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Located in the vibrant industrial landscape of Kolkata, Rinku Fasteners has earned a strong reputation as a dependable manufacturer and supplier of high-performance Stainless Steel 17-4 PH Bolts. Serving customers across India, the company combines precision engineering with a genuine commitment to reliability and client satisfaction. Each bolt is crafted with care, ensuring consistent strength, corrosion resistance, and long-term durability. Rinku Fasteners takes a personal, customer-focused approach—listening to real project challenges and delivering solutions that truly support them. Their Stainless Steel 17-4 PH Bolts reflect both technical excellence and human-centred craftsmanship.
Stainless Steel 17-4 PH Bolts are made from a martensitic precipitation-hardening alloy containing chromium, nickel, and copper, giving them excellent strength and corrosion resistance. Their unique ability to be heat-treated enhances tensile and yield strength, while maintaining toughness across a range of temperatures. These bolts demonstrate exceptional hardness, fatigue resistance, and dimensional stability, even under heavy loads or prolonged stress. Their reliable mechanical profile makes them ideal for demanding environments where performance, longevity, and structural integrity are all essential.
| 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 |
| Bolts 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 |
| 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 | Cb+Ta | Cr | Cu | Fe | Mn | Ni | P | S | Si |
| SS 17-4 PH | 0.07 max | 0.15-0.45 | 15.00-17.50 | 3.00-5.00 | Bal | 1.0 max | 3.0-5.0 | 0.40 max | 0.03 max | 1.0 max |
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 17-4 PH Bolts are widely used in industries that require high-strength fasteners capable of withstanding pressure, heat, and corrosive environments. They are commonly found in aerospace components, chemical processing equipment, petrochemical plants, high-stress machinery, and marine applications. Their excellent mechanical stability makes them ideal for pump assemblies, valves, turbines, and structural systems exposed to dynamic forces. Thanks to their heat-treatable nature and dependable corrosion resistance, these bolts ensure safe, secure fastening in both indoor and outdoor conditions. Their versatility and durability make them a trusted choice for engineers seeking performance-driven fastening solutions.
Stainless steel 17-4 PH bolts undergo rigorous quality control to ensure exceptional performance. These tests include hardness testing, chemical analysis by spectroanalysis, material quality determination by PMI testing, tensile strength testing, impact testing, and fatigue resistance testing in addition to evaluating the corrosion resistance of each bolt and corrosion resistance. This exhaustive inspection ensures that our 17-4 PH bolts meet the highest industry standards for strength, durability and reliability.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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