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Phone: 203-753-5121
Fax: 203-755-9011
Toll-free: 800-992-3233

Email us:
sales@danco-inc.com


Hours: 8am-5pm est
Mon-Fri
Standard Pitch diameters for Unified Inch Thread Plug Gages
NOMINAL SIZE1B or 2B or 3B GO2B NOGO3B NOGO
# 0-80 UNF.0519.0542.0536
# 1-64 UNC.0629.0655.0648
# 1-72 UNF.0640.0665.0659
# 2-56 UNC.0744.0772.0765
# 2-64 UNF.0759.0786.0779
# 3-48 UNC.0855.0885.0877
# 3-56 UNF.0874.0902.0895
# 4-40 UNC.0958.0991.0982
# 4-48 UNF.0985.1016.1008
# 5-40 UNC.1088.1121.1113
# 5-44 UNF.1102.1134.1126
# 6-32 UNC.1177.1214.1204
# 6-40 UNF.1218.1252.1243
# 8-32 UNC.1437.1475.1465
# 8-36 UNF.1460.1496.1487
# 10-24 UNC.1629.1672.1661
# 10-32 UNF.1697.1736.1726
# 12-24 UNC.1889.1933.1922
# 12-28 UNF.1928.1970.1959
# 12-32 UNEF.1957.1998.1988
1/4"-20 UNC.2175.2224.2211
1/4"-28 UNF.2268.2311.2300
1/4"-32 UNEF.2297.2339.2328
5/16"-18 UNC.2764.2817.2803
5/16"-24 UNF.2854.2902.2890
5/16"-32 UNEF.2922.2964.2953
3/8"-16 UNC.3344.3401.3387
3/8"-24 UNF.3479.3528.3516
3/8"-32 UNEF.3547.3591.3580
7/16"-14 UNC.3911.3972.3957
7/16"-20 UNF.4050.4104.4091
7/16"-28 UNEF.4143.4189.4178
1/2"-13 UNC.4500.4565.4548
1/2"-20 UNF.4675.4731.4717
1/2"-28 UNEF.4768.4816.4804
9/16"-12 UNC.5084.5152.5135
9/16"-18 UNF.5264.5323.5308
9/16"-24 UNEF.5354.5405.5392
5/8"-11 UNC.5660.5732.5714
5/8"-18 UNF.5889.5949.5934
5/8"-24 UNEF.5979.6031.6018
11/16"-24 UNEF.6604.6656.6643
3/4"-10 UNC.6850.6927.6907
3/4"-16 UNF.7094.7159.7143
3/4"-20 UNEF.7175.7232.7218
13/16"-20 UNEF.7800.7857.7843
7/8"-9 UNC.8028.8110.8089
7/8"-14 UNF.8286.8356.8339
7/8"-20 UNEF.8425.8482.8468
15/16"-20 UNEF.9050.9109.9094
1"-8 UNC.9188.9276.9254
1"-12 UNF.9459.9535.9516
1"-14 UNS.9536.9609.9590
1"-20 UNEF.9675.9734.9719
1-1/16"-12 UN1.00841.01581.0139
1-1/16"-18 UNEF1.02641.03261.0310
1-1/8"-7 UNC1.03221.04161.0393
1-1/8"-12 UNF1.07091.07871.0768
1-1/8"-18 UNEF1.08891.09511.0935
1-3/16"-12 UN1.13341.14091.1390
1-3/16"-18 UNEF1.15141.15771.1561
1-1/4"-7 UNC1.15721.16681.1644
1-1/4"-12 UNF1.19591.20391.2019
1-1/4"-18 UNEF1.21391.22021.2186
1-5/16"-12 UN1.25841.26591.2640
1-5/16"-18 UNEF1.27641.28271.2811
1-3/8"-6 UNC1.26671.27711.2745
1-3/8"-12 UNF1.32091.32911.3270
1-3/8"-18 UNEF1.33891.34521.3436
1-7/16"-12 UN1.38341.39101.3891
1-7/16"-18 UNEF1.40141.40791.4062
1-1/2"-6 UNC1.39171.40221.3996
1-1/2"-12 UNF1.44591.45421.4522
1-1/2"-18 UNEF1.46391.47041.4687