Weston Stainless, a company headquartered in Midland, UK, is one of the main suppliers of top-quality stainless steel products, of which Stainless Steel 420 Fasteners are part. The fasteners are made from grade 420 stainless steel, a martensitic alloy that boasts superb hardness, resistance to corrosion, and wear. In forms of bolts, nuts, screws, washers, and studs, these fasteners offer reliability and durability for aggressive industrial uses. Their superior tensile strength and good machinability render them ideal for use in applications demanding superior mechanical performance and wear resistance, with long-lasting functionality in adverse conditions.
Stainless Steel 420 Fasteners consist of iron, 12-14% chromium for corrosion resistance, and 0.15-0.40% carbon for hardness and strength. They possess a tensile strength of around 700-900 MPa, yield strength of 500 MPa, and elongation of 10-15%, with good mechanical performance. Their density is 7.75 g/cm³, with a melting point of approximately 1450°C, allowing them to resist high temperature applications. Such fasteners also have good thermal conductivity and moderate resistance to oxidation, making them stable in harsh conditions.
| Specifications | ASTM A 193 / ASME SA 193 |
| Standard | DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards |
| Size | M3 – M100 | 3/6″ – 4″ | Custom Sizes |
| Fasteners Length | 3 mm – 200 mm | Custom Sizes |
| Nuts Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Threads available | UNF, BSW, BSF, METRIC, UNC, or as required |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Head | Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc. |
| Neck type | Hex, Square, Triangular, Oval & Knurled etc. |
| Surface Coating | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing. |
| Grade | C | Mn | Si | P | S | Cr |
| SS 420 | 0.15 max | 1.00 max | 1.00 max | 0.04 max | 0.03 max | 14.0 – 12.0 |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness Rockwell B (HR B) max | Hardness Brinell (HB) max |
| 420 | 480 | 275 | 16 | 95 | 201 |
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Good corrosion resistance in mild environments, making them suitable for various applications. Typically available in sizes ranging from M3 to M24, these nuts provide robust mechanical properties and are often used in low to moderate-corrosive settings.
Corrosion resistance, which is ideal for applications where exposure to mild corrosive agents is a concern. Common sizes range from M6 to M30, with lengths from 50mm to 300mm, offering strength and durability in fastening applications.
Moderately corrosion-resistant, making them suitable for general use in environments with low corrosive potential. They come in various sizes from M6 to M30 and lengths ranging from 20mm to 200mm, providing reliable performance in diverse applications.
Moderate corrosion resistance and are suitable for mild corrosive environments. Available in diameters from M6 to M30 and lengths from 100mm to 1000mm, these rods offer flexibility and strength for various industrial and construction applications.
Good corrosion resistance in less aggressive environments. They are typically available in sizes from M2 to M12 and have lengths ranging from 10mm to 100mm, making them suitable for general-purpose fastening in moderately corrosive conditions.
Moderate corrosion resistance and are suitable for applications with low corrosive exposure. They come in various sizes, typically from M3 to M24, with thicknesses ranging from 1mm to 5mm, ensuring proper load distribution and stability in fastening systems.
Stainless Steel 420 Fasteners find extensive applications in the aerospace, automotive, petrochemical, and marine engineering industries. They are best suited for applications demanding high strength and wear resistance, like pump shafts, turbine blades, industrial machinery, and surgical instruments. The fasteners also find applications in food processing machinery, valves, and precision instruments where corrosion resistance and strength are critical, guaranteeing long life and consistent performance in varied conditions.
Stainless Steel 420 Fasteners are accompanied by mill test certificates, third-party inspection reports, and material traceability documents to ensure quality. They are packed safely in wooden crates, plastic wraps, or cartons to avoid damage during shipping. Complete labeling and documentation allow easy identification, and shipping methods like air, sea, and land transport ensure safe and timely delivery globally.
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