Phanuphong Steel and Plates, a top-notch manufacturer and supplier based in Bangkok, Thailand, specializes in high-quality **Carbon Steel 8.8 Fasteners**. These fasteners are perfect for industrial, mechanical, and structural applications that demand strength and reliability. With a reputation for precision manufacturing and a commitment to international standards, Phanuphong Steel ensures that every fastener performs consistently, even in tough conditions. Whether you’re working on construction, machinery, automotive, or engineering projects, these Carbon Steel 8.8 Fasteners offer a fantastic blend of toughness, durability, and accuracy. Catering to both local and international markets, the company delivers versatile and cost-effective fastening solutions that promise long-lasting performance and dependable connections across a wide range of industrial applications.
The **Carbon Steel 8.8 Fasteners** are made from medium carbon steel that undergoes quenching and tempering to achieve impressive tensile strength. They boast a minimum tensile strength of 800 MPa and a yield strength of 640 MPa, along with excellent hardness, toughness, and resistance to deformation. These fasteners are designed to maintain their shape under mechanical stress and heavy loads. Thanks to their uniform microstructure and outstanding mechanical properties, they are perfect for applications that require reliable performance, structural integrity, and durability—especially in automotive, machinery, construction, and industrial projects where fastening reliability is crucial.
| Carbon Steel 8.8 | C | Mn | Si | P | S | B |
| 0.25-0.55 | 0.25 | 0.035 | 0.035 | 0.003 |
| Yield strength | Tensile strength | Elongation | Reduction | Hardness |
| Mpa | Mpa | % | % | HRC |
| min | min | min | min | |
| 660 | 830 | 12 | 35 | 23-34 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Phanuphong Steel is a trustworthy manufacturer and supplier of quality Carbon Steel 8.8 Fasteners in Bangkok, Thailand. We specialize in top-grade steel products like Carbon Steel, Alloy Steel, Mild Steel, and Galvanized Steel, with the main focus being on Carbon Steel Sheets and Plates. Our vast inventory also includes Pipes, Tubes, Flanges, Forged Fittings, and Bars. Committed to fast delivery and excellent customer service, we use only the finest raw materials to deliver excellent strength, durability, and performance for high-demand industrial uses. Contact us today for all your Carbon Steel 8.8 Fasteners needs!
| DIA | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 |
| Pitch | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | ||||||||
| Grade A upto length | 40 | 50 | 60 | 80 | 100 | 120 | 140 | 150 | Grade A not applicable to these dia’s | ||||||||||||
| Head Across Flat (S) Nom = Max Min Grade A Grade B | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
| 6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 33.38 | 35.38 | Grade A not applicable to these dia’s | |||||||||
| 6.64 | 7.64 | 9.64 | 12.57 | 15.57 | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 33 | 35 | 40 | 45 | 49 | 53.8 | 58.8 | 63.1 | 68.1 | 73.1 | 78.1 | |
| Head Height (K) Nom Tol + or – Grade A Grade B | 2.8 | 3.5 | 4 | 5.3 | 6.4 | 7.5 | 8.8 | 10 | 11.5 | 12.5 | 14 | 15 | 17 | 18.7 | 21 | 22.5 | 25 | 26 | 28 | 30 | 33 |
| 0.125 | 0.15 | 0.18 | 0.215 | Grade A not applicable to these dia’s | |||||||||||||||||
| 0.2 | 0.24 | 0.29 | 0.35 | 0.42 | 0.5 | ||||||||||||||||
| Across corners e Min Grade A Grade B | 7.66 | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.36 | 26.75 | 30.14 | 33.53 | 37.72 | 39.98 | Grade A not applicable to these dia’s | ||||||||
| 7.5 | 8.63 | 10.89 | 14.2 | 17.59 | 19.85 | 22.78 | 26.17 | 29.56 | 32.95 | 37.29 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 71.3 | 76.95 | 82.6 | 88.25 | |
| Major Dia at thread (min) | 3.838 | 4.826 | 5.794 | 7.76 | 9.732 | 11.701 | 13.682 | 15.682 | 17.623 | 19.623 | 21.623 | 23.577 | 26.577 | 29.522 | 32.522 | 35.465 | 38.465 | 41.437 | 44.437 | 47.399 | 51.399 |
| Major Dia at thread (max) | 3.978 | 4.976 | 5.974 | 7.972 | 9.968 | 11.966 | 13.962 | 15.962 | 17.958 | 19.958 | 21.958 | 23.952 | 26.952 | 29.947 | 32.947 | 35.94 | 38.94 | 41.937 | 44.937 | 47.929 | 51.929 |
| Thread Length (b) For lengths < or = 125mm For lengths > 125mm <= 200mm For lengths > 200mm | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 | 46 | 50 | 54 | 60 | 66 | Not specified as full thread recommended | ||||||
| 20 | 22 | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | 66 | 72 | 78 | 84 | 90 | 96 | 102 | 108 | 116 | |
| 33 | 35 | 37 | 41 | 45 | 49 | 53 | 57 | 61 | 65 | 69 | 73 | 79 | 85 | 91 | 97 | 103 | 109 | 115 | 121 | 129 | |
You’ll find **Carbon Steel 8.8 Fasteners** widely used in construction, automotive, machinery manufacturing, structural frameworks, and heavy engineering projects. They’re ideal for bolting high-load joints, assembling mechanical components, and creating structural connections in industrial equipment. With their combination of high strength, toughness, and precise dimensions, these fasteners ensure safe, long-lasting, and secure connections. Praised for their reliability, performance, and cost-effectiveness, Carbon Steel 8.8 Fasteners are a go-to choice for many industries.
Phanuphong Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Bangkok, Thailand.
Copyright 2025 Phanuphong Steel. All rights reserved
