公制、美制螺纹标准数据库-UNS
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Inch
mm
Inch
mm
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3310–28 UNS 2A 0.00100.02540.1890 4.80060.1825 4.6355——0.1658 4.21130.1625 4.12750.1464 3.71862B 0.1510 3.83540.1600 4.06400.1668 4.23670.1711 4.34590.1900 4.82603610–36 UNS 2A 0.00090.02290.1891 4.80310.1836 4.6634——0.1711 4.34590.1681 4.26970.1560 3.96242B 0.1600 4.06400.1660 4.21640.1720 4.36880.1759 4.46790.1900 4.82603710–40 UNS 2A 0.00090.02290.1891 4.80310.1840 4.6736——0.1729 4.39170.1700 4.31800.1592 4.04372B 0.1630 4.14020.1690 4.29260.1738 4.41450.1775 4.50850.1900 4.82603810–48 UNS 2A 0.00080.02030.1892 4.80570.1847 4.6914——0.1757 4.46280.1731 4.39670.1644 4.17582B 0.1670 4.24180.1720 4.36880.1765 4.48310.1799 4.56950.1900 4.826039
10–56 UNS
2A
0.0007
0.0178
0.1893
4.8082
0.1852
4.7041
—
—
0.1777
4.5136
0.1752
4.4501
0.1681
4.2697
2B
0.1710
4.3434
0.1750
4.4450
0.1784
4.5314
0.1816
4.6126
0.1900
4.8260
No.
Max
Minor Diameter
Min
Max
Pitch Diameter Major Diameter Min
Min e
Major Diameter
UNR Minor Dia.,c Max (Ref.)
Max d
Min
Min
Pitch Diameter
Nominal Size,Threads per
Inch,and Series Designation a
Class
Class
Max d
Min
Allowance
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
Inch
mm
No.
Standard Series and Selected Combinations- Unified Screw Threads
Max
Minor Diameter
Min
Max
Pitch Diameter Major Diameter Min
Min
e
Major Diameter
UNR Minor Dia.,c Max (Ref.)
Max
d
Min
Min
Pitch Diameter
Nominal Size,Threads per
Inch,and Series Designation a
Class
Class
Max
d
Min
Allowance
Internal b
External b
4612–36 UNS 2A 0.00090.02290.2151 5.46350.2096 5.3238——0.1971 5.00630.1941 4.93010.1821 4.62532B 0.1860 4.72440.1920 4.87680.1980 5.02920.2019 5.12830.2160 5.48644712–40 UNS 2A 0.00090.02290.2151 5.46350.2100 5.3340——0.1989 5.05210.1960 4.97840.1835 4.66092B 0.1890 4.80060.1950 4.95300.1998 5.07490.2035 5.16890.2160 5.48644812–48 UNS 2A 0.00080.02030.2152 5.46610.2107 5.3518——0.2017 5.12320.1991 5.05710.1904 4.83622B 0.1930 4.90220.1980 5.02920.2025 5.14350.2059 5.22990.2160 5.48644912–56 UNS 2A 0.00070.01780.2153 5.46860.2112 5.3645——0.2037 5.17400.2012 5.11050.1941 4.93012B 0.1970 5.00380.2010 5.10540.2044 5.19180.2076 5.27300.2160 5.4864531⁄4–24 UNS 2A 0.00110.02790.2489 6.32210.2417 6.1392——0.2218 5.63370.2181 5.53970.1993 5.06222B 0.2050 5.20700.2150 5.46100.2229 5.66170.2277 5.78360.2500 6.3500541⁄4–27 UNS 2A 0.00100.02540.2490 6.32460.2423 6.1544——0.2249 5.71250.2214 5.62360.2049 5.20452B 0.2100 5.33400.2190 5.56260.2259 5.73790.2304 5.85220.2500 6.3500601⁄4–36 UNS 2A 0.00090.02290.2491 6.32710.2436 6.1874——0.2311 5.86990.2280 5.79120.2161 5.48892B 0.2200 5.58800.2260 5.74040.2320 5.89280.2360 5.99440.2500 6.3500611⁄4–40 UNS 2A 0.00090.02290.2491 6.32710.2440 6.1976——0.2329 5.91570.2300 5.84200.2193 5.57022B 0.2230 5.66420.2290 5.81660.2338 5.93850.2376 6.03500.2500 6.3500621⁄4–48 UNS 2A 0.00080.02030.2492 6.32970.2447 6.2154——0.2357 5.98680.2330 5.91820.2243 5.69722B 0.2270 5.76580.2320 5.89280.2365 6.00710.2401 6.09850.2500 6.3500631⁄4–56 UNS 2A 0.00080.02030.2492 6.32970.2451 6.2255——0.2376 6.03500.2350 5.96900.2280 5.79122B 0.2310 5.86740.2350 5.96900.2384 6.05540.2417 6.13920.2500 6.3500725⁄16–27 UNS 2A 0.00100.02540.31157.91210.30487.7419——0.28747.30000.28397.21110.2674 6.79202B 0.2720 6.90880.28107.13740.28847.32540.29297.43970.31257.9375775⁄16–36 UNS 2A 0.00090.02290.31167.91460.30617.7749——0.29367.45740.29057.37870.27857.07392B 0.28207.16280.28907.34060.29457.48030.29857.58190.31257.9375785⁄16–40 UNS 2A 0.00090.02290.31167.91460.30657.7851——0.29547.50320.29257.42950.28187.15772B 0.28507.23900.29107.39140.29637.52600.30017.62250.31257.9375795⁄16–48 UNS 2A 0.00080.02030.31177.91720.30727.8029——0.29827.57430.29557.50570.28697.28732B 0.29007.36600.29507.49300.29907.59460.30267.68600.31257.937583
3⁄8–18 UNS
2A
0.0013
0.0330
0.3737
9.4920
0.3650
9.2710
—
—
0.3376
8.5750
0.3333
8.4658
0.3076
7.8130
2B
0.3150
8.0010
0.3280
8.3312
0.3389
8.6081
0.3445
8.7503
0.3750
9.5250