O-Ring Sizing Chart: AS568
Industry standard sizes are defined by Aerospace Standard AS568, Aerospace Size Standard for O-Rings. The document, published by Society of Automotive Engineers, provides a list of O-Ring sizes and their associated “-“ numbers.
|
1/16″ Cross-Section |
||
| AS568- |
I.D. |
O.D. |
| 004 |
5/64″ |
13/64″ |
| 005 |
3/32″ |
7/32″ |
| 006 |
1/8″ |
1/4″ |
| 007 |
5/32″ |
9/32″ |
| 008 |
3/16″ |
5/16″ |
| 009 |
7/32″ |
11/32″ |
| 010 |
1/4″ |
3/8″ |
| 011 |
5/16″ |
7/16″ |
| 012 |
3/8″ |
1/2″ |
| 013 |
7/16″ |
9/16″ |
| 014 |
1/2″ |
5/8″ |
| 015 |
9/16″ |
11/16″ |
| 016 |
5/8″ |
3/4″ |
| 017 |
11/16″ |
13/16″ |
| 018 |
3/4″ |
7/8″ |
| 019 |
13/16″ |
15/16″ |
| 020 |
7/8″ |
1″ |
| 021 |
15/16″ |
1-1/16″ |
| 022 |
1″ |
1-1/8″ |
| 023 |
1-1/16″ |
1-3/16″ |
| 024 |
1-1/8″ |
1-1/4″ |
| 025 |
1-3/16″ |
1-5/16″ |
| 026 |
1-1/4″ |
1-3/8″ |
| 027 |
1-5/16″ |
1-7/16″ |
| 028 |
1-3/8″ |
1-1/2″ |
| 029 |
1-1/2″ |
1-5/8″ |
| 030 |
1-5/8″ |
1-3/4″ |
| 031 |
1-3/4″ |
1-7/8″ |
| 032 |
1-7/8″ |
2″ |
| 033 |
2″ |
2-1/8″ |
| 034 |
2-1/8″ |
2-1/4″ |
| 035 |
2-1/4″ |
2-3/8″ |
| 036 |
2-3/8″ |
2-1/2″ |
| 037 |
2-1/2″ |
2-5/8″ |
| 038 |
2-5/8″ |
2-3/4″ |
| 039 |
2-3/4″ |
2-7/8″ |
| 040 |
2-7/8″ |
3″ |
| 041 |
3″ |
3-1/8″ |
| 042 |
3-1/4″ |
3*3/8″ |
| 043 |
3-1/2″ |
3-5/8″ |
| 044 |
3-3/4″ |
3-7/8″ |
| 045 |
4″ |
4-1/8″ |
| 046 |
4-1/4″ |
4-3/8″ |
| 047 |
4-1/2″ |
4-5/8″ |
| 048 |
4-3/4″ |
4-7/8″ |
| 049 |
5″ |
5-1/8″ |
| 050 |
5-1/4″ |
5-3/8″ |
|
3/16″ Cross-Section |
||
| AS568- |
I.D. |
O.D. |
| 309 |
7/16″ |
13/16″ |
| 310 |
1/2″ |
7/8″ |
| 311 |
9/16″ |
15/16″ |
| 312 |
5/8″ |
1″ |
| 313 |
11/16″ |
1-1/16″ |
| 314 |
3/4″ |
1-1/8″ |
| 315 |
13/16″ |
1-3/16″ |
| 316 |
7/8″ |
1-1/4″ |
| 317 |
15/16″ |
1-5/16″ |
| 318 |
1″ |
1-3/8″ |
| 319 |
1-1/16″ |
1-7/16″ |
| 320 |
1-1/8″ |
1-1/2″ |
| 321 |
1-3/16″ |
1-9/16″ |
| 322 |
1-1/4″ |
1-5/8″ |
| 323 |
1-5/16″ |
1-11/16″ |
| 324 |
1-3/8″ |
1-3/4″ |
| 325 |
1-1/2″ |
1-7/8″ |
| 326 |
1-5/8″ |
2″ |
| 327 |
1-3/4″ |
2-1/8″ |
| 328 |
1-7/8″ |
2-1/4″ |
| 329 |
2″ |
2-3/8″ |
| 330 |
2-1/8″ |
2-1/2″ |
| 331 |
2-1/4″ |
2-5/8″ |
| 332 |
2-3/8″ |
2-3/4″ |
| 333 |
2-1/2″ |
2-7/8″ |
| 334 |
2-5/8″ |
3″ |
| 335 |
2-3/4″ |
3-1/8″ |
| 336 |
2-7/8″ |
3-1/4″ |
| 337 |
3″ |
3-3/8″ |
| 338 |
3-1/8″ |
3-1/2″ |
| 339 |
3-1/4″ |
3-5/8″ |
| 340 |
3-3/8″ |
3-3/4″ |
| 341 |
3-1/2″ |
3-7/8″ |
| 342 |
3-5/8″ |
4″ |
| 343 |
3-3/4″ |
4-1/8″ |
| 344 |
3-7/8″ |
4-1/4″ |
| 345 |
4″ |
4-3/8″ |
| 346 |
4-1/8″ |
4-1/2″ |
| 347 |
4-1/4″ |
4-5/8″ |
| 348 |
4-3/8″ |
4-3/4″ |
| 349 |
4-1/2″ |
4-7/8″ |
| 350 |
4-5/8″ |
5″ |
| 351 |
4-3/4″ |
5-1/8″ |
| 352 |
4-7/8″ |
5-1/4″ |
| 353 |
5″ |
5-3/8″ |
| 354 |
5-1/8″ |
5-1/2″ |
| 355 |
5-1/4″ |
5-5/8″ |
| 356 |
5-3/8″ |
5-3/4″ |
| 357 |
5-1/2″ |
5-7/8″ |
| 358 |
5-5/8″ |
6″ |
| 359 |
5-3/4″ |
6-1/8″ |
| 360 |
5-7/8″ |
6-1/4″ |
| 361 |
6″ |
6-3/8″ |
| 362 |
6-1/4″ |
6-5/8″ |
| 363 |
6-1/2″ |
6-7/8″ |
| 364 |
6-3/4″ |
7-1/8″ |
| 365 |
7″ |
7-3/8″ |
| 366 |
7-1/4″ |
7-5/8″ |
| 367 |
7-1/2″ |
7-7/8″ |
| 368 |
7-3/4″ |
8-1/8″ |
| 369 |
8″ |
8-3/8″ |
| 370 |
8-1/4″ |
8-5/8″ |
| 371 |
8-1/2″ |
8-7/8″ |
| 372 |
8-3/4″ |
9-1/8″ |
| 373 |
9″ |
9-3/8″ |
| 374 |
9-1/4″ |
9-5/8″ |
| 375 |
9-1/2″ |
9-7/8″ |
| 376 |
9-3/4″ |
10-1/8″ |
| 377 |
10″ |
10-3/8″ |
| 378 |
10-1/2″ |
10-7/8″ |
| 379 |
11″ |
11-3/8″ |
| 380 |
11-1/2″ |
11-7/8″ |
| 381 |
12″ |
12-3/8″ |
| 382 |
13″ |
13-3/8″ |
| 383 |
14″ |
14-3/8″ |
| 384 |
15″ |
15-3/8″ |
| 385 |
16″ |
16-3/8″ |
| 386 |
17″ |
17-3/8″ |
| 387 |
18″ |
18-3/8″ |
| 388 |
19″ |
19-3/8″ |
| 389 |
20″ |
20-3/8″ |
| 390 |
21″ |
21-3/8″ |
| 391 |
22″ |
22-3/8″ |
| 392 |
23″ |
22-3/8″ |
| 393 |
24″ |
24-3/8″ |
| 394 |
25″ |
25-3/8″ |
| 395 |
26″ |
26-3/8″ |
|
1/8″ Cross-Section |
||
| AS568- |
I.D. |
O.D. |
| 201 |
3/16″ |
7/16″ |
| 202 |
1/4″ |
1/2″ |
| 203 |
5/16″ |
9/16″ |
| 204 |
3/8″ |
5/8″ |
| 205 |
7/16″ |
11/16″ |
| 206 |
1/2″ |
3/4″ |
| 207 |
9/16″ |
13/16″ |
| 208 |
5/8″ |
7/8″ |
| 209 |
11/16″ |
15/16″ |
| 210 |
3/4″ |
1″ |
| 211 |
13/16″ |
1-1/16″ |
| 212 |
7/8″ |
1-1/8″ |
| 213 |
15/16″ |
1-3/16″ |
| 214 |
1″ |
1-1/4″ |
| 215 |
1-1/16″ |
1-5/16″ |
| 216 |
1-1/8″ |
1-3/8″ |
| 217 |
1-3/16″ |
1-7/16″ |
| 218 |
1-1/4″ |
1-1/2″ |
| 219 |
1-5/16″ |
1-9/16″ |
| 220 |
1-3/8″ |
1-5/8″ |
| 221 |
1-7/16″ |
1-11/16″ |
| 222 |
1-1/2″ |
1-3/4″ |
| 223 |
1-5/8″ |
1-7/8″ |
| 224 |
1-3/4″ |
2″ |
| 225 |
1-7/8″ |
2-1/8″ |
| 226 |
2″ |
2*1/4″ |
| 227 |
2-1/8″ |
2-3/8″ |
| 228 |
2-1/4″ |
2-1/2″ |
| 229 |
2-3/8″ |
2-5/8″ |
| 230 |
2-1/2″ |
2-3/4″ |
| 231 |
2-5/8″ |
2-7/8″ |
| 232 |
2-3/4″ |
3″ |
| 233 |
2-7/8″ |
3-1/8″ |
| 234 |
3″ |
3-1/4″ |
| 235 |
3-1/8″ |
3-3/8″ |
| 236 |
3-1/4″ |
3-1/2″ |
| 237 |
3-3/8″ |
3-5/8″ |
| 238 |
3-1/2″ |
3-3/4″ |
| 239 |
3-5/8″ |
3-7/8″ |
| 240 |
3-3/4″ |
4″ |
| 241 |
3-7/8″ |
4-1/8″ |
| 242 |
4″ |
4-1/4″ |
| 243 |
4-1/8″ |
4-3/8″ |
| 244 |
4-1/4″ |
4-1/2″ |
| 245 |
4-3/8″ |
4-5/8″ |
| 246 |
4-1/2″ |
4-3/4″ |
| 247 |
4-5/8″ |
4-7/8″ |
| 248 |
4-3/4″ |
5″ |
| 249 |
4-7/8″ |
5-1/8″ |
| 250 |
5″ |
5-1/4″ |
| 251 |
5-1/8″ |
5-3/8″ |
| 252 |
5-1/4″ |
5-1/2″ |
| 253 |
5-3/8″ |
5-5/8″ |
| 254 |
5-1/2″ |
5-3/4″ |
| 255 |
5-5/8″ |
5-7/8″ |
| 256 |
5-3/4″ |
6″ |
| 257 |
5-7/8″ |
6-1/8″ |
| 258 |
6″ |
6-1/4″ |
| 259 |
6-1/4″ |
6-1/2″ |
| 260 |
6-1/2″ |
6-3/4″ |
| 261 |
6-3/4″ |
7″ |
| 262 |
7″ |
7-1/4″ |
| 263 |
7-1/4″ |
7-1/2″ |
| 264 |
7-1/2″ |
7-3/4″ |
| 265 |
7-3/4″ |
8″ |
| 266 |
8″ |
8-1/4″ |
| 267 |
8-1/4″ |
8-1/2″ |
| 268 |
8-1/2″ |
8-3/4″ |
| 269 |
8-3/4″ |
9″ |
| 270 |
9″ |
9-1/4″ |
| 271 |
9-1/4″ |
9-1/2″ |
| 272 |
9-1/2″ |
9-3/4″ |
| 273 |
9-3/4″ |
10″ |
| 274 |
10″ |
10-1/4″ |
| 275 |
10-1/2″ |
10-3/4″ |
| 276 |
11″ |
11-1/4″ |
| 277 |
11-1/2″ |
11-3/4″ |
| 278 |
12″ |
12-1/4″ |
| 279 |
13″ |
13-1/4″ |
| 280 |
14″ |
14-1/4″ |
| 281 |
15″ |
15-1/4″ |
| 282 |
16″ |
16-1/4″ |
| 283 |
17″ |
17-1/4″ |
| 284 |
18″ |
18-1/4″ |
|
3/32″ Cross-Section |
||
| AS568- |
I.D. |
O.D. |
| 102 |
1/16″ |
1/4″ |
| 103 |
3/32″ |
9/32″ |
| 104 |
1/8″ |
5/16″ |
| 105 |
5/32″ |
11/32″ |
| 106 |
3/16″ |
3/8″ |
| 107 |
7/32″ |
13/32″ |
| 108 |
1/4″ |
7/16″ |
| 109 |
5/16″ |
1/2″ |
| 110 |
3/8″ |
9/16″ |
| 111 |
7/16″ |
5/8″ |
| 112 |
1/2″ |
11/16″ |
| 113 |
9/16″ |
3/4″ |
| 114 |
5/8″ |
13/16″ |
| 115 |
11/16″ |
7/8″ |
| 116 |
3/4″ |
15/16″ |
| 117 |
13/16″ |
1″ |
| 118 |
7/8″ |
1-1/16″ |
| 119 |
15/16″ |
1-1/8″ |
| 120 |
1″ |
1-3/16″ |
| 121 |
1-1/16″ |
1-1/4″ |
| 122 |
1-1/8″ |
1-15/16″ |
| 123 |
1-3/16″ |
1-3/8″ |
| 124 |
1-1/4″ |
1-7/16″ |
| 125 |
1-5/16″ |
1-1/2″ |
| 126 |
1-3/8″ |
1-9/16″ |
| 127 |
1-7/16″ |
1-5/8″ |
| 128 |
1-1/2″ |
1-11/16″ |
| 129 |
1-9/16″ |
1-3/4″ |
| 130 |
1-5/8″ |
1-13/16″ |
| 131 |
1-11/16″ |
1-7/8″ |
| 132 |
1-3/4″ |
1-15/16″ |
| 133 |
1-13/16″ |
2″ |
| 134 |
1-7/8″ |
2-1/16″ |
| 135 |
1-15/16″ |
2-1/8″ |
| 136 |
2″ |
2-3/16″ |
| 137 |
2-1/16″ |
2-1/4″ |
| 138 |
2-1/8″ |
2-5/16″ |
| 139 |
2-3/16″ |
2-3/8″ |
| 140 |
2-1/4″ |
2-7/16″ |
| 141 |
2-5/16″ |
2-1/2″ |
| 142 |
2-3/8″ |
2-9/16″ |
| 143 |
2-7/16″ |
2-5/8″ |
| 144 |
2-1/2″ |
2-11/16″ |
| 145 |
2-9/16″ |
2-3/4″ |
| 146 |
2-5/8″ |
2-13/16″ |
| 147 |
2-11/16″ |
2-7/8″ |
| 148 |
2-3/4″ |
2-15/16″ |
| 149 |
2-13/16″ |
3″ |
| 150 |
2-7/8″ |
3-1/16″ |
| 151 |
3″ |
3-3/16″ |
| 152 |
3-1/4″ |
3-7/16″ |
| 153 |
3-1/2″ |
3-11/16″ |
| 154 |
3-3/4″ |
3-15/16″ |
| 155 |
4″ |
4-3/16″ |
| 156 |
4-1/4″ |
4-7/16″ |
| 157 |
4-1/2″ |
4-11/16″ |
| 158 |
4-3/4″ |
4-15/16″ |
| 159 |
5″ |
5-3/16″ |
| 160 |
5-1/4″ |
5-7/16″ |
| 161 |
5-1/2″ |
5-11/16″ |
| 162 |
5-3/4″ |
5-13/16″ |
| 163 |
6″ |
6-3/16″ |
| 164 |
6-1/4″ |
6-7/16″ |
| 165 |
6-1/2″ |
6-11/16″ |
| 166 |
6-3/4″ |
6-15/16″ |
| 167 |
7″ |
7-3/16″ |
| 168 |
7-1/4″ |
7-7/16″ |
| 169 |
7-1/2″ |
7-11/16″ |
| 170 |
7-3/4″ |
7-15/16″ |
| 171 |
8″ |
8-3/16″ |
| 172 |
8-1/4″ |
8-7/16″ |
| 173 |
8-1/2″ |
8-11/16″ |
| 174 |
8-3/4″ |
8-15/16″ |
| 175 |
9″ |
9-3/16″ |
| 176 |
9-1/4″ |
9-7/16″ |
| 177 |
9-1/2″ |
9-11/16″ |
| 178 |
9-3/4″ |
9-15/16″ |
|
1/4″ Cross-Section |
||
| AS568- |
I.D. |
O.D. |
| 425 |
4-1/2″ |
5″ |
| 426 |
4-5/8″ |
5-1/8″ |
| 427 |
4-3/4″ |
5-1/4″ |
| 428 |
4-7/8″ |
5-3/8″ |
| 429 |
5″ |
5-1/2″ |
| 430 |
5-1/8″ |
5-5/8″ |
| 431 |
5-1/4″ |
5-3/4″ |
| 432 |
5-3/8″ |
5-7/8″ |
| 433 |
5-1/2″ |
6″ |
| 434 |
5-5/8″ |
6-1/8″ |
| 435 |
5-3/4″ |
6-1/4″ |
| 436 |
5-7/8″ |
6-3/8″ |
| 437 |
6″ |
6-1/2″ |
| 438 |
6-1/4″ |
6-3/4″ |
| 439 |
6-1/2″ |
7″ |
| 440 |
6-3/4″ |
7-1/4″ |
| 441 |
7″ |
7-1/2″ |
| 442 |
7-1/4″ |
7-3/4″ |
| 443 |
7-1/2″ |
8″ |
| 444 |
7-3/4″ |
8-1/4″ |
| 445 |
8″ |
8-1/2″ |
| 446 |
8-1/2″ |
9″ |
| 447 |
9″ |
9-1/2″ |
| 448 |
9-1/2″ |
10″ |
| 449 |
10″ |
10-1/2″ |
| 450 |
10-1/2″ |
11″ |
| 451 |
11″ |
11-1/2″ |
| 452 |
11-1/2″ |
12″ |
| 453 |
12″ |
12-1/2″ |
| 454 |
12-1/2″ |
13″ |
| 455 |
13″ |
13-1/2″ |
| 456 |
13-1/2″ |
14″ |
| 457 |
14″ |
14-1/2″ |
| 458 |
14-1/2″ |
15″ |
| 459 |
15″ |
15-1/2″ |
| 460 |
15-1/2″ |
16″ |
| 461 |
16″ |
16-1/2″ |
| 462 |
16-1/2″ |
17″ |
| 463 |
17″ |
17-1/2″ |
| 464 |
17-1/2″ |
18″ |
| 465 |
18″ |
18-1/2″ |
| 466 |
18-1/2″ |
19″ |
| 467 |
19″ |
19-1/2″ |
| 468 |
19-1/2″ |
20″ |
| 469 |
20″ |
20-1/2″ |
| 470 |
21″ |
21-1/2″ |
| 471 |
22″ |
22-1/2″ |
| 472 |
23″ |
23-1/2″ |
| 473 |
24″ |
24-1/2″ |
| 474 |
25″ |
25-1/2″ |
| 475 |
26″ |
26-1/2″ |