Caliper Overseas is a reliable Stainless Steel Hex Bolts manufacturer and supplier in India, providing precision-engineered fastening solutions for various industries. These hex bolts, featuring a six-sided head, are crafted from corrosion-resistant stainless steel, making them perfect for secure and durable fastening. Our bolts are produced according to international standards, such as DIN931, ISO 4017, DIN, GB5783, ANSI, ASTM, EN, JIS, and AS, so that they become reliable and compatible in applications.
They are of high-strength, can resist rusting, and have the capability of withstanding high temperatures. Stainless steel hex bolts are highly used in building construction, the automotive industry, marine, machinery and structural applications because of their strength and tight grip. Whether industrial or commercial, these bolts provide consistent performance in adverse environments. Explore our range of stainless steel hex bolts and request a quote to meet your project needs with confidence!

| Metric Size | M2 to M42 |
|---|---|
| Inches | 1/4” to 2” |
| Lengths | 30″ maximum |
| Diameter | 1/2 – 1″ |
| Dimensional Standards: | ANSI B18.2.1, ANSI B18.2.3.1M, IS1364, ISO 4014, ISO 4017, DIN 933, DIN 931, BS 1083, BS 1768, ASME B18.2.1, JIS B1180, DIN 558, ISO 4018, DIN-EN14399-4, DIN 601, ISO 4016, CSN 21301, EU 24016, DIN 7968, DIN7990 |
| Threads | METRIC, BSW, UNC, UNF, BSF or as required |
| Unified Thread Standard (UTS) | UNC, UNF, NPT, UNS, UNEF, NPTF |
| Application | Wind Tower, Nuclear Power, Railway, Automotive Industry, Construction, Electronic Industry |
| Packaging | Cartoon Box / Wooden Pallet / Wooden Box / Thread Protector |
| Forming | Hot Forged Bolts & Cold Forged Bolts |
| Certification | Dual Certified As per ASTM & ASME Codes |
| Stainless steel Hex Head Bolt Dimensions (ANSI B18.2.1-1996) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Nominal Click on Size to Shop Products |
Body Diameter (E) |
Width |
Width Across Corners (G) | Head Height (H) |
Radius of Fillet (R) |
Thread |
|||||||||
| Max | Min | Basic | Max | Min | Max | Min | Basic | Max | Min | Max | Min | Basic (6 in. and shorter) | Basic (Over 6 in.) | ||
| 1/4 (0.2500) | 0.260 | 0.237 | 7/16 | 0.438 | 0.425 | 0.505 | 0.484 | 11/64 | 0.188 | 0.150 | 0.03 | 0.01 | 0.750 | 1.000 | |
| 5/16 (0.3125) | 0.324 | 0.298 | 1/2 | 0.500 | 0.484 | 0.577 | 0.552 | 7/32 | 0.235 | 0.195 | 0.03 | 0.01 | 0.875 | 1.125 | |
| 3/8 (0.3750) | 0.388 | 0.360 | 9/16 | 0.562 | 0.544 | 0.650 | 0.620 | 1/4 | 0.268 | 0.226 | 0.03 | 0.01 | 1.000 | 1.250 | |
| 1/2 (0.5000) | 0.515 | 0.482 | 3/4 | 0.750 | 0.725 | 0.866 | 0.826 | 11/32 | 0.364 | 0.302 | 0.03 | 0.01 | 1.250 | 1.500 | |
| 5/8 (0.6250) | 0.642 | 0.605 | 15/16 | 0.938 | 0.906 | 1.083 | 1.033 | 27/64 | 0.444 | 0.378 | 0.06 | 0.02 | 1.500 | 1.750 | |
| 3/4 (0.7500) | 0.768 | 0.729 | 1-1/8 | 1.125 | 1.088 | 1.299 | 1.240 | 1/2 | 0.524 | 0.455 | 0.06 | 0.02 | 1.750 | 2.000 | |
| 7/8 (0.8750) | 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 | 2.000 | 2.250 | |
| 1 (1.0000) | 1.022 | 0.976 | 1-1/2 | 1.500 | 1.450 | 1.732 | 1.653 | 43/64 | 0.700 | 0.591 | 0.09 | 0.03 | 2.250 | 2.500 | |
| D1D1 | K | E | S |
|---|---|---|---|
| M3 | 2 | 6.01 | 5.5 |
| M4 | 2.8 | 7.66 | 7 |
| M5 | 3.5 | 8.79 | 8 |
| M6 | 4 | 11.05 | 10 |
| M8 | 5.3 | 14.38 | 13 |
| M10 | 6.4 | 18.9 | 17 |
| M12 | 7.5 | 21.1 | 19 |
| M14 | 8.8 | 24.49 | 22 |
| M16 | 10 | 26.75 | 24 |
| M18 | 11.5 | 30.14 | 27 |
| M20 | 12.5 | 33.53 | 30 |
| M22 | 14 | 35.72 | 32 |
| M24 | 15 | 39.98 | 36 |
| M27 | 17 | 45.2 | 41 |
| M30 | 18.7 | 50.85 | 46 |
| M33 | 21 | 55.37 | 50 |
| M36 | 22.5 | 60.79 | 55 |
| M42 | 26 | 71.3 | 65 |
| M48 | 30 | 82.6 | 75 |
| Length | Diameter | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1⁄2" | 5⁄8" | 3⁄4" | 7⁄8" | 1" | 11⁄8" | 11⁄4" | 13⁄8 | 11⁄2 | |
| 1 | 16.5 | 29.4 | 47.0 | - | - | - | - | - | - |
| 11⁄4 | 17.8 | 31.3 | 49.6 | 74.4 | 104 | - | - | - | - |
| 11⁄2 | 19.2 | 33.1 | 52.2 | 78 | 109 | 148 | 197 | - | - |
| 13⁄4 | 20.5 | 35.3 | 55.3 | 81.9 | 114 | 154 | 205 | 261 | 333 |
| 2 | 21.9 | 37.4 | 58.4 | 86.1 | 119 | 160 | 212 | 270 | 344 |
| 21⁄4 | 23.3 | 39.8 | 61.6 | 90.3 | 124 | 167 | 220 | 279 | 355 |
| 21⁄2 | 24.7 | 41.7 | 64.7 | 94.6 | 130 | 174 | 229 | 290 | 366 |
| 23⁄4 | 26.1 | 43.9 | 67.8 | 98.8 | 135 | 181 | 237 | 300 | 379 |
| 3 | 27.4 | 46.1 | 70.9 | 103 | 141 | 188 | 246 | 310 | 391 |
| 31⁄4 | 28.8 | 48.2 | 74 | 107 | 146 | 195 | 255 | 321 | 403 |
| 31⁄2 | 30.2 | 50.4 | 77.1 | 111 | 151 | 202 | 263 | 332 | 416 |
| 33⁄4 | 31.6 | 52.5 | 80.2 | 116 | 157 | 209 | 272 | 342 | 428 |
| 4 | 33 | 54.7 | 83.3 | 120 | 162 | 216 | 280 | 353 | 441 |
| 41⁄4 | 34.3 | 56.9 | 86.4 | 124 | 168 | 223 | 289 | 363 | 453 |
| 41⁄2 | 35.7 | 59 | 89.5 | 128 | 173 | 230 | 298 | 374 | 465 |
| 43⁄4 | 37.1 | 61.2 | 92.7 | 133 | 179 | 237 | 306 | 384 | 478 |
| 5 | 38.5 | 63.3 | 95.8 | 137 | 184 | 244 | 315 | 395 | 490 |
| 51⁄4 | 39.9 | 65.5 | 98.9 | 141 | 190 | 251 | 324 | 405 | 503 |
| 51⁄2 | 41.2 | 67.7 | 102 | 146 | 196 | 258 | 332 | 416 | 515 |
| 53⁄4 | 42.6 | 69.8 | 105 | 150 | 201 | 265 | 341 | 426 | 527 |
| 6 | 44 | 71.9 | 108 | 154 | 207 | 272 | 349 | 437 | 540 |
| 61⁄4 | - | 74.1 | 111 | 158 | 212 | 279 | 358 | 447 | 552 |
| 61⁄2 | - | 76.3 | 114 | 163 | 218 | 286 | 367 | 458 | 565 |
| 63⁄4 | - | 78.5 | 118 | 167 | 223 | 293 | 375 | 468 | 577 |
| 7 | - | 80.6 | 121 | 171 | 229 | 300 | 384 | 479 | 589 |
| 71⁄4 | - | 82.8 | 124 | 175 | 234 | 307 | 392 | 489 | 602 |
| 71⁄2 | - | 84.9 | 127 | 179 | 240 | 314 | 401 | 500 | 614 |
| 73⁄4 | - | 87.1 | 130 | 183 | 246 | 321 | 410 | 510 | 626 |
| 8 | - | 89.2 | 133 | 187 | 251 | 328 | 418 | 521 | 639 |
| 81⁄4 | - | - | - | 192 | 257 | 335 | 427 | 531 | 651 |
| 81⁄2 | - | - | - | 196 | 262 | 342 | 435 | 542 | 664 |
| 83⁄4 | - | - | - | - | - | - | 444 | 552 | 676 |
| 9 | - | - | - | - | - | - | 453 | 563 | 689 |
| Per inch Adder |
5.5 | 8.6 | 12.4 | 16.9 | 22.1 | 28 | 34.4 | 42.5 | 49.7 |
| F436 Round Washers | 2.1 | 3.6 | 4.8 | 7 | 9.4 | 11.3 | 13.8 | 16.8 | 20 |
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