ASTM B366 Inconel 690 Fasteners
Inconel 690 Fasteners are high-performance fastening solutions designed for extreme environments, offering excellent resistance to oxidation and corrosion. These fasteners are commonly used in industries such as chemical processing, nuclear power plants, and marine engineering. Manufactured from a nickel-chromium alloy, Inconel 690 provides superior mechanical strength and durability in high-temperature applications.
What Are Inconel 690 Fasteners?
Inconel 690 are made from Inconel 690 alloy (UNS N06690, WNR 2.4642), a material known for its outstanding resistance to high-temperature oxidation and aqueous corrosion. These fasteners come in various types, including bolts, nuts, washers, and studs, to suit different industrial applications. They conform to ASTM B366 and ASME SB366 standards, ensuring high quality and reliability.

Key Features of ASTM B366 Inconel 690 Fasteners
- Superior Corrosion Resistance: With high chromium content, these fasteners resist oxidation and corrosion in both acidic and alkaline environments.
- High-Temperature Strength: Maintains mechanical integrity even at elevated temperatures.
- Oxidation Resistance: Performs well in environments with high levels of oxidizing agents.
- Excellent Fabricability: Can be easily machined, welded, and formed into various shapes.
- Long Service Life: Reduces maintenance costs due to superior durability and performance.
Types of Inconel 690 Fasteners
ASC LLP offers a wide range of Inconel 690 Fasteners, including:
1. UNS N06690 Bolts
- Hex Bolts
- Heavy Hex Bolts
- Carriage Bolts
- Flange Bolts
- Eye Bolts
2. WNR 2.4642 Nuts
- Hex Nuts
- Heavy Hex Nuts
- Lock Nuts
- Wing Nuts
- Flange Nuts
3. Inconel 690 Washers
- Plain Washers
- Spring Washers
- Lock Washers
4. Inconel 690 Studs & Threaded Rods
- Fully Threaded Studs
- Double End Studs
- Acme Threaded Rods


ASTM B366 Inconel 690 Fasteners Schedule and Size Chart
Nominal Size | Thread Pitch | Length Range (mm) | Diameter (mm) |
M6 | 1.0 mm | 10 – 100 | 6.0 |
M8 | 1.25 mm | 12 – 150 | 8.0 |
M10 | 1.5 mm | 16 – 200 | 10.0 |
M12 | 1.75 mm | 20 – 250 | 12.0 |
M16 | 2.0 mm | 25 – 300 | 16.0 |
ASME SA366 690 Fasteners Specifications Chart
Specification | Standard |
Material Grade | Inconel 690 (UNS N06690) |
Standards | ASTM B366, ASME SB366 |
Sizes | M6 – M16 and custom sizes |
Type | Bolts, Nuts, Washers, Studs |
Finish | Plain, Black, Zinc-Coated, Hot-Dip Galvanized |
Mechanical Properties of Inconel 690 Fasteners
Property | Value |
Tensile Strength | 550 MPa (min) |
Yield Strength | 240 MPa (min) |
Elongation | 30% (min) |
Hardness | 80 HRB (max) |
Chemical Composition of Inconel 690
Element | Composition (%) |
Nickel (Ni) | 58.0 – 63.0 |
Chromium (Cr) | 27.0 – 31.0 |
Iron (Fe) | Balance |
Carbon (C) | 0.05 max |
Manganese (Mn) | 0.50 max |
Silicon (Si) | 0.50 max |
Sulfur (S) | 0.015 max |
Physical Properties of Inconel 690
Property | Value |
Density | 8.19 g/cm³ |
Melting Point | 1343-1377°C |
Thermal Conductivity | 12.6 W/m·K |
Electrical Resistivity | 1.14 µΩ·m |
Applications of Inconel 690 Fasteners
Due to their exceptional properties, ASTM B366 Inconel 690 Fasteners are used in various industries:
- Nuclear Power Plants: Used in heat exchangers, steam generators, and reactor components.
- Chemical Processing: Suitable for use in corrosive environments involving strong acids and alkaline solutions.
- Marine Engineering: Resistant to seawater corrosion, making them ideal for offshore platforms and shipbuilding.
- Aerospace Industry: Used in jet engines and exhaust systems due to their high-temperature performance.
- Heat Treatment Equipment: Provides stability and strength in high-temperature environments.
Why Choose ASC LLP as Your Inconel 690 Fasteners Supplier?
ASC LLP is a trusted Inconel 690 Fasteners Supplier, offering high-quality products that meet international standards. Here’s why customers prefer us:
- Certified Products: We provide ASTM B366 and ASME SB366-compliant fasteners.
- Competitive Pricing: Best market prices with bulk order discounts.
- Global Supply Chain: Timely delivery across different countries.
- Quality Assurance: Rigorous testing and quality control measures.
- Expert Support: Technical assistance and customization options are available.
ASTM B366 690 Fasteners offers an ideal solution for industries requiring high-temperature strength, corrosion resistance, and durability. As a leading Inconel 690 Fasteners Supplier, ASC LLP ensures superior quality and reliability for demanding applications. Contact us today for premium-grade ASTM B366 Inconel Fasteners, ASME SB366 Inconel 690 Fasteners, and UNS N06690 Bolts at the best prices.
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