JiangYin XiangGu Hardware Products Co.,Ltd
JiangYin XiangGu Hardware Products Co.,Ltd Focus on supplying high quality fasteners.
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Drawing:
| Hex bolts | ||||||||
| ASME/ANSI B18.2.1-2010 | ||||||||
 | ||||||||
| d(ich) | ds(ich) | s(ich) | k(ich) | b(ich) | ||||
| min | max | min | max | min | max | L≤6 | L>6 | |
| 1/4 | 0.237 | 0.26 | 0.425 | 0.438 | 0.15 | 0.188 | 0.75 | 1 |
| 5/16 | 0.298 | 0.324 | 0.484 | 0.5 | 0.195 | 0.235 | 0.875 | 1.125 |
| 3/8 | 0.36 | 0.388 | 0.544 | 0.562 | 0.226 | 0.268 | 1 | 1.25 |
| 7/16 | 0.421 | 0.452 | 0.603 | 0.625 | 0.272 | 0.316 | 1.125 | 1.375 |
| 1/2 | 0.482 | 0.515 | 0.725 | 0.75 | 0.302 | 0.364 | 1.25 | 1.5 |
| 5/8 | 0.605 | 0.642 | 0.905 | 0.938 | 0.378 | 0.444 | 1.5 | 1.75 |
| 3/4 | 0.729 | 0.768 | 1.088 | 1.125 | 0.455 | 0.524 | 1.75 | 2 |
| 7/8 | 0.852 | 0.895 | 1.269 | 1.312 | 0.531 | 0.604 | 2 | 2.25 |
| 1 | 0.976 | 1.022 | 1.45 | 1.5 | 0.591 | 0.7 | 2.25 | 2.5 |
| 1-1/8 | 1.098 | 1.149 | 1.631 | 1.688 | 0.658 | 0.78 | 2.5 | 2.75 |
| 1-1/4 | 1.223 | 1.277 | 1.812 | 1.875 | 0.749 | 0.876 | 2.75 | 3 |
| 1-3/8 | 1.345 | 1.404 | 1.994 | 2.062 | 0.81 | 0.94 | 3 | 3.25 |
| 1-1/2 | 1.47 | 1.531 | 2.175 | 2.25 | 0.902 | 1.036 | 3.25 | 3.5 |
| 1-5/8 | 1.591 | 1.658 | 2.356 | 2.438 | 0.978 | 1.116 | 3.5 | 3.75 |
| 1-3/4 | 1.716 | 1.785 | 2.538 | 2.625 | 1.054 | 1.196 | 3.75 | 4 |
| 1-7/8 | 1.839 | 1.912 | 2.719 | 2.812 | 1.13 | 1.276 | 4 | 4.25 |
| 2 | 1.964 | 2.039 | 2.9 | 3 | 1.175 | 1.388 | 4.25 | 4.5 |
| 2-1/4 | 2.214 | 2.305 | 3.262 | 3.375 | 1.327 | 1.548 | / | 5 |
| 2-1/2 | 2.461 | 2.559 | 3.625 | 3.75 | 1.479 | 1.708 | / | 5.5 |
| 2-3/4 | 2.711 | 2.827 | 3.988 | 4.125 | 1.632 | 1.869 | / | 6 |
| 3 | 2.961 | 3.081 | 4.35 | 4.5 | 1.815 | 2.06 | / | 6.5 |
| 3-1/4 | 3.21 | 3.335 | 4.712 | 4.875 | 1.936 | 2.251 | / | 7 |
| 3-1/2 | 3.461 | 3.589 | 5.075 | 5.25 | 2.057 | 2.38 | / | 7.5 |
| 3-3/4 | 3.726 | 3.858 | 5.437 | 5.625 | 2.241 | 2.572 | / | 8 |
| 4 | 3.975 | 4.111 | 5.8 | 6 | 2.424 | 2.764 | / | 8.5 |
Made from Grade 5 steel, these screws are suitable for fastening most machinery and equipment. Dimensions meet ASME B18.2.1 specifications. Grade 5 steel hex head screws are marked with three radial lines. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments. Black ultra-corrosion-resistant-coated steel screws resist chemicals and withstand 1,000 hours of salt spray per ASTM B117. To maintain corrosion resistance, use these screws with black ultra-corrosion-resistant-coated nuts and washers.
Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Screws that meet ASTM A449 or SAE J429 comply with specifications and testing requirements for material quality.
Mechanical Properties:
| Mechanical Properties | Grade 5 |
| Tensile Load | 120000psi |
| Yield strength | 92000psi |
| Hardness | Rockwell 25-34 |
| Elongation in 4D min. | 14% |
| Reduction of area min. | 35% |