ACME - FMS

1 2007/1 Page 1 - 2 acme SCREW THREADS NOMINAL PITCH DIAMETER d2 & D2 d2/D2 = d/D PDn (PDn = ) EXTERNAL THREAD d = Major diameter d2 = Pitch diameter d1 = Minor diameter INTERNAL THREAD D = Major diameter D2 = Pitch diameter D1 = Minor diameter P = Pitch = Flank angle 29O Ref.: ASME/ANSI acme SCREW THREADS This standard has much more information than given here. GENERAL PURPOSE SINGLE START acme SCREW THREADS, STANDARD SERIES NOMINAL DIAMETERS & PITCH DIAMETERS Denomination (inches) Nominal diameter mm Pitch P (mm) Nominal pitch diameter mm 5/16 3/8 7/16 5/8 7/8 1 1 1/8 1 1 3/8 1 1 2 2 2 2 3 3 4 4 5 0,2500 0,3125 0,3750 0,4375 0,5000 0,6250 0,7500 0,8750 1,0000 1,1250 1,2500 1,3750 1,5000 1,7500 2,0000 2,2500 2,5000 2,7500 3,0000 3,5000 4,0000 4,5000 5,0000 6,350 7,937 9,525 11,112 12,700 15,875 19,050 22,225 25,400 28,575 31,750 34,925 38,100 44,450 50,800 57,150 63,500 69,850 76,200 88,900 101,600 114,300 127,000 16 14 12 12 10 8 6 6 5 5 5 4 4 4 4 3 3 3 2 2 2 2 2 1,587 1,814 2,117 2,117 2,540 3,175 4,233 4,233 5,080 5,080 5,080 6,350 6,350 6,350 6,350 8,467 8.

2 467 8,467 12,700 12,700 12,700 12,700 12,700 5,558 7,031 8,466 10,053 11,430 14,287 16,934 20,109 22,860 26,035 29,210 31,750 34,925 41,275 47,625 52,916 59,266 65,616 69,850 82,550 95,250 107,950 120,650 Nominal diameter (mm) & Nominal Pitch diameter (mm)are for tolerance classes 2G, 3G and 4G 2007/1 Page 2 - 2 Pitch diameter tolerances for external threads (d2) classes 2G, 3G and 4G Denomination (inches) 2G 3G 4G max min tol. max min tol. max min tol. 5/16 3/8 7/16 5/8 7/8 1 1 1/8 1 1 3/8 1 1 2 2 2 2 3 3 4 4 5 0,2500 0,3125 0,3750 0,4375 0,5000 0,6250 0,7500 0,8750 1,0000 1,1250 1,2500 1,3750 1,5000 1,7500 2,0000 2,2500 2,5000 2,7500 3,0000 3,5000 4,0000 4,5000 5,0000 16 14 12 12 10 8 6 6 5 5 5 4 4 4 4 3 3 3 2 2 2 2 2 5,456 6,929 8,341 9,929 11,285 14,127 16,759 19,919 22,657 25,819 28,984 31,511 34,676 41,008 47,338 52,611 58,946 65,278 69,494 82,169 94,844 107,518 120,190 5,189 6,640 8,029 9,609 10,937 13,736 16,317 19,464 22,164 25,316 28,473 30,958 34,110 40,427 46,741 51,943 58,265 64,585 68,692 81.

3 346 94,000 106,657 119,311 0,267 0,290 0,312 0,320 0,348 0,391 0,442 0,455 0,493 0,503 0,511 0,559 0,566 0,582 0,597 0,668 0,681 0,693 0,803 0,823 0,843 0,861 0,879 5,481 6,955 8,372 9,959 11,323 14,168 16,802 19,967 22,708 25,872 29,040 31,572 34,740 41,074 47,409 52,687 59,025 65,364 69,583 82,266 94,945 107,627 120,305 5,357 6,820 8,225 9,809 11,161 13,985 16,596 19,756 22,476 25,639 28,801 31,311 34,475 40,803 47,130 52,375 58,707 65,042 69,210 81,882 94,552 107,226 119,893 0,124 0,135 0,147 0,150 0,163 0,183 0,206 0,211 0,231 0,234 0,239 0,262 0,264 0,272 0,279 0,312 0,317 0,323 0,373 0,384 0,394 0,401 0,411 5,507 6,980 8,405 9,992 11,359 14,206 16,845 20,015 22,758 25,928 29,096 31,631 34,801 41,143 47,480 52,763 59,106 65,448 69,672 82,360 95,047 107,734 120,419 5,418 6,883 8,301 9,886 11,242 14,077 16,698 19,863 22,593 25,761 28,926 31,445 34,613 40,950 47,282 52,540 58,880 65,217 69,405 82,085 94,765 107,447 120,127 0,089 0,097 0,104 0,107 0,117 0,130 0,147 0,152 0,165 0,168 0,170 0,185 0,188 0,193 0,198 0,224 0,226 0,231 0,267 0,274 0,282 0,287 0,292 All dimensions in these columns are in mm Pitch diameter tolerances for internal threads (D2)

4 Classes 2G, 3G and 4G Denomination (inches) 2G 3G 4G min max tol. min max tol. min max tol. 5/16 3/8 7/16 5/8 7/8 1 1 1/8 1 1 3/8 1 1 2 2 2 2 3 3 4 4 5 0,2500 0,3125 0,3750 0,4375 0,5000 0,6250 0,7500 0,8750 1,0000 1,1250 1,2500 1,3750 1,5000 1,7500 2,0000 2,2500 2,5000 2,7500 3,0000 3,5000 4,0000 4,5000 5,0000 16 14 12 12 10 8 6 6 5 5 5 4 4 4 4 3 3 3 2 2 2 2 2 5,558 7,031 8,466 10,053 11,430 14,287 16,934 20,109 22,860 26,035 29,210 31,750 34,925 41,275 47,625 52,916 59,266 65,616 69,850 82,550 95,250 107,950 120,650 5,824 7,320 8,778 10,373 11,778 14,679 17,376 20,564 23,353 26,538 29,721 32,309 35,491 41,857 48,222 53,384 59,947 66,309 70.

5 653 83,373 96,093 108,811 121,529 0,267 0,290 0,312 0,320 0,348 0,391 0,442 0,455 0,493 0,503 0,511 0,559 0,566 0,582 0,597 0,668 0,681 0,693 0,803 0,823 0,843 0,861 0,879 5,558 7,031 8,466 10,053 11,430 14,287 16,934 20,109 22,860 26,035 29,210 31,750 34,925 41,275 47,625 52,916 59,266 65,616 69,850 82,550 95,250 107,950 120,650 5,682 7,165 8,613 10,203 11,593 14,470 17,140 20,320 23,091 26,269 29,449 32,012 35,189 41,547 47,904 53,228 59,583 65,938 70,223 82,934 95,644 108,351 121,061 0,124 0,135 0,147 0,150 0,163 0,183 0,206 0,211 0,231 0,234 0,239 0,262 0,264 0,272 0,279 0,312 0,317 0,323 0,373 0,384 0,394 0,401 0,411 5,558 7,031 8,466 10,053 11,430 14,287 16,934 20,109 22,860 26,035 29,210 31,750 34,925 41,275 47,625 52,916 59,266 65,616 69,850 82,550 95,250 107,950 120,650 5,646 7,127 8,570 10,160 11,547 14,417 17,081 20,262 23,025 26,203 29,380 31,935 35,113 41,468 47,823 53,139 59,492 65,847 70,117 82,824 95,532 108,237 120,942 0,089 0,097 0,104 0,107 0,117 0,130 0,147 0,152 0,165 0,168 0,170 0,185 0,188 0,193 0,198 0,224 0,226 0,231 0,267 0,274 0,282 0,287 0.

6 292 All dimensions in these columns are in mm Examples Denomination Bolt Pitch diameter d2 max min 1,250-5- acme -3G 29,210 29,040 28,801 Denomination Nut Pitch diameter D2 max min 1,750-4- acme -2G 41,275 41,857 41,275