Rosca Americana Unificada

  • ANSI B 1.1 Rosca Americana Unificada
  • Tolerância para Roscas Externa
D Série Tol. Área (mm²) Diâmetro D Série Tol. Área (mm²) Diâmetro
Maior Primitivo Maior Primitivo
Min: Max: Min: Max: Min: Max: Min: Max:
1/4" 20-UNC 2A 0,00318 6,116 6,322 5,403 5,497 1.1/8" 12-UNF 2A 0,856 26,240 28,529 27,003 27,155
1/4" 20-UNC 3A 0,0318 6,144 6,350 5,453 5,525 1.1/8" 12-UNF 3A 0,856 28,285 28,575 27,087 27,407
1/4" 28-UNF 2A 0,0364 6,160 6,325 5,652 5,735 1.1/4" 7-UNC 2A 0,969 31,278 31,694 29,149 29,337
1/4" 28-UNF 3A 0,0364 6,185 6,350 5,697 5,761 1.1/4" 7-UNC 3A 0,969 31,333 31,750 29,255 29,393
5/16" 18-UNC 2A 0,0524 7,686 7,907 6,888 6,990 1.1/4" 8-UN 2A 1,000 31,316 31,697 29,456 29,634
5/16" 18-UNC 3A 0,0524 7,717 7,938 6,944 7,021 1.1/4" 8-UN 3A 1,000 31,369 31,750 29,553 29,688
5/16" 24-UNF 2A 0,0580 7,727 7,910 7,127 7,221 1.1/4" 12-UNF 2A 1,073 31,415 31,704 30,1736 30,330
5/16" 24-UNF 3A 0,0580 7,755 7,938 7,181 7,249 1.1/4" 12-UNF 3A 1,073 31,460 31,750 30,259 30,376
3/8" 16-UNC 2A 0,0775 9,253 9,492 8,349 8,407 1.3/8" 6-UNC 2A 1,155 34,402 34,864 31,910 32,113
3/8" 16-UNC 3A 0,0775 9,286 3,525 8,410 8,494 1.3/8" 6-UNC 3A 1,155 34,463 34,925 32,022 32,174
3/8" 24-UNF 2A 0,0878 9,314 9,497 8,712 8,809 1.3/8" 8-UN 2A 1,233 34,488 34,869 32,624 32,807
3/8" 24-UNF 3A 0,0878 9,342 9,525 8,763 8,837 1.3/8" 8-UN 3A 1,233 34,544 34,925 32,725 32,863
7/16" 14-UNC 2A 0,1063 10,815 11,077 9,779 9,989 1.3/8" 12-UNF 2A 1,315 34,587 34,877 33,343 33,503
7/16" 14-UNC 3A 0,1063 10,851 11,113 9,845 9,934 1.3/8" 12-UNF 3A 1,315 34,635 34,925 33,431 33,551
7/16" 20-UNF 2A 0,1187 10,874 11,079 10,147 10,254 1.1/2" 6-UNC 2A 1,405 37,577 38,039 35,082 35,288
7/16" 20-UNF 3A 0,1187 10,907 11,113 10,208 10,287 1.1/2" 6-UNC 3A 1,405 37,638 38,100 35,194 35,349
1/2" 13-UNC 2A 0,1419 12,385 12,662 11,265 11,392 1.1/2" 8-UN 2A 1,492 37,663 38,044 35,796 35,982
1/2" 13-UNC 3A 0,1419 12,423 12,700 11,336 11,430 1.1/2" 8-UN 3A 1,492 37,719 38,100 35,898 36,038
1/2" 20-UNF 2A 0,1599 12,461 12,667 11,732 11,841 1.1/2" 12-UNF 2A 1,581 37,762 38,052 36,515 36,678
1/2" 20-UNF 3A 0,1599 12,494 12,700 11,793 11,875 1.1/2" 12-UNF 3A 1,581 37,810 38,100 36,604 36,726
9/16" 12-UNC 2A 0,182 13,957 13,993 12,741 12,873 1.5/8" 6-UNC 2A 1,680 40,749 41,212 38,252 38,461
9/16" 12-UNC 3A 0,182 13,998 14,228 12,814 12,906 1.5/8" 6-UNC 3A 1,680 40,813 41,275 38,367 38,525
9/16" 18-UNF 2A 0,203 14,031 14,252 13,221 13,335 1.5/8" 8-UN 2A 1,775 40,838 41,219 38,969 39,157
9/16" 18-UNF 3A 0,203 14,067 14,288 13,284 13,371 1.5/8" 8-UN 3A 1,775 40,894 41,275 39,070 39,213
5/8" 11-UNC 2A 0,226 15,527 15,834 14,196 14,336 1.5/8" 12-UNF 2A 1,872 40,940 41,229 39,705 39,855
5/8" 11-UNC 3A 0,226 15,568 15,875 14,272 14,923 1.5/8" 12-UNF 3A 1,872 40,895 41,275 39,789 39,901
5/8" 18-UNF 2A 0,256 15,618 15,839 14,803 14,923 1.3/4" 5-UNC 2A 1,900 43,861 44,381 40,856 41,082
5/8" 18-UNF 3A 0,256 15,654 15,875 14,869 14,958 1.3/4" 5-UNC 3A 1,900 43,929 44,450 40,980 41,151
3/4" 10-UNC 2A 0,334 18,677 19,004 17,203 17,353 1.3/4" 8-UN 2A 2,080 44,011 44,392 42,319 42,392
3/4" 10-UNC 3A 0,334 18,722 19,050 17,287 17,399 1.3/4" 8-UN 3A 2,080 44,069 44,450 42,245 42,388
3/4" 16-UNF 2A 0,373 18,773 19,012 17,854 17,981 1.3/4" 12-UN 2A 2,187 44,115 44,404 42,878 43,030
3/4" 16-UNF 3A 0,373 18,811 19,050 19,922 18,019 1.3/4" 12-UN 3A 2,187 44,160 44,450 42,962 43,076
7/8" 9-UNC 2A 0,462 21,824 22,177 20,183 20,343 1.7/8" 6-UNC 2A 2,304 47,099 47,562 44,597 44,811
7/8" 9-UNC 3A 0,462 21,872 22,225 20,272 20,391 1.7/8" 6-UNC 3A 2,304 47,163 47,625 44,715 44,874
7/8" 14-UNF 2A 0,509 21,923 22,184 20,869 21,006 1.7/8" 8-UN 2A 2,414 47,186 47,567 45,309 45,504
7/8" 14-UNF 3A 0,509 21,963 22,225 20,942 21,046 1.7/8" 8-UN 3A 2,414 47,186 47,567 45,309 45,504
1" 8-UNC 2A 0,606 24,968 25,349 23,114 23,287 1.7/8" 12-UNF 2A 2,527 47,290 47,579 46,053 46,205
1" 8-UNC 3A 0,606 25,019 25,400 23,208 23,338 1.7/8" 12-UNF 3A 2,527 47,335 47,625 46,137 46,251
1" 12-UNF 2A 0,663 25,065 25,354 23,830 23,980 2" 4,5-UNC 2A 2,500 50,168 50,726 46,820 47,061
1" 12-UNF 3A 0,663 25,110 25,400 23,914 24,026 2" 4,5-UNC 3A 2,500 50,241 50,800 46,954 47,135
1.1/8" 7-UNC 2A 0,763 28,103 28,519 25,979 26,162 2" 8-UN 2A 2,770 50,361 50,742 48,481 48,679
1.1/8" 7-UNC 3A 0,763 28,158 28,575 26,081 26,218 2" 8-UN 3A 2,770 50,419 50,800 48,590 18,738
1.1/8" 8-UN 2A 0,790 28,141 28,522 26,284 26,459 2" 12-UNF 2A 2,890 50,465 50,754 49,225 49,380
1.1/8" 8-UN 3A 0,790 28,194 28,575 26,380 26,513 2" 12-UNF 3A 2,890 50,510 49,312 49,312 49,426
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