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Punit Fasteners stands as a leading manufacturer, supplier and exporter specializing in high quality stainless steel 347H nuts in Delhi, India. Recognizing our unwavering commitment to providing durable and reliable fasteners that meet the strictest industry standards, we offer a wide range of sizes to suit a variety of applications in a variety of industries. We pride ourselves on providing versatile solutions that excel in performance and longevity, ensuring we deliver superior packaging solutions tailor-made to meet our customers specific technical needs.
Punit Fasteners, a Delhi, India-based established manufacturer and supplier of Stainless Steel 347H Nuts for high-performance fastening of applications exposed to high ambient temperature and corrosive conditions. These nuts are produced from stabilized austenitic stainless steel alloy and provide superior resistance to intergranular corrosion, sulfide stress cracking, and acidic media. With exceptional mechanical strength, resistance to heat up to 900°C, and low maintenance requirements, they are well suited for applications in aerospace, chemical plants, power generation, and nuclear industries. At Punit Fasteners, we meet every nut with the highest standards of quality, ensuring durability, safety, and reliability in harsh industrial environments.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| 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 | ||||
| 347H | 515 | 205 | 40 | 92 | 201 |
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
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 347H Nuts consist of iron, 17–19% chromium, 9–13% nickel, and columbium (niobium), which ensures superior stabilization against intergranular corrosion. The 347H grade includes a greater content of carbon, which improves high-temperature strength. These nuts possess good tensile strength, creep resistance, and oxidation resistance in applications up to 900°C (1652°F). Their chemical and structural stability due to the austenitic grades makes them highly compatible with welded assemblies, while their mechanical properties provide long-term functionality against thermal stress, vibration, and exposure to acid, especially in industrial, aerospace, and petrochemical applications.
Stainless Steel 347H Nuts are vital elements in high-heat and corrosive conditions, including chemical plants, where they secure equipment with exposure to acidic gases and chloride solutions. In the aerospace industry, they safely couple components exposed to intense heat and mechanical stress. Their resistance to sulfide stress corrosion cracking is high and thus they are worth using in oil and gas industries, while their heat and radiation resistance favors use in nuclear reactors. The nuts find application in electrical, pharmaceutical, and marine industries, where there is a need for durability, accuracy, and resistance to fatigue and oxidation.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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