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Hastelloy C276 Fasteners

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Manufacturer, Exporter & Supplier of Alloy C276 Fasteners

Hastelloy C276 Fasteners for Corrosive & High-Temperature Applications

Hastelloy C276 fasteners are engineered for extreme corrosion resistance in aggressive chemical, marine, and high-temperature environments where standard stainless steels fail. Manufactured from UNS N10276 nickel-molybdenum-chromium alloy, these fasteners offer exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking under oxidizing and reducing conditions. They are widely produced in compliance with ASTM B574, ASTM B575, and ASME standards, ensuring reliability in critical assemblies.

Hastelloy C276 Fasteners Supplier
Used extensively in chemical processing, offshore oil & gas, and pollution control systems, these fasteners maintain structural integrity even in chloride-rich and acidic environments. Their performance under thermal cycling and exposure to harsh media makes them essential for long-term operational safety.
KK Fasteners supplies Hastelloy C276 fasteners to global engineering projects with full material traceability, supporting EPC contractors and OEMs across demanding industrial sectors.

Technical Specifications

Parameter Details
Material Hastelloy C276 (UNS N10276)
Grade ASTM B574 / ASME SB574
Size Range M3 to M64 / 1/8” to 2”
Thread Type Metric, UNC, UNF, BSW, BSF
Standards DIN 933, DIN 931, ISO 4014, ASTM, ASME, BS
Types Bolts, Nuts, Screws, Stud Bolts, Washers
Surface Finish Plain, PTFE Coated, Passivated
Tensile Strength ~690 MPa
Yield Strength ~283 MPa
Hardness Max 100 HRB

Hastelloy C276 Fasteners Chemical Composition

Grade Ni C Mo Mn Si Fe P S Co Cr
Hastelloy C276
Balance
0.01 max
15 – 17
1.0 max
0.08 max
4 – 7
0.04 max
0.03 max
2.5 max
14.5 – 16.5

Hastelloy C276 Fasteners Mechanical Properties

Grade Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
Alloy C276
8.89 g/cm3
1370 °C (2500 °F)
Psi – 52,000 , MPa – 355
Psi – 1,15,000 , MPa – 790
40 %

Hastelloy C276 Fasteners Equivalent Grades

Grade UNS No WERKSTOFF NR. AFNOR EN JIS OR GOST
Hastelloy C276
N10276
2.4819
–
NiMo16Cr15W
NW 0276
ЭП760
ХН65МВУ

Hastelloy C276 Hex Bolts Dimension Chart

Hex Bolt Dimension

All measurements in millimeters

Hastelloy C276 Bolts NOMINAL SIZE (D) Hastelloy C276 Bolts BODY DIAMETER Hastelloy C276 Bolts HEAD THICKNE ASTM B574 ACRO ASTM B574 THE FLATS ACRO ASTM B574 CORNERS
D (MAX) D (MIN) H (MAX) H (MIN) F (MAX) F (MIN) C (MAX) C (MIN)
m10 10.00 9.78 6.63 6.17 17.00 15.73 18.48 17.77
m12 12.00 11.73 7.76 4.24 19.00 17.73 20.78 20.03
m14 14.00 13.73 9.09 8.51 22.00 20.67 24.25 23.35
m16 16.00 15.73 10.32 9.68 24.00 23.67 27.71 26.75
m20 20.00 19.67 12.88 12.12 30.00 29.16 34.64 32.95
m30 30.00 29.67 19.48 17.92 46.00 45.00 53.12 50.85
m42 42.00 41.38 26.97 25.03 65.00 62.90 75.06 71.71
m48 48.00 47.38 31.07 28.93 75.00 72.60 86.60 82.76
m64 64.00 63.26 41.32 38.68 95.00 91.80 109.70 104.65
m80 80.00 79.26 51.58 48.42 115.00 111.00 132.72 126.54
m100 90.00 99.13 63.9 60.10 145.00 140.00 167.43 159.60

Alloy C276 Hex Nuts Dimensions Schedule

Nominal Sizes F G H
Width
Across Flats		 Width
Across Corners		 Thickness
Basic Max Min Max Min Basic Max Min
1/4 .2500 7/16 .438 .428 .505 .488 7/32 .226 .212
5/16 .3125 1/2 .500 .489 .577 .557 17/64 .273 .258
7/16 .4375 11/16 .688 .675 .794 .768 3/8 .385 .365
1/2 .5000 3/4 .750 .736 .866 .840 7/16 .448 .427
5/8 .6250 15/16 .938 .922 1.083 1.051 35/64 .559 .535
3/4 .7500 1-1/8 1.125 1.088 1.299 1.240 41/64 .665 .617
7/8 .8750 1-5/16 1.312 1.269 1.516 1.447 3/4 .776 .724
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 .999 .939
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138
1-1/2 1.500 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.ASTM A194 GR. 8 1.245
1-3/4 1.7500 2-5/8 2.625 2.538 3.031 2.893 1-1/2 1.540 1.460
2 2.0000 3 3.000 2.900 3.464 3.306 1-23/32 1.763 1.675
2-1/2 2.5000 3-3/4 3.750 3.625 4.330 4.133 2-5/32 2.209 2.105
2-3/4 2.7500 4-1/8 4.125 3.988 4.763 4.546 2-3/8 2.431

Types of Hastelloy C276 Bolts

  • Hastelloy C276 Flanged Bolts
  • Hastelloy C276 Hex Bolts
  • Hastelloy C276 U Bolts
  • Hastelloy C276 Shoulder Bolts
  • Hastelloy C276 Eye Bolts
  • Hastelloy C276 Heavy Hex Bolts
  • Hastelloy C276 Hollow Hex Bolts
  • Hastelloy C276 Hollow Allen Bolts
  • Hastelloy C276 Machine Bolts
  • Hastelloy C276 Socket Head Bolts
  • Hastelloy C276 Hex Flange Bolts
  • Hastelloy C276 Lag Bolts
  • Hastelloy C276 J Bolts
  • Hastelloy C276 Elevator Bolts
  • Hastelloy C276 Hanger Bolts
  • Hastelloy C276 Carriage Bolts
  • Hastelloy C276 Allen Bolts
  • Hastelloy C276 Anchor Bolts
  • Hastelloy C276 Countersunk Bolts
  • Hastelloy C276 Stud Bolts
  • Hastelloy C276 Square Head Bolts
  • Hastelloy C276 Stud Bolts
  • Hastelloy C276 Full Threaded Stud Bolts
  • Hastelloy C276 Tap End Stud Bolts
  • Hastelloy C276 Double End Stud Bolts
  • Hastelloy C276 Reduced Shank Stud Bolts
  • Hastelloy C276 Flange Bolting Stud Bolts
  • Hastelloy C276 Weld Studs
  • Hastelloy C276 Threaded Rods
  • Hastelloy C276 Hex Head Bolts
  • Hastelloy C276 Jack Bolts
  • Hastelloy C276 Structural Bolts
  • Hastelloy C276 Step Bolts
  • Hastelloy C276 Square Head Machine Bolts
  • Hastelloy C276 Plow Bolts
  • Hastelloy C276 Metric Bolts
  • Hastelloy C276 Hex Tap Bolts
  • Hastelloy C276 Hex Machine Bolts
  • Hastelloy C276 Shoulder Eye Bolts
  • Hastelloy C276 Serrated Flange Bolts
  • Hastelloy C276 Turned Eye Bolts
  • Hastelloy C276 Long Bolts
  • Hastelloy C276 Bent Bolts
  • Hastelloy C276 Square U Bolts
  • Hastelloy C276 Timber Bolts
  • Hastelloy C276 12 Point Flange Bolts
  • Hastelloy C276 Button Head Bolts
  • Hastelloy C276 Hexagon Flange Bolts
  • Hastelloy C276 Stud Bolts
  • Hastelloy C276 Hexagon Head Bolts
  • Hastelloy C276 Lifting Eye Bolts
  • Hastelloy C276 T Bolts
  • Hastelloy C276 Threaded Bolts

Types of Hastelloy C276 Nuts

  • Hastelloy C276 Flanged Nuts
  • Hastelloy C276 Hex Nuts
  • Hastelloy C276 Square Nuts
  • Hastelloy C276 T Nuts
  • Hastelloy C276 Nylock Nuts
  • Hastelloy C276 Lock Nuts
  • Hastelloy C276 Heavy Hex Nuts
  • Hastelloy C276 Jam Nuts
  • Hastelloy C276 Coupling Nuts
  • Hastelloy C276 Hex Cap Nuts
  • Hastelloy C276 Hex Flange Nuts
  • Hastelloy C276 Hex Weld Nuts
  • Hastelloy C276 Square Thin Nuts
  • Hastelloy C276 Square Weld Nuts
  • Hastelloy C276 Acorn Nuts
  • Hastelloy C276 Lifting Eye Nuts
  • Hastelloy C276 Wing Nuts
  • Hastelloy C276 T-Slot Nuts
  • Hastelloy C276 Nylock Jam Nuts
  • Hastelloy C276 K Lock Nuts
  • Hastelloy C276 2 Way Lock Nuts
  • Hastelloy C276 All Metal Lock Nuts
  • Hastelloy C276 Slotted Castle Nuts
  • Hastelloy C276 12 Point Flange Nuts
  • Hastelloy C276 Lug Nuts
  • Hastelloy C276 Open Lug Nuts
  • Hastelloy C276 Dome Nuts
  • Hastelloy C276 Hex Machine Screw Nuts
  • Hastelloy C276 Hex Lock Nuts Nylon Insert
  • Hastelloy C276 Hex Jam Nuts
  • Hastelloy C276 Hex Jam Nylon Lock Nuts
  • Hastelloy C276 Cap Nuts
  • Hastelloy C276 Prevailing Torque Lock Nuts
  • Hastelloy C276 Top Lock Nuts
  • Hastelloy C276 Pin-Lock Nuts
  • Hastelloy C276 Castle Nuts
  • Hastelloy C276 Flange Nuts Serrated
  • Hastelloy C276 Machine Hex Nuts
  • Hastelloy C276 Finished Hex Nuts
  • Hastelloy C276 Forged Eye Nut
  • Hastelloy C276 Rivet Nuts
  • Hastelloy C276 Slotted Hex Nuts
  • Hastelloy C276 Acme Hex Nuts
  • Hastelloy C276 Anco Locknuts
  • Hastelloy C276 Flexloc Nuts
  • Hastelloy C276 Reversible Lock Nuts
  • Hastelloy C276 Panel Nut
  • Hastelloy C276 Poly Nut
  • Hastelloy C276 Conelock Nut
  • Hastelloy C276 Self Clinching Nuts
  • Hastelloy C276 Domed Cap Nuts
  • Hastelloy C276 Imperial Thread Nuts
  • Hastelloy C276 Imperial Thread Nylock Nuts
  • Hastelloy C276 Sleeve Nuts
  • Hastelloy C276 Thin Nuts
  • Hastelloy C276 Weld Nuts
  • Hastelloy C276 High Nuts
  • Hastelloy C276 Cage Nuts
  • Hastelloy C276 Security Nuts
  • Hastelloy C276 Imperial Nuts
  • Hastelloy C276 Industrial Nuts
  • Hastelloy C276 Miscellaneous Nuts
  • Hastelloy C276 Insert Nuts
  • Hastelloy C276 Knurled Nuts
  • Hastelloy C276 Round Nuts

Types of Hastelloy C276 Screws

  • Hastelloy C276 Hex Cap Screws
  • Hastelloy C276 Socket Cap Screws
  • Hastelloy C276 Square Head Screws
  • Hastelloy C276 Flange Head Screws
  • Hastelloy C276 Button Head Screws
  • Hastelloy C276 Round Head Screws
  • Hastelloy C276 Oval Head Screws
  • Hastelloy C276 Hammer Head Screws
  • Hastelloy C276 Truss Head Screws
  • Hastelloy C276 Dome Head Screws
  • Hastelloy C276 Pan Head Screws
  • Hastelloy C276 Cheese Head Screws
  • Hastelloy C276 Knurled Head Screws
  • Hastelloy C276 Mushroom Head Screws
  • Hastelloy C276 Fillister Head Screws
  • Hastelloy C276 T Head Screws
  • Hastelloy C276 Countersunk Screws
  • Hastelloy C276 Set Screws
  • Hastelloy C276 Coach Screws
  • Hastelloy C276 Mating Screws
  • Hastelloy C276 Wood Screws
  • Hastelloy C276 Butterfly Screws
  • Hastelloy C276 Self Drilling SMS
  • Hastelloy C276 Thread Cutting
  • Hastelloy C276 Thread Forming
  • Hastelloy C276 Thumb Screws
  • Hastelloy C276 Self Tapping Screws
  • Hastelloy C276 Machined Screw
  • Hastelloy C276 Self Drilling Screws
  • Hastelloy C276 Phillips Head Screws

Types of Hastelloy C276 Washers

  • Hastelloy C276 Spring Washers
  • Hastelloy C276 Machined Washers
  • Hastelloy C276 Square Washers
  • Hastelloy C276 Plain Flat Washers
  • Hastelloy C276 Spring Lock Washers
  • Hastelloy C276 Tab Washers
  • Hastelloy C276 Internal Tab Washers
  • Hastelloy C276 Square Beveled Washers
  • Hastelloy C276 Hex Washers
  • Hastelloy C276 External Tooth Lock Washers
  • Hastelloy C276 Internal Tooth Lock Washers
  • Hastelloy C276 Curved Wave Washers
  • Hastelloy C276 Conical Spring Washers
  • Hastelloy C276 Self Locking Washers
  • Hastelloy C276 Dock Washers
  • Hastelloy C276 Fender Washers
  • Hastelloy C276 Ogee Washers
  • Hastelloy C276 Sealing Washers
  • Hastelloy C276 Countersunk Washers
  • Hastelloy C276 Finishing Washers

Key Technical Features

  • Exceptional Corrosion Resistance: High molybdenum content ensures resistance to pitting and crevice corrosion in chloride-rich environments such as seawater and brine solutions.
  • Multi-Environment Stability: Performs reliably in both oxidizing and reducing chemical conditions, reducing the need for material changes across different process zones.
  • High Temperature Capability: Maintains mechanical properties up to ~1040°C, making it suitable for heat exchangers and thermal processing units.
  • Stress Corrosion Cracking Resistance: Nickel-rich composition prevents chloride-induced stress corrosion cracking, a common failure mode in stainless steels.
  • Precision Threading: Manufactured to ISO and ASME tolerances, ensuring accurate fitment and load distribution in critical bolted joints.
  • Long Service Life: Reduced maintenance cycles due to minimal material degradation in aggressive chemical exposure.
  • Surface Integrity: Available with passivation and PTFE coatings to enhance surface protection and reduce galling during installation.
  • High Load Handling: Engineered to handle moderate to high tensile loads without deformation under cyclic stresses.

Industry Applications

Hastelloy C276 fasteners are used in industries requiring extreme corrosion resistance and long-term reliability under harsh chemical and thermal conditions.

  • Chemical Processing Plants — Used in reactors, agitators, and piping systems exposed to acids such as sulfuric and hydrochloric acid.
  • Offshore Oil & Gas Platforms — Secures structural components and subsea equipment exposed to seawater and chlorides.
  • Pollution Control Systems — Ideal for scrubbers and flue gas desulfurization units handling corrosive emissions.
  • Marine Engineering — Used in shipbuilding and desalination plants where saltwater corrosion is critical.
  • Pharmaceutical Equipment — Ensures contamination-free fastening in cleanroom and sterile processing systems.
  • Power Generation — Applied in heat exchangers and boiler systems with high-temperature exposure.
  • Pulp & Paper Industry — Used in bleaching equipment exposed to chlorine-based chemicals.
  • Aerospace Components — Suitable for high-performance assemblies requiring oxidation resistance.

Manufacturing & Quality Assurance

Hastelloy C276 fasteners are typically produced using hot forging followed by CNC machining to achieve precise dimensional tolerances. Thread rolling or cutting processes are carefully controlled to maintain mechanical integrity without inducing stress concentrations.

Quality checks include tensile testing, hardness verification, dimensional inspection using calibrated gauges, and surface finish evaluation. Each batch undergoes material traceability verification aligned with mill test certificates.

KK Fasteners follows ISO 9001-certified processes, ensuring every shipment meets international compliance requirements, including RoHS and REACH where applicable.

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Hastelloy C276 Fasteners - FAQs

Hastelloy C276 fasteners are high-performance nickel alloy fastening components designed for extreme corrosion resistance in chemical, marine, and high-temperature environments. They are commonly used in industries where standard stainless steel fasteners fail due to aggressive media exposure

These fasteners are made from UNS N10276 alloy, containing nickel, molybdenum, and chromium. This composition provides resistance to pitting, crevice corrosion, and stress corrosion cracking, making it suitable for highly corrosive applications.

Hastelloy C276 fasteners are manufactured according to ASTM B574, ASME SB574, DIN, and ISO standards. These ensure dimensional accuracy, mechanical strength, and compatibility with global engineering requirements.

Selection depends on application conditions such as chemical exposure, temperature, and load requirements. For chloride-rich or acidic environments, C276 is preferred due to its superior corrosion resistance compared to stainless steels.

Look for suppliers with ISO certification, material traceability, and global export experience. KK Fasteners supports international projects with documented quality checks and compliance with ASTM and ASME standards.

Hastelloy C276 Fasteners - Export Destination

Hastelloy C276 Fasteners in North America
Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States.
Hastelloy C276 Fasteners in South America
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.
Hastelloy C276 Fasteners in Europe
Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic (Czechia), Denmark, Estonia, Finland, France, Germany, Greece, Holy See, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom.
Hastelloy C276 Fastners in Asia
Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, Cyprus, Georgia, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Laos, Lebanon, Malaysia, Maldives, Mongolia, Myanmar, Nepal, Oman, Pakistan, Palestine, Philippines, Qatar, Saudi Arabia, Singapore, South Korea, Sri Lanka, State of Palestine, Syria, Taiwan, Tajikistan, Thailand, Timor-Leste, Turkey, Turkmenistan, United Arab Emirates, Uzbekistan, Vietnam, Yemen.
Hastelloy C276 Fasteners in Australia
Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.

For critical applications where corrosion resistance and reliability cannot be compromised, Hastelloy C276 fasteners provide a proven solution across industries. KK Fasteners supports global buyers with certified materials, precise manufacturing, and project-based supply capabilities. Contact the team to request a technical quote or discuss custom requirements for your next project.

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