Hex bolts are among the fasteners that are most widely accessible in various marketplaces. They are not only incredibly adaptable, but a producer may create them utilising a variety of Ansi B18 2.1 Bolts Dimensions. Asme B18.2.1 is a standard that covers nine different products including square bolts, Asme B18.2.1 Hex Bolts, and screws in the inch series. Although used synonymously, there are some differences that separate Asme B18.2.1 Bolts And Screws.
While they are both externally threaded fasteners meant to be placed into holes during assembly, for instance, the design of asAnsi/asme B18.2.1 Heavy Hex Boltallows it to be either released or tightened by turning a nut. On the other hand, a screw is meant to be assembled using a matched nut that may or may not contain an internal thread that has already been produced. So, by just turning a screw's head, it may be released or tightened.
Keeping in accordance with the standard, any product manufactured, including the Hexagon Bolts Ansi B18.2.1 is intended to be plated or unplated. Since the standard is an ASME one, producers are obligated to adhere to particular guidelines. Asme B18 2.1 Stud Bolts. ASME standards take the following points into consideration width across the flats, head height, body diameter, length tolerances of the Asme B18.2.1 Bolts, thread lengths, as well as general dimensional tolerances.
Dimensions |
ASME B18.2.1, B18.3 |
|---|---|
Melt Origin |
South America/East Europe/JapanKorea/ |
Product Origin |
Made in India |
Threads Configuration |
ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads |
Certification |
Dual Certified As per ASTM & ASME Codes |
Additional Certifications |
PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
Mandatory Requirements |
Free from Mercury & Radioactive Contamination |
Additional Requirements |
NACE MR0103 / MR0175 / ISO 15156 Compliance |
| Nominal Size or Basic product Diameter |
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 in. and Shorter | Over 6 in. | ||||||||||||||
| Max | Min | Basic | Max | Min | Max | Min | Basic | Max | Min | Max | Min | Nom | Nom | ||
| 3/8 | 0.3750 | 0.388 | 0.360 | 11/6 | 0.688 | 0.669 | 0.794 | 0.763 | 1/4 | 0.268 | 0.226 | 0.03 | 0.01 | 1.000 | 1.250 |
| 1/2 | 0.5000 | 0.515 | 0.482 | 7/8 | 0.875 | 0.850 | 1.010 | 0.969 | 11/32 | 0.364 | 0.302 | 0.03 | 0.01 | 1.250 | 1.500 |
| 5/8 | 0.6250 | 0.642 | 0.605 | 11/16 | 1.062 | 1.031 | 1.227 | 1.175 | 27/64 | 0.444 | 0.378 | 0.06 | 0.02 | 1.500 | 1.750 |
| 3/4 | 0.7500 | 0.768 | 0.729 | 1 1/4 | 1.250 | 1.212 | 1.443 | 1.383 | 1/2 | 0.524 | 0.455 | 0.06 | 0.02 | 1.750 | 2.000 |
| 7/8 | 0.8750 | 0.895 | 0.852 | 1 7/16 | 1.438 | 1.394 | 1.660 | 1.589 | 37/64 | 0.604 | 0.531 | 0.06 | 0.02 | 2.000 | 2.250 |
| 1 | 1.000 | 1.022 | 0.976 | 1 5/8 | 1.625 | 1.575 | 1.876 | 1.796 | 43/64 | 0.700 | 0.591 | 0.09 | 0.03 | 2.250 | 2.500 |
| 1 1/8 | 1.1250 | 1.149 | 1.098 | 1 13/16 | 1.812 | 1.756 | 2.093 | 2.002 | 3/4 | 0.780 | 0.658 | 0.09 | 0.03 | 2.500 | 2.750 |
| 1 1/4 | 1.2500 | 1.277 | 1.223 | 2 | 2.000 | 1.938 | 2.309 | 2.209 | 27/32 | 0.876 | 0.749 | 0.09 | 0.03 | 2.750 | 3.000 |
| 1 3/8 | 1.3750 | 1.404 | 1.345 | 2 3/16 | 2.188 | 2.119 | 2.526 | 2.416 | 29/32 | 0.940 | 0.810 | 0.09 | 0.03 | 3.000 | 3.250 |
| 1 1/2 | 1.5000 | 1.531 | 1.470 | 2 3/8 | 2.375 | 2.300 | 2.742 | 2.622 | 1 | 1.036 | 0.902 | 0.09 | 0.03 | 3.250 | 3.500 |
| 1 5/8 | 1.6250 | 1.658 | 1.591 | 2 9/16 | 2.562 | 2.481 | 2.959 | 2.829 | 1 3/32 | 1.116 | 0.978 | 0.09 | 0.03 | 3.500 | 3.750 |
| 1 3/4 | 1.7500 | 1.785 | 1.716 | 2 3/4 | 2.750 | 2.662 | 3.175 | 3.035 | 1 5/32 | 1.196 | 1.054 | 0.12 | 0.04 | 3.750 | 4.000 |
| 1 7/8 | 1.8750 | 1.912 | 1.839 | 2 15/16 | 2.938 | 2.844 | 3.392 | 3.242 | 1 1/4 | 1.276 | 1.130 | 0.12 | 0.04 | 4.000 | 4.250 |
| 2 | 2.000 | 2.039 | 1.964 | 3 1/8 | 3.125 | 3.025 | 3.608 | 3.449 | 1 11/32 | 1.388 | 1.175 | 0.12 | 0.04 | 4.250 | 4.500 |
| 2 1/4 | 2.2500 | 2.305 | 2.214 | 3 1/2 | 3.500 | 3.388 | 4.041 | 3.862 | 1 1/2 | 1.548 | 1.327 | 0.19 | 0.06 | 4.750 | 5.000 |
| 2 1/2 | 2.5000 | 2.559 | 2.461 | 3 7/8 | 3.875 | 3.750 | 4.474 | 4.275 | 1 21/32 | 1.708 | 1.479 | 0.19 | 0.06 | 5.250 | 5.500 |
| 2 3/4 | 2.7500 | 2.827 | 2.711 | 4 1/4 | 4.250 | 4.112 | 4.907 | 4.688 | 1 13/16 | 1.869 | 1.632 | 0.19 | 0.06 | 5.750 | 6.000 |
| 3 | 3.000 | 3.081 | 2.961 | 4 5/8 | 4.625 | 4.475 | 5.340 | 5.102 | 2 | 2.060 | 1.815 | 0.19 | 0.06 | 6.250 | 6.500 |
| Material Standards for ASME B18.2.1 Fasteners | |
|---|---|
| ASTM A193 | Standard specification for alloy steel and stainless steel bolting materials for high temperature or high pressure service and other special purpose applications |
| ASTM A307 | Standard specification for carbon steel bolts and studs, 60000 psi tensile strength |
| ASTM A320 | Standard specification for alloy steel and stainless steel bolting for low-temperature service |
| ASTM A354 | Standard specification for quenched and tempered alloy steel bolts, studs, and other externally threaded fasteners |
| ASTM A449 | Standard specification for hex cap screws, bolts and studs, steel, heat treated, 120/105/90 ksi minimum tensile strength, general use |
| ASTM F468 | Standard specification for nonferrous bolts, hex cap screws, and studs for general use |
| ASTM F593 | Standard specification for stainless steel bolts, hex cap screws, and studs |
| MIL-F-18240 | Fastener element, self-locking, threaded fastener, 250°F Maximum |
| SAE J429 | Mechanical and material requirements for externally threaded fasteners |
