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Pengkumta Fasteners, located in Bangkok, Thailand, makes high-strength Stainless Steel 420 Fasteners for demanding applications that need wear resistance and durability. As a martensitic stainless steel, 420 provides great hardness and strength after heat treatment. These fasteners are designed for industrial use where high mechanical performance is essential. Pengkumta ensures that each fastener meets international quality standards and undergoes strict testing. With corrosion resistance in mild environments and strong abrasion resistance, Stainless Steel 420 Fasteners are commonly used in automotive, aerospace, tooling, and machine part assemblies where precision and performance are crucial.
Stainless Steel 420 contains around 12–14% chromium and up to 0.35–0.40% carbon, providing hardness after heat treatment. Tensile strength can reach up to 860 MPa, with yield strength about 450 MPa. It is magnetic in all conditions and can be polished to a bright finish. Although not perfect for highly corrosive environments, it performs reliably in dry, mildly corrosive conditions. The excellent hardness, abrasion resistance, and good mechanical stability make 420 suitable for fasteners in wear-intensive applications.
| 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 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless Steel 420 fasteners are used in applications where high strength and corrosion resistance are crucial. They are ideal for automotive components, including engine parts and exhaust systems, as well as in construction and machinery where durability is needed. Their ability to withstand elevated temperatures and resist wear makes them suitable for industrial settings that demand reliable performance. Additionally, these fasteners are used in tools and equipment exposed to moderate corrosive conditions, ensuring longevity and robust functionality.
Stainless Steel 420 Fasteners are often used in valves, surgical tools, pumps, machine components, and molds. Their wear resistance makes them ideal for moving parts in mechanical systems, particularly in the automotive and aerospace sectors. These fasteners are also found in industrial kitchens and manufacturing settings where strength and moderate corrosion resistance are necessary.
Pengkumta Fasteners is a leading manufacturer and supplier of high-quality fasteners in Bangkok, Thailand, with over 8 years of experience serving global industries.
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