| Customization: | Available |
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| Material: | High Strength Steel |
| Type: | Hexagon Head |
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| Hex Bolt/Hex Head Bolt | |
| Standard | ANSI/ASME B18.2.1, or customized |
| Diameter | 1/4''-20, or customized |
| Length | 3/4'', or customized |
| Grade | 8 (40Cr) |
| Finish | Plain/Black Oxide/Blue-White Zinc/Zinc Plated(Clear/Blue/Yellow/Black)/Nickel/Chrome/Dacromet/Zinc Nickel |
| Packing | Cartons (26*26*14 cm) + Pallets (113*85 cm), or customized |
| Application | Steel structure/Building/Mechanical machine/Automobile/Interior Design |
| Trade Term | FOB/CIF/CFR/EXW/CIP |
| Payment | T/T, D/A , D/P ,West union,Paypal.etc |
| Lead Time | 3~15 days after the order is confirmed, it will be based on the detailed order quantity |
| Market | Europe / North America / Southeast Asia / Middle East / Australia, etc |
| Warranty | We confirm our goods will satisfy your request of 100% |
| After Sales Service | We will follow up on the goods for every customer and help solve problems after sales |
ASME B18.2.1 Hex Bolts
| Nominal Size or Basic product Diameter (Inches) | Full-Size Body Diameter, E | Width Across Flats, F | Width Across Corners, G | Head Height, H | Radius of Fillet, R | Thread Length for Bolt Lengths, LT | ||||||||
| 6 inches & Shorter | Over 6 inches | |||||||||||||
| Max. | Min. | Basic | Max. | Min. | Max. | Min. | Basic | Max. | Min. | Max. | Min. | Nom. | Nom. | |
| 1/4" | 0.26 | 0.237 | 7/16" | 0.438 | 0.425 | 0.505 | 0.484 | 11/64" | 0.188 | 0.15 | 0.03 | 0.01 | 0.75 | 1 |
| 0.25 | ||||||||||||||
| 5/16" | 0.324 | 0.298 | 1/2" | 0.5 | 0.484 | 0.577 | 0.552 | 7/32" | 0.235 | 0.195 | 0.03 | 0.01 | 0.875 | 1.125 |
| 0.3125 | ||||||||||||||
| 3/8" | 0.388 | 0.36 | 9/16" | 0.562 | 0.544 | 0.65 | 0.62 | 1/4" | 0.268 | 0.226 | 0.03 | 0.01 | 1 | 1.25 |
| 0.375 | ||||||||||||||
| 7/16" | 0.452 | 0.421 | 5/8" | 0.625 | 0.603 | 0.722 | 0.687 | 19/64" | 0.316 | 0.272 | 0.03 | 0.01 | 1.125 | 1.375 |
| 0.4375 | ||||||||||||||
| 1/2" | 0.515 | 0.482 | 3/4" | 0.75 | 0.725 | 0.866 | 0.826 | 11/32" | 0.364 | 0.302 | 0.03 | 0.01 | 1.25 | 1.5 |
| 0.5 | ||||||||||||||
| 5/8" | 0.642 | 0.605 | 15/16" | 0.938 | 0.906 | 1.083 | 1.033 | 27/64" | 0.444 | 0.378 | 0.06 | 0.02 | 1.5 | 1.75 |
| 0.625 | ||||||||||||||
| 3/4" | 0.768 | 0.729 | 1-1/8" | 1.125 | 1.088 | 1.299 | 1.24 | 1/2" | 0.524 | 0.455 | 0.06 | 0.02 | 1.75 | 2 |
| 0.75 | ||||||||||||||
| 7/8" | 0.895 | 0.852 | 1-5/16" | 1.312 | 1.269 | 1.516 | 1.447 | 37/64" | 0.604 | 0.531 | 0.06 | 0.02 | 2 | 2.25 |
| 0.875 | ||||||||||||||
| 1" | 1.022 | 0.976 | 1-1/2" | 1.5 | 1.45 | 1.732 | 1.653 | 43/64" | 0.7 | 0.591 | 0.09 | 0.03 | 2.25 | 2.5 |
| 1 | ||||||||||||||
| 1-1/8" | 1.149 | 1.098 | 1-11/16" | 1.688 | 1.631 | 1.949 | 1.859 | 3/4" | 0.78 | 0.658 | 0.09 | 0.03 | 2.5 | 2.75 |
| 1.125 | ||||||||||||||
| 1-1/4" | 1.277 | 1.223 | 1-7/8" | 1.875 | 1.812 | 2.165 | 2.066 | 27/32" | 0.876 | 0.749 | 0.09 | 0.03 | 2.75 | 3 |
| 1.25 | ||||||||||||||
| 1-3/8" | 1.404 | 1.345 | 2-1/16" | 2.062 | 1.994 | 2.382 | 2.273 | 29/32" | 0.94 | 0.81 | 0.09 | 0.03 | 3 | 3.25 |
| 1.375 | ||||||||||||||
| 1-1/2" | 1.531 | 1.47 | 2-1/4" | 2.25 | 2.175 | 2.598 | 2.48 | 1" | 1.036 | 0.902 | 0.09 | 0.03 | 3.25 | 3.5 |
| 1.5 | ||||||||||||||
| 1-5/8" | 1.658 | 1.591 | 2-7/16" | 2.438 | 2.356 | 2.815 | 2.616 | 1-3/32" | 1.116 | 0.978 | 0.09 | 0.03 | 3.5 | 3.75 |
| 1.625 | ||||||||||||||
| 1-3/4" | 1.785 | 1.716 | 2-5/8" | 2.625 | 2.538 | 3.031 | 2.893 | 1-5/32" | 1.196 | 1.054 | 0.12 | 0.04 | 3.75 | 4 |
| 1.75 | ||||||||||||||
| 1-7/8" | 1.912 | 1.839 | 2-13/16" | 2.812 | 2.719 | 3.248 | 3.099 | 1-1/4" | 1.276 | 1.13 | 0.12 | 0.04 | 4 | 4.25 |
| 1.875 | ||||||||||||||
| 2" | 2.039 | 1.964 | 3" | 3 | 2.9 | 3.464 | 3.306 | 1-11/32" | 1.388 | 1.175 | 0.12 | 0.04 | 4.25 | 4.5 |
| 2 | ||||||||||||||
| 2 1/4" | 2.305 | 2.214 | 3-3/8" | 3.375 | 3.262 | 3.897 | 3.719 | 1-1/2" | 1.548 | 1.327 | 0.19 | 0.06 | 4.75 | 5 |
| 2.25 | ||||||||||||||
| 2 1/2" | 2.559 | 2.461 | 3-3/4" | 3.75 | 3.625 | 4.33 | 4.133 | 1-21/32" | 1.708 | 1.479 | 0.19 | 0.06 | 5.25 | 5.5 |
| 2.5 | ||||||||||||||
| 2-3/4" | 2.827 | 2.711 | 4-1/8" | 4.125 | 3.988 | 4.763 | 4.546 | 1-13/16" | 1.869 | 1.632 | 0.19 | 0.06 | 5.75 | 6 |
| 2.75 | ||||||||||||||
| 3" | 3.081 | 2.961 | 4-1/2" | 4.5 | 4.35 | 5.196 | 4.959 | 2" | 2.06 | 1.815 | 0.19 | 0.06 | 6.25 | 6.5 |
| 3 | ||||||||||||||
| 3-1/4" | 3.335 | 3.21 | 4-7/8" | 4.875 | 4.712 | 5.629 | 5.372 | 2-3/16" | 2.251 | 1.936 | 0.19 | 0.06 | 6.75 | 7 |
| 3.25 | ||||||||||||||
| 3-1/2" | 3.589 | 3.461 | 5-1/4" | 5.25 | 5.075 | 6.062 | 5.786 | 2-5/16" | 2.38 | 2.057 | 0.19 | 0.06 | 7.25 | 7.5 |
| 3.5 | ||||||||||||||
| 3-3/4" | 3.858 | 3.726 | 5-5/8" | 5.625 | 5.437 | 6.495 | 6.198 | 2-1/2" | 2.572 | 2.241 | 0.19 | 0.06 | 7.75 | 8 |
| 3.75 | ||||||||||||||
| 4" | 4.111 | 3.975 | 6" | 6 | 5.8 | 6.928 | 6.612 | 2-11/16" | 2.764 | 2.424 | 0.19 | 0.06 | 8.25 | 8.5 |
| 4 | ||||||||||||||
Established in 2004, we are a professional fastener manufacturer based in Hangzhou, China. With almost 20 years of industry experience, we specialize in producing a wide range of imperial and metric fasteners, including DIN, ANSI, ASME, ISO, JIS, BSW, and more. Our product portfolio also extends to CUSTOM fasteners to meet specific requirements. Over the years, we have successfully exported our products to Europe, North America, and other regions, helping numerous suppliers and manufacturers expand their markets.
1. Bolts: hex head bolts, hex socket bolts, carriage bolts, flange bolts, etc
2. Screws: machine screws, self-drilling screws, set screws, 12.9 shoulder screws, hex head wood screws, self-tapping screws, etc
3. Nuts: hex nuts, k-nuts/k-lock nuts, nylon inserted nuts, stamped metal self-locking nuts, hex flange nuts, cap nuts, rivet nuts, etc
4.Non-standard fasteners: semi-hollow rivets, step rivets, etc
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