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Pengkumta Fasteners, a reputable manufacturer and supplier based in Bangkok, Thailand, is renowned for delivering top-notch Stainless Steel 321 / 321H Bolts that meet international industrial standards. These bolts are prized for their impressive corrosion resistance, strength, and stability even at high temperatures. Crafted with precision and rigorous quality control, they promise long-lasting performance in critical applications. With a strong focus on advanced manufacturing, timely delivery, and customer satisfaction, Pengkumta Fasteners has built a solid reputation as a dependable supplier of Stainless Steel 321 / 321H Bolts for both local and global markets.
The composition of Stainless Steel 321 / 321H Bolts includes iron, 17–19% chromium, 9–12% nickel, and titanium, which helps prevent intergranular corrosion. The 321H variant features a higher carbon content, enhancing its creep strength and durability in high-temperature settings. These bolts boast a tensile strength of around 515 MPa and a yield strength of about 205 MPa. They retain toughness, oxidation resistance, and stability in environments reaching up to 870°C, ensuring reliable mechanical performance under heat and corrosive conditions.
| 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 Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347 | min. | – | – | – | – | – | 17.0 | 2.00 | 9.0 | – |
| max. | 0.08 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 3.00 | 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 | ||||
| 347 | 515 | 205 | 40 | 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 321 / 321H Bolts find extensive use in industries that demand high-temperature stability and corrosion resistance. In petrochemical and chemical processing facilities, they are commonly used for piping, reactors, and pressure vessels. The power generation sector employs them in boilers, heat exchangers, and superheaters that face thermal stress. Additionally, they are utilized in the aerospace and automotive industries for exhaust systems and high-heat components. Furthermore, marine, construction, and food processing sectors benefit from their durability and resistance, making these bolts a trusted fastening solution for tough operating environments.
At Pengkumta Fasteners we ensure the highest standards in packaging for our Stainless Steel 321/321H bolts. Each bolt is thoroughly inspected and protectively wrapped to prevent damage during transport. They are then placed in tightly labeled boxes with product details and detailed quantities. Our packaging products are designed to be environmentally and physically friendly, ensuring that your high-performance bolts arrive in optimal condition and ready for immediate use.
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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