Wide Range of Carbon Steel Fasteners – Including Hex Bolts, Nuts, Washers, Screws, Studs & Threaded Rods in Grades 4.6, 5.6, 8.8, 10.9 & 12.9 with a Wide Range of Sizes and Surface Finishes.
We are an ISO 9001:2015 certified manufacturer and exporter of high-performance Carbon Steel Fasteners, delivering consistent quality and precision-engineered solutions globally. Our manufacturing facilities adhere to strict quality standards, enabling us to meet international requirements and project-specific specifications. Our fasteners comply with leading global norms including ASTM A307, A563, A325, A490, A194, and SAE J429, ensuring compatibility and reliability in critical applications.
Our product portfolio includes Hex Bolts, Hex Nuts, Washers, Screws, Studs, Threaded Rods, Socket Head Screws, U-Bolts, Anchor Bolts, and Eye Bolts, among others. We manufacture fasteners in both Metric (M2–M100) and Imperial (3/16" to 4") sizes, with custom lengths tailored to specific projects. We supply Carbon Steel Fasteners in various grades such as Grade 2, Grade 5, Grade 8, ASTM A307 Grade A & B, A325, A490, and B7/B7M. Available finishes and coatings include Zinc Plated (Yellow/White), Hot-Dip Galvanized (HDG), Black Oxide, Phosphating, Dacromet, and Geomet, offering excellent corrosion resistance and extended service life.
Carbon Steel Fasteners typically contain Carbon (up to 0.60%), Manganese (0.60–1.65%), along with trace elements like Phosphorus and Sulfur, tailored based on grade requirements. These chemical properties provide the fasteners with high tensile strength, durability, and resistance to mechanical stress. With superior load-bearing capacity and fatigue resistance, these fasteners are ideal for applications where strength, reliability, and cost-efficiency are critical.
Carbon Steel Fasteners are used across a broad range of sectors, including construction, structural steel fabrication, machinery, automotive, oil & gas, shipbuilding, power plants, and rail infrastructure. Their adaptability to different coatings and grades makes them suitable for both standard and high-stress environments. Benefits include cost-effectiveness, high strength-to-weight ratio, easy availability, and versatile applications, making them a go-to choice for industrial and commercial projects worldwide.
Durable Carbon Steel Fasteners (ASTM A307, A449, A563) – Offered in M2 to M100 Sizes with Coatings Including Hot Dip Galvanized, Zinc, and Black Oxide Finishes.
Carbon Steel Fasteners Specifications
| Product Name | Carbon Steel Fasteners |
|---|---|
| Standards | ASTM A193, A194, A307, A325, A354, A563, A449, A574, SAE J429, DIN, ISO, JIS |
| Grades | Grade 2, Grade 5, Grade 8, Class 4.6, 5.6, 8.8, 10.9, 12.9 |
| Types | Hex Bolts, Hex Nuts, Screws, Washers, Threaded Rods, Stud Bolts, Socket Head Cap Screws, Machine Screws, U-Bolts, Eye Bolts |
| Sizes | M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36 to M160| Custom Sizes Available |
| Length | 3mm to 500mm or as per customer requirement |
| Thread | UNC, UNF, BSW, BSF, Metric Coarse & Fine |
| Surface Finish | Plain, Zinc Plated (White, Yellow), Hot Dip Galvanized (HDG), Black Oxide, Phosphated, Dacromet |
| Finishing | Zinc (yellow, white, blue, black), black oxide, Geometry, Dacroment, anodizing, nickel plated, plated zinc-nickel, Stainless steel: Passivated Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Stainless Steel, Mechanically Applied coating and some special one like DACROMET |
| Coating Options | Black Oxide, Zinc, Teflon, PTFE, Dacromet, Galvanized, Phosphate |
| Application | Construction, Structural Steel, Automotive, Machinery, Oil & Gas, Heavy Engineering |
| Certifications | ISO 9001:2015, RoHS, CE, PED on request |
| Type | Bolts, Nuts, Sockets, Screws, Screw, Studs, Socket Screw, Hex Set Screw, Cap Screw, Machine Screw, Pan Head Screw, Allen Cap screw, Socket Head Cap Screw, Wing Screw, Spring Washers, Washers, Studs, Marine Anchors, Anchors, Hexagon Nut, Nut, Hex Coupling Nut, Hex Nut, Square Nut, Hex Domed Cap Nuts, Hex Head Bolts, Stud Bolts, Socket Hexagon Head Screw,U- Bolts, Anchor Bolt, Mushroom Head Square Neck Bolts, J Bolts, Wing Screw, T-Head Bolts, Foundation Bolts, Eye Bolt,Structural Bolts. |
Types of Carbon Steel Fasteners
Heat-treated for enhanced tensile strength and superior load-bearing performance.
Stud Bolts
Designed with full or partial threading for secure fastening in critical applications.
Equivalent of Carbon Steel Fasteners
| ASTM | SAE | ISO | JIS | BS | DIN |
|---|---|---|---|---|---|
| A307 | Grade 2 | Class 4.6 | SS330 | BS 4190 Gr 4.6 | DIN 931 / 933 |
| A325 | — | Class 8.8 | SS490 | BS 4395 Part 1 | DIN 6914 |
| A449 | Grade 5 | Class 8.8 | SS490 | BS 3692 Grade 8.8 | DIN 931 / 933 |
| A354 Grade BC | Grade 8 | Class 10.9 | SS540 | BS 3692 Grade 10.9 | DIN 912 |
| A574 | — | Class 12.9 | — | BS 4168 | DIN 912 |
| A563 | — | — | SS400 (Nuts) | BS 3692 | DIN 934 |
| — | Grade 2, 5, 8 | Class 4.6, 8.8, 10.9 | SS400, SS490 | BS 3692 | DIN 933 / 934 |
Chemical Composition of Carbon Steel Fasteners
| BS 970: 1955 | C% | FE | Si% | Mn% | Ni% | Cr% | Mo% | S% | P% |
|---|---|---|---|---|---|---|---|---|---|
| EN3B | 0.25Max | – | 0.35Max | 1.0Max | – | – | – | 0.06Max | 0.06Max |
| EN1A | 0.07/0.15 | – | 0.10Max. | 0.80/1.20 | – | – | – | 0.20/0.30 | 0.07Max |
| EN8 | 0.35/0.45 | – | 0.05/0.35 | 0.60/1.00 | – | – | – | 0.06Max | 0.06Max |
| EN9 | 0.50/0.60 | – | 0.05/0.35 | 0.50/0.80 | – | – | – | 0.06Max | 0.06Max |
| EN16 | 0.30/0.40 | – | 0.10/0.35 | 1.30/1.80 | – | – | 0.20/0.35 | 0.05Max | 0.05Max |
| EN19 | 0.35/0.45 | – | 0.10/0.35 | 0.50/0.80 | – | 0.90/1.50 | 0.20/0.40 | 0.05Max | 0.05Max |
| EN24 | 0.35/0.45 | – | 0.10/0.35 | 0.45/0.70 | 1.30/1.80 | 0.90/1.40 | 0.20/0.35 | 0.05Max | 0.05Max |
| Grade 1117 | 0.14-0.20 | 98.33-98.78 | – | 1.0-1.3 | – | – | – | 0.080-0.13 | Max 0.040 |
Mechanical Properties of Carbon Steel Fasteners
| Mechanical Properties ISO 898-1 Bolting | |||||||
| Grade | Material | Size Range | Tensile Strength MPa min. | Proof Strength MPa min. | Core Rockwell Hardness | Yield Strength MPa min. | |
| Min. | Max. | ||||||
| 4.6 | Low or Medium Carbon Steel | M5 – M39 3/16” – 1-1/2” | 400 | 225 | B67 | B99.5 | 240 |
| 8.8 | Medium Carbon Steel Q+T | M5 – M16 3/16” – 5/8” M18 – M39 11/16” – 1-1/2” | 800 830 | 580 600 | C22 C23 | C32 C34 | 640 660 |
| 10.9 | Alloy Steel Q+T | M5 – M39 3/16” – 1-1/2” | 1040 | 830 | C32 | C39 | 940 |
| 12.9 | Alloy Steel Q+T | M1.6 – M39 #0 – 1-1/2” | 1220 | 970 | C39 | C44 | 1100 |
Size chart of Low Temperature Carbon Steel Fasteners
| Carbon Steel Screws Type | SIZE | GRADE | ASME | ISO | ASTM |
|---|---|---|---|---|---|
| Socket Head Cap Screws | M1.6 to M64 | 12.9 | B18.3.1 M | 4762 | A574M |
| Socket Low Head Cap Screws | M4 to M20 | 10.9 | |||
| Socket Head Shoulder Screws | M6 to M24 | 012.9 | B18.3.3M | ||
| Countersunk Socket Head Screws | M3 to M20 | 012.9 | B18.3.5M | 10642 | F835M |
| Button Head Socket Screws | M3 to M12 | 012.9 | B18.3.4M | 7380 | F835M |
| Flange Button Head Socket Screws | M3 to M10 | 012.9 | F835M | ||
| Knurled Point Socket Set Screws | M3 to M20 | 45H | B18.3.6M | 4029 | F912M |
| Flat Point Socket Set Screws | M6 to M12 | 45H | B18.3.6M | 4026 | F912M |
| Dog Point Socket Set Screws | M3 to M20 | 45H | B18.3.6M | 4028 | F912M |
| Cone Point Socket Set Screws | M3 to M12 | 45H | B18.3.6M | 4027 | F912M |
| Plain Point Socket Set Screws | M3 to M20 | 45H | B18.3.6M | 4029 | F912M |
| Taper Pressure Plug | M8 to M22 | – |
| Carbon Steel Bolt Type | SIZE | PROPERTY CLASS | TENSILE STRENGTH | STANDARD |
|---|---|---|---|---|
| Carbon Steel Hex Head Bolt / Screws | M4 to M80 | 10.9 | 1040N / mm2 min |
ISO 4017 (Full Thread) ISO 4014 (Half Thread) |
| Carbon Steel Nuts Type | SIZE | PROPERTY CLASS | STANDARD |
|---|---|---|---|
| Hex Nut | M6 to M42 | 10 | ISO 4032 |
| Nylock Nut |
M6 to M20 (Gr.8) M10 to M24 (Gr.10) |
8 & `10 | DIN 982 |
| Nylock Nut |
M6 to M20 (Gr.8) M10 to M24 (Gr.10) |
8 & 10 | DIN 985 |
| Hex Weld Nut | M6 to M12 | 8 | DIN 929 |
| Carbon Steel Washers Type | SIZE | HARDNESS | STANDARD |
|---|---|---|---|
| Square Section Spring Washer, Carbon Steel | 3mm to 39mm | HV (430 to 530) | DIN 7980 |
| Flat Section Spring Washer, Carbon Steel | 3mm to 39mm | HV (430 to 530) | DIN 127 B |
| Hardened Washer, Carbon Steel | 12mm to 30mm | HV (300 to 370) | IS 2016 |
| Hardened Steel Washer, Carbon Steel | 12mm to 56mm |
Rockwell 26 to 45 (HDG) Rockwell 38 to 45 (Coated) |
ASTM F436M |
Carbon Steel Fasteners Weight Chart
| Length in mm | Metric Sizes (M5 to M22) and Weight in kg Half Thread MS Bolt with Nut | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | ||
| 16 | .448 | .743 | 1.59 | 3.211 | |||||||
| 20 | .598 | .812 | 1.711 | 3.411 | 4.892 | ||||||
| 25 | .66 | .897 | 1.871 | 3.66 | 5.252 | 8.17 | |||||
| 30 | .737 | 1.01 | 2.07 | 3.912 | 5.574 | 9.69 | 10.707 | 18.657 | |||
| 35 | .804 | 1.12 | 2.271 | 4.223 | 5.974 | 10 | 11.416 | 16.026 | 19.608 | ||
| 40 | .881 | 1.23 | 2.47 | 4.533 | 6.41 | 10.288 | 12.107 | 16.667 | 20.747 | ||
| 45 | .958 | 1.34 | 2.671 | 4.84 | 6.859 | 10.504 | 12.821 | 17.241 | 21.739 | ||
| 50 | 1.03 | 1.45 | 2.87 | 5.155 | 7.299 | 11.261 | 13.624 | 17.857 | 22.727 | 28.409 | |
| 55 | 1.56 | 3.071 | 5.464 | 7.74 | 11.628 | 14.409 | 18.868 | 23.81 | 30.12 | ||
| 60 | 1.67 | 3.27 | 5.774 | 8.183 | 12.255 | 15.244 | 20 | 25.126 | 32.051 | ||
| 65 | 1.781 | 3.472 | 6.083 | 8.621 | 12.626 | 16.026 | 21.008 | 26.455 | 34.014 | ||
| 70 | 1.89 | 3.671 | 6.394 | 9.058 | 12.987 | 16.835 | 22.124 | 27.778 | 35.461 | ||
| 75 | 2 | 3.873 | 6.702 | 9.506 | 13.228 | 17.606 | 23.256 | 29.07 | 39.063 | ||
| 80 | 2.111 | 4.072 | 7.013 | 10 | 13.889 | 18.248 | 24.51 | 30.303 | 40 | ||
| 90 | 4.472 | 7.634 | 10.917 | 14.925 | 19.841 | 26.042 | 33.113 | 41.667 | |||
| 100 | 4.873 | 8.251 | 11.82 | 16.34 | 21.459 | 27.778 | 35.714 | 46.296 | |||
| 110 | 8.881 | 12.723 | 17.73 | 23.041 | 31.25 | 38.168 | 47.17 | ||||
| 120 | 9.506 | 13.624 | 18.797 | 24.631 | 32.895 | 40.984 | 50 | ||||
| 130 | 10.101 | 14.535 | 20 | 26.316 | 34.722 | 43.478 | 52.632 | ||||
| 140 | 10.707 | 15.432 | 20.833 | 27.933 | 35.461 | 46.296 | 55.556 | ||||
| 150 | 11.312 | 16.34 | 22.222 | 29.412 | 37.594 | 48.544 | 58.824 | ||||
| 160 | 11.905 | 17.241 | 24.272 | 31.056 | 40.984 | 50.505 | 61.728 | ||||
| 170 | 12.5 | 18.116 | 32.68 | 53.191 | 64.935 | ||||||
| 180 | 13.123 | 19.011 | 26.882 | 34.247 | 55.556 | 67.568 | |||||
| 190 | 13.736 | 19.92 | 35.971 | 58.14 | 70.423 | ||||||
| 200 | 14.327 | 20.833 | 29.586 | 37.594 | 49.02 | 60.976 | 73.529 | ||||
| 220 | 15.528 | 22.624 | 40.65 | 65.789 | 79.365 | ||||||
| 240 | 16.722 | 24.51 | 43.86 | 71.429 | 84.746 | ||||||
| 250 | 17.301 | 25.381 | 45.455 | 74.627 | 87.719 | ||||||
| 260 | 17.921 | 26.316 | 47.17 | 76.923 | 90.909 | ||||||
| 280 | 19.157 | 28.09 | 50.505 | 81.967 | 98.039 | ||||||
| 300 | 20.325 | 29.94 | 53.763 | 87.719 | 104.167 | ||||||
| 320 | 31.646 | 56.818 | 92.593 | ||||||||
| 340 | 33.557 | 60.241 | 98.039 | ||||||||
| 360 | 35.211 | 63.291 | 104.167 | ||||||||
| 380 | 37.037 | 66.667 | 108.696 | ||||||||
| 400 | 39.063 | 69.444 | 113.636 | ||||||||
Worldwide Supply of Carbon Steel Fasteners
Russia, Bahrain, Cyprus, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Syria, Turkey, United Arab Emirates (UAE), Yemen, United States of America (USA), Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom, Vatican City.
