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 |
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Inch Thread Gage Pitch Diameters
(Sizes #0 Through 1/2")
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|
Thread Size
|
Plug Gage
|
Ring Gage
|
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|
|
|
|
|
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|
#0-80 UNF
|
.0519"
|
.0542"
|
.0536"
|
.0514"
|
.0496"
|
.0519"
|
.0506"
|
|
#1-64 UNC
|
.0629"
|
.0655"
|
.0648"
|
.0623"
|
.0603"
|
.0629"
|
.0614"
|
|
#1-72 UNF
|
.0640"
|
.0665"
|
.0659"
|
.0634"
|
.0615"
|
.0640"
|
.0626"
|
|
#2-56 UNC
|
.0744"
|
.0772"
|
.0765"
|
.0738"
|
.0717"
|
.0744"
|
.0728"
|
|
#2-64 UNF
|
.0759"
|
.0786"
|
.0779"
|
.0753"
|
.0733"
|
.0759"
|
.0744"
|
|
#3-48 UNC
|
.0855"
|
.0885"
|
.0877"
|
.0848"
|
.0825"
|
.0855"
|
.0838"
|
|
#3-56 UNF
|
.0874"
|
.0902"
|
.0895"
|
.0867"
|
.0845"
|
.0874"
|
.0858"
|
|
#4-40 UNC
|
.0958"
|
.0991"
|
.0982"
|
.0950"
|
.0925"
|
.0958"
|
.0939"
|
|
#4-48 UNF
|
.0985"
|
.1016"
|
.1008"
|
.0978"
|
.0954"
|
.0985"
|
.0967"
|
|
#5-40 UNC
|
.1088"
|
.1121"
|
.1113"
|
.1080"
|
.1054"
|
.1088"
|
.1069"
|
|
#5-44 UNF
|
.1102"
|
.1134"
|
.1126"
|
.1095"
|
.1070"
|
.1102"
|
.1083"
|
|
#6-32 UNC
|
.1177"
|
.1214"
|
.1204"
|
.1169"
|
.1141"
|
.1177"
|
.1156"
|
|
#6-40 UNF
|
.1218"
|
.1252"
|
.1243"
|
.1210"
|
.1184"
|
.1218"
|
.1198"
|
|
#8-32 UNC
|
.1437"
|
.1475"
|
.1465"
|
.1428"
|
.1399"
|
.1437"
|
.1415"
|
|
#8-36 UNF
|
.1460"
|
.1496"
|
.1487"
|
.1452"
|
.1424"
|
.1460"
|
.1439"
|
|
#10-24 UNC
|
.1629"
|
.1672"
|
.1661"
|
.1619"
|
.1586"
|
.1629"
|
.1604"
|
|
#10-32 UNF
|
.1697"
|
.1736"
|
.1726"
|
.1688"
|
.1658"
|
.1697"
|
.1674"
|
|
#12-24 UNC
|
.1889"
|
.1933"
|
.1922"
|
.1879"
|
.1845"
|
.1889"
|
.1863"
|
|
#12-28 UNF
|
.1928"
|
.1970"
|
.1959"
|
.1918"
|
.1886"
|
.1928"
|
.1904"
|
|
#12-32 UNEF
|
.1957"
|
.1998"
|
.1988"
|
.1948"
|
.1917"
|
.1957"
|
.1933"
|
|
1/4-20 UNC
|
.2175"
|
.2224"
|
.2211"
|
.2164"
|
.2127"
|
.2175"
|
.2147"
|
|
1/4-28 UNF
|
.2268"
|
.2311"
|
.2300"
|
.2258"
|
.2225"
|
.2268"
|
.2243"
|
|
1/4-32 UNEF
|
.2297"
|
.2339"
|
.2328"
|
.2287"
|
.2255"
|
.2297"
|
.2273"
|
|
5/16-18 UNC
|
.2764"
|
.2817"
|
.2803"
|
.2752"
|
.2712"
|
.2764"
|
.2734"
|
|
5/16-20 UN
|
.2800"
|
.2852"
|
.2839"
|
.2788"
|
.2748"
|
.2800"
|
.2770"
|
|
5/16-24 UNF
|
.2854"
|
.2902"
|
.2890"
|
.2843"
|
.2806"
|
.2854"
|
.2827"
|
|
5/16-28 UN
|
.2893"
|
.2937"
|
.2926"
|
.2883"
|
.2849"
|
.2893"
|
.2867"
|
|
5/16-32 UNEF
|
.2922"
|
.2964"
|
.2953"
|
.2912"
|
.2880"
|
.2922"
|
.2898"
|
|
3/8-16 UNC
|
.3344"
|
.3401"
|
.3387"
|
.3331"
|
.3287"
|
.3344"
|
.3311"
|
|
3/8-20 UN
|
.3425"
|
.3479"
|
.3465"
|
.3413"
|
.3372"
|
.3425"
|
.3394"
|
|
3/8-24 UNF
|
.3479"
|
.3528"
|
.3516"
|
.3468"
|
.3430"
|
.3479"
|
.3450"
|
|
3/8-28 UN
|
.3518"
|
.3564"
|
.3553"
|
.3507"
|
.3471"
|
.3518"
|
.3491"
|
|
3/8-32 UNEF
|
.3547"
|
.3591"
|
.3580"
|
.3537"
|
.3503"
|
.3547"
|
.3522"
|
|
7/16-14 UNC
|
.3911"
|
.3972"
|
.3957"
|
.3897"
|
.3850"
|
.3911"
|
.3876"
|
|
7/16-16 UN
|
.3969"
|
.4028"
|
.4014"
|
.3955"
|
.3909"
|
.3969"
|
.3935"
|
|
7/16-20 UNF
|
.4050"
|
.4104"
|
.4091"
|
.4037"
|
.3995"
|
.4050"
|
.4019"
|
|
7/16-24 UN
|
.4104"
|
.4153"
|
.4141"
|
.4093"
|
.4055"
|
.4104"
|
.4075"
|
|
7/16-28 UNEF
|
.4143"
|
.4189"
|
.4178"
|
.4132"
|
.4096"
|
.4143"
|
.4116"
|
|
7/16-32 UN
|
.4172"
|
.4216"
|
.4205"
|
.4162"
|
.4128"
|
.4172"
|
.4147"
|
|
1/2-13 UNC
|
.4500"
|
.4565"
|
.4548"
|
.4485"
|
.4435"
|
.4500"
|
.4463"
|
|
1/2-16 UN
|
.4594"
|
.4655"
|
.4640"
|
.4580"
|
.4533"
|
.4594"
|
.4559"
|
|
1/2-20 UNF
|
.4675"
|
.4731"
|
.4717"
|
.4662"
|
.4619"
|
.4675"
|
.4643"
|
|
1/2-28 UNEF
|
.4768"
|
.4816"
|
.4804"
|
.4757"
|
.4720"
|
.4768"
|
.4740"
|
|
1/2-32 UN
|
.4797"
|
.4842"
|
.4831"
|
.4787"
|
.4752"
|
.4797"
|
.4771"
|
|
|
© 2007 Great Lakes Gage Sales, Inc.
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