Mitchell Stainless is a well-respected manufacturer and supplier of high-performance Stainless Steel 440C fasteners based in Hamilton, New Zealand. Renowned for their precision engineering and rigorous quality control, this company provides fasteners that meet the toughest industrial standards. Stainless Steel 440C is prized for its remarkable hardness, wear resistance, and strength, making it perfect for critical applications. Mitchell Stainless blends cutting-edge manufacturing techniques with deep industry knowledge to offer dependable bolts, nuts, screws, and custom fasteners. With a strong commitment to consistency, durability, and customer satisfaction, they cater to a variety of industries both in New Zealand and around the globe.
Stainless Steel 440C is a high-carbon martensitic stainless steel that contains about 0.95–1.20% carbon and 16–18% chromium, along with small amounts of manganese and silicon. This unique composition provides excellent hardenability and corrosion resistance compared to regular carbon steels. When heat treated, 440C fasteners achieve impressive hardness, strength, and wear resistance. They also exhibit good fatigue performance, moderate corrosion resistance in mild environments, and the ability to maintain sharp edges and dimensional stability even under mechanical stress.
Specification : ASTM A193 / ASME SA193
Dimensions : ASME B18.2.1, ASME B18.3, DIN 931, DIN 933, DIN 934, DIN 7991, DIN 976
Standard : DIN, GB, BS, ISO, IS, JIS, ASTM, ASME, EN, etc.
Size : M02 to M33
Length : 3 mm to 200 mm
Threads : ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Types : Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Spring Washers, Studs, Anchors, Marine Anchors, Nut, Hexagon Nut, Hex Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Socket Hexagon Head Screw Anchor Bolt, U- Bolts, J Bolts, Mushroom Head Square Neck Bolts, T-Head Bolts, Wing Screw, Eye Bolt, Foundation Bolts, Structural Bolts.
| Grade | C | Mn | Si | P | S | Cr | |
| 440C | min. | 0.95 – 1.20 | – | – | – | – | 16.0 |
| max. | 0.12 | 1.0 | 1.00 | 0.04 | 0.030 | 18.0 | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 440C | 758 | 448 | 14 | 95 | – |
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These nuts offer high corrosion resistance and excellent strength due to the high carbon content in 440c stainless steel. They are available in sizes ranging from M3 to M48 and meet various industrial standards for dimensions and tolerances.
440c Stud Bolts provide exceptional corrosion resistance and high tensile strength. They come in diameters from M6 to M30 and lengths from 50mm to 1000mm, suitable for demanding applications requiring precision and durability.
440c Bolts are ideal for harsh environments and offer superior corrosion resistance and high strength. They are available sizes from M5 to M36, with varying lengths and thread specifications to meet diverse application needs.
These threaded rods are known for their excellent corrosion resistance and high tensile strength. They are typically available in diameters from M6 to M30 and lengths up to 3000mm, suitable for use in various industrial settings.
440c screws provide robust corrosion resistance and high strength. Commonly available in sizes from M3 to M20, lengths varying based on application needs, they are ideal for precision and heavy-duty fastening tasks.
440C washers offer outstanding corrosion resistance and durability, making them ideal for distributing loads and protecting surfaces. They are available in sizes from M3 to M36 and come in various thicknesses to meet specific application needs. Their robust properties ensure reliable performance in demanding environments.
At Mitchell Stainless we ensure that our Stainless Steel 440C Fasteners undergo rigorous quality tests, including Hardness Test, PMI Testing, Chemical Analysis, and IGC Test, to guarantee excellence. We provide detailed documentation such as invoices with HS codes, packaging lists, Certificates of Origin, and Guarantee Letters. Additionally, Third-Party Inspection Certificates ensure complete client satisfaction and reliability.
Stainless Steel 440C fasteners are commonly used in applications that demand high strength, hardness, and wear resistance. They are perfect for aerospace components, automotive assemblies, precision machinery, bearings, valves, and tooling equipment. These fasteners are reliable in high-load and high-stress situations where durability is crucial. Additionally, they find applications in medical instruments, pumps, and industrial equipment that require precise dimensions and a long service life. Mitchell Stainless provides 440C fasteners for scenarios where mechanical performance, reliability, and consistent quality are of utmost importance.







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