  • DIN 467
  • DIN 508
  • DIN 547
  • DIN 548
  • DIN 555
  • DIN 557
  • DIN 562
  • DIN 582
  • DIN 798
  • DIN 917
  • DIN 934
  • DIN 935
  • DIN 936
  • DIN 937
Studs & Washers
  • DIN 525
  • DIN 835
  • DIN 938
  • DIN 939
  • DIN 940
  • DIN 976
  • DIN 125 A/B
  • DIN 126
  • DIN 127 A/B
  • DIN 433
  • DIN 440 R/V
  • DIN 6796
  • DIN 7980
  • DIN 9021
Extended & Heavy Series
DIN 3570
DIN 7968
DIN 7969
DIN 7990
DIN 7992
DIN 70613
DIN 70614
DIN 80705
DIN 6331
DIN 6334
DIN 6915
DIN 6924
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