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C.P. Tank, Girgaon, Mumbai – 400 004
Products

Fasteners

Fasteners

Industrial Fasteners

We supply a complete range of industrial fasteners designed for critical applications in oil & gas, petrochemical, and power generation industries.

SS 304SS 316SS 321 Alloy Steel B7/B16MonelInconel HastelloyDuplex
Hex Bolts & Heavy Hex Bolts
In Stock

Hex Bolts & Heavy Hex Bolts

Our heavy hex bolts provide higher tensile strength for demanding connections. Available in fully threaded and partially threaded variants.

  • Specs: ASTM A193 B7/B8/B16, A320
  • Size: M6 to M100
  • Length: 16mm to 500mm
  • Standards: ASME B18.2.1, DIN 931/933, IS 1364
Size (M) Thread Pitch Head Width (mm) Head Height (mm)
M61.010.04.0
M81.2513.05.3
M101.517.06.4
M121.7519.07.5
M162.024.010.0
M202.530.012.5
M243.036.015.0
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Hex Nuts & Heavy Hex Nuts
In Stock

Hex Nuts & Heavy Hex Nuts

High-strength nuts intended for use with our hex bolts and stud bolts. Designed to withstand high pressure and temperature variations.

  • Specs: ASTM A194 2H/Gr.8/Gr.8M
  • Size: M6 to M100
  • Standards: ASME B18.2.2, DIN 934
Available Grades
GradeUNS No.Standard
304/304LS30400ASTM A193 B8
316/316LS31600ASTM A193 B8M
Duplex 2205S32205ASTM A182
Alloy 20N08020ASTM A193
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Flat Washers & Spring Washers
In Stock

Flat Washers & Spring Washers

Distribute the load of a threaded fastener and prevent loosening due to vibration or thermal expansion.

  • Specs: ASTM F436, F844
  • Size: M6 to M100
Available Grades
GradeUNS No.Standard
304/304LS30400ASTM A193 B8
316/316LS31600ASTM A193 B8M
Duplex 2205S32205ASTM A182
Alloy 20N08020ASTM A193
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Stud Bolts
In Stock

Stud Bolts (Fully Threaded & Tap End)

Essential for flange connections. Available fully threaded or with tap ends depending on piping requirements.

  • Specs: ASTM A193 B7/B8/B8M/B16
  • Size: M10 to M100
  • Length: 30mm to 3000mm
Size (M) Thread Pitch Standard Lengths (mm)
M121.7550, 75, 100, 150
M162.075, 100, 125, 150, 200
M202.5100, 150, 200, 250
M243.0100, 150, 200, 250, 300
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Technical Specifications

Standard Dimension Chart

Refer to the 3D drawing and standard dimensions table below before placing your order.

3D Dimension Drawing

Note: Standard reference diagram for Bolt Fastener Dimensions.

Metric SizeThread Pitch (mm)Head Width A/F (mm)Head Thickness (mm)
M61.010.04.0
M81.2513.05.3
M101.517.06.4
M121.7519.07.5
M162.024.010.0
M202.530.012.5
M243.036.015.0
M303.546.018.7
M364.055.022.5
Material Data Sheet

Chemical Composition & Mechanical Properties

Standard chemical composition and mechanical property ranges for the bolting materials used across our fastener range.

Mill Test Certified Data Select a grade below to view its properties
ElementComposition (wt %)
Carbon (C)0.08 max
Manganese (Mn)2.00 max
Silicon (Si)1.00 max
Chromium (Cr)18.0 – 20.0
Nickel (Ni)8.0 – 11.0
Phosphorus (P)0.045 max
Sulphur (S)0.030 max
PropertyTypical Value
Tensile Strength (Class 2)690 MPa min
Yield Strength (Class 2)550 MPa min
Elongation at Break (Class 2)15% min
Hardness (Class 2)≤ 35 HRC
ElementComposition (wt %)
Carbon (C)0.08 max
Manganese (Mn)2.00 max
Silicon (Si)1.00 max
Chromium (Cr)16.0 – 18.0
Nickel (Ni)10.0 – 14.0
Molybdenum (Mo)2.0 – 3.0
Phosphorus (P)0.045 max
PropertyTypical Value
Tensile Strength (Class 2)690 MPa min
Yield Strength (Class 2)550 MPa min
Elongation at Break (Class 2)15% min
Hardness (Class 2)≤ 35 HRC
ElementComposition (wt %)
Carbon (C)0.030 max
Manganese (Mn)2.00 max
Silicon (Si)1.00 max
Phosphorus (P)0.030 max
Sulphur (S)0.020 max
Chromium (Cr)22.0 – 23.0
Nickel (Ni)4.5 – 6.5
Molybdenum (Mo)3.0 – 3.5
Nitrogen (N)0.14 – 0.20
PropertyTypical Value
Tensile Strength620 MPa min
Yield Strength (0.2% Proof)450 MPa min
Elongation at Break25% min
Hardness≤ 293 HB / 30 HRC
ElementComposition (wt %)
Nickel (Ni)32.0 – 38.0
Chromium (Cr)19.0 – 21.0
Molybdenum (Mo)2.0 – 3.0
Copper (Cu)3.0 – 4.0
Carbon (C)0.07 max
Manganese (Mn)2.00 max
Silicon (Si)1.00 max
Niobium (Nb) + Tantalum8×C – 1.00
PropertyTypical Value
Tensile Strength549 MPa min
Yield Strength (0.2% Proof)205 MPa min
Elongation at Break30% min
Hardness≤ 90 HRB
Values shown are typical specification ranges as per ASTM A193 / A182. Actual mill test certificate (MTC) values are supplied with every dispatch.