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Inch Thread Gage Pitch Diameters
(Sizes 9/16" Through 15/16")
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Thread Size
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Plug Gage
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Ring Gage
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9/16-12 UNC
|
.5084"
|
.5152"
|
.5135"
|
.5068"
|
.5016"
|
.5084"
|
.5045"
|
|
9/16-16 UN
|
.5219"
|
.5280"
|
.5265"
|
.5205"
|
.5158"
|
.5219"
|
.5184"
|
|
9/16-18 UNF
|
.5264"
|
.5323"
|
.5308"
|
.5250"
|
.5205"
|
.5264"
|
.5230"
|
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9/16-20 UN
|
.5300"
|
.5355"
|
.5341"
|
.5287"
|
.5245"
|
.5300"
|
.5268"
|
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9/16-24 UNEF
|
.5354"
|
.5405"
|
.5392"
|
.5342"
|
.5303"
|
.5354"
|
.5325"
|
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9/16-28 UN
|
.5393"
|
.5441"
|
.5429"
|
.5382"
|
.5345"
|
.5393"
|
.5365"
|
|
9/16-32 UN
|
.5422"
|
.5467"
|
.5456"
|
.5412"
|
.5377"
|
.5422"
|
.5396"
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5/8-11 UNC
|
.5660"
|
.5732"
|
.5714"
|
.5644"
|
.5589"
|
.5660"
|
.5619"
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5/8-12 UN
|
.5709"
|
.5780"
|
.5762"
|
.5693"
|
.5639"
|
.5709"
|
.5668"
|
|
5/8-16 UN
|
.5844"
|
.5906"
|
.5890"
|
.5830"
|
.5782"
|
.5844"
|
.5808"
|
|
5/8-18 UNF
|
.5889"
|
.5949"
|
.5934"
|
.5875"
|
.5828"
|
.5889"
|
.5854"
|
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5/8-20 UN
|
.5925"
|
.5981"
|
.5967"
|
.5912"
|
.5869"
|
.5925"
|
.5893"
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5/8-24 UNEF
|
.5979"
|
.6031"
|
.6018"
|
.5967"
|
.5927"
|
.5979"
|
.5949"
|
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5/8-28 UN
|
.6018"
|
.6067"
|
.6055"
|
.6007"
|
.5969"
|
.6018"
|
.5990"
|
|
5/8-32 UN
|
.6047"
|
.6093"
|
.6082"
|
.6036"
|
.6000"
|
.6047"
|
.6020"
|
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11/16-12 UN
|
.6334"
|
.6405"
|
.6387"
|
.6318"
|
.6264"
|
.6334"
|
.6293"
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11/16-16 UN
|
.6469"
|
.6531"
|
.6515"
|
.6455"
|
.6407"
|
.6469"
|
.6433"
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11/16-20 UN
|
.6550"
|
.6606"
|
.6592"
|
.6537"
|
.6494"
|
.6550"
|
.6518"
|
|
11/16-24 UNEF
|
.6604"
|
.6656"
|
.6643"
|
.6592"
|
.6552"
|
.6604"
|
.6574"
|
|
11/16-28 UN
|
.6643"
|
.6692"
|
.6680"
|
.6632"
|
.6594"
|
.6643"
|
.6615"
|
|
11/16-32 UN
|
.6672"
|
.6718"
|
.6707"
|
.6661"
|
.6625"
|
.6672"
|
.6645"
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|
3/4-10 UNC
|
.6850"
|
.6927"
|
.6907"
|
.6832"
|
.6773"
|
.6850"
|
.6806"
|
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3/4-12 UN
|
.6959"
|
.7031"
|
.7013"
|
.6942"
|
.6887"
|
.6959"
|
.6918"
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3/4-16 UNF
|
.7094"
|
.7159"
|
.7143"
|
.7079"
|
.7029"
|
.7094"
|
.7056"
|
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3/4-20 UNEF
|
.7175"
|
.7232"
|
.7218"
|
.7162"
|
.7118"
|
.7175"
|
.7142"
|
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3/4-28 UN
|
.7268"
|
.7318"
|
.7305"
|
.7256"
|
.7218"
|
.7268"
|
.7239"
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3/4-32 UN
|
.7297"
|
.7344"
|
.7333"
|
.7286"
|
.7250"
|
.7297"
|
.7270"
|
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13/16-12 UN
|
.7584"
|
.7656"
|
.7638"
|
.7567"
|
.7512"
|
.7584"
|
.7543"
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13/16-16 UN
|
.7719"
|
.7782"
|
.7766"
|
.7704"
|
.7655"
|
.7719"
|
.7683"
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13/16-20 UNEF
|
.7800"
|
.7857"
|
.7843"
|
.7787"
|
.7743"
|
.7800"
|
.7767"
|
|
13/16-28 UN
|
.7893"
|
.7943"
|
.7930"
|
.7881"
|
.7843"
|
.7893"
|
.7864"
|
|
13/16-32 UN
|
.7922"
|
.7969"
|
.7958"
|
.7911"
|
.7875"
|
.7922"
|
.7895"
|
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7/8-9 UNC
|
.8028"
|
.8110"
|
.8089"
|
.8009"
|
.7946"
|
.8028"
|
.7981"
|
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7/8-12 UN
|
.8209"
|
.8281"
|
.8263"
|
.8192"
|
.8137"
|
.8209"
|
.8168"
|
|
7/8-14 UNF
|
.8286"
|
.8110"
|
.8339"
|
.8270"
|
.8216"
|
.8286"
|
.8245"
|
|
7/8-16 UN
|
.8344"
|
.8407"
|
.8391"
|
.8329"
|
.8280"
|
.8344"
|
.8308"
|
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7/8-20 UNEF
|
.8425"
|
.8482"
|
.8468"
|
.8412"
|
.8368"
|
.8425"
|
.8392"
|
|
7/8-28 UN
|
.8518"
|
.8568"
|
.8555"
|
.8506"
|
.8468"
|
.8518"
|
.8489"
|
|
7/8-32 UN
|
.8547"
|
.8594"
|
.8583"
|
.8536"
|
.8500"
|
.8547"
|
.8520"
|
|
15/16-12 UN
|
.8834"
|
.8908"
|
.8889"
|
.8817"
|
.8760"
|
.8834"
|
.8792"
|
|
15/16-16 UN
|
.8969"
|
.9034"
|
.9018"
|
.8954"
|
.8904"
|
.8969"
|
.8932"
|
|
15/16-20 UNEF
|
.9050"
|
.9109"
|
.9094"
|
.9036"
|
.8991"
|
.9050"
|
.9016"
|
|
15/16-28 UN
|
.9143"
|
.9195"
|
.9182"
|
.9131"
|
.9091"
|
.9143"
|
.9113"
|
|
15/16-32 UN
|
.9172"
|
.9221"
|
.9209"
|
.9161"
|
.9123"
|
.9172"
|
.9144"
|
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© 2007 Great Lakes Gage Sales, Inc.
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