Inch Thread Gage Pitch Diameters

(Sizes 1 1/16" Through 1 1/2")

Typical thread class usage:

A class 1A external thread and a class 1B internal thread gives a loose fit.

A class 2A external thread and a class 2B internal thread gives a normal fit.

A class 3A external thread and a class 3B internal thread gives a close fit.

Classes 1A, 2A, and 3A gages are thread ring gages to check external threads.

Classes 1B, 2B, and 3B gages are thread plug gages to check internal threads.

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Fractional Thread Size
Decimal Thread Size
Go Pitch Diameter

(P.D.)

No Go Pitch Diameter

(P.D.)

1 1/16-8 UN-2A
1.0625-8 UN-2A
.9793"
.9725"
1 1/16-8 UN-2B
1.0625-8 UN-2B
.9813"
.9902"
1 1/16-8 UN-3A
1.0625-8 UN-3A
.9813"
.9762"
1 1/16-8 UN-3B
1.0625-8 UN-3B
.9813"
.9880"
1 1/16-12 UN-2A
1.0625-12 UN-2A
1.0067"
1.0010"
1 1/16-12 UN-2B
1.0625-12 UN-2B
1.0084"
1.0158"
1 1/16-12 UN-3A
1.0625-12 UN-3A
1.0084"
1.0042"
1 1/16-12 UN-3B
1.0625-12 UN-3B
1.0084"
1.0139"
1 1/16-16 UN-2A
1.0625-16 UN-2A
1.0204"
1.0154"
1 1/16-16 UN-2B
1.0625-16 UN-2B
1.0219"
1.0284"
1 1/16-16 UN-3A
1.0625-16 UN-3A
1.0219"
1.0182"
1 1/16-16 UN-3B
1.0625-16 UN-3B
1.0219"
1.0268"
1 1/16-18 UNEF-2A
1.0625-18 UNEF-2A
1.0250"
1.0203"
1 1/16-18 UNEF-2B
1.0625-18 UNEF-2B
1.0264"
1.0326"
1 1/16-18 UNEF-3A
1.0625-18 UNEF-3A
1.0264"
1.0228"
1 1/16-18 UNEF-3B
1.0625-18 UNEF-3B
1.0264"
1.0310"
1 1/16-20 UN-2A
1.0625-20 UN-2A
1.0286"
1.0241"
1 1/16-20 UN-2B
1.0625-20 UN-2B
1.0300"
1.0359"
1 1/16-20 UN-3A
1.0625-20 UN-3A
1.0300"
1.0266"
1 1/16-20 UN-3B
1.0625-20 UN-3B
1.0300"
1.0344"
1 1/16-28 UN-2A
1.0625-28 UN-2A
1.0381"
1.0341"
1 1/16-28 UN-2B
1.0625-28 UN-2B
1.0393"
1.0445"
1 1/16-28 UN-3A
1.0625-28 UN-3A
1.0393"
1.0363"
1 1/16-28 UN-3B
1.0625-28 UN-3B
1.0393"
1.0432"
1 1/8-7 UNC-1A
1.1250-7 UNC-1A
1.0300"
1.0191"
1 1/8-7 UNC-1B
1.1250-7 UNC-1B
1.0322"
1.0463"
1 1/8-7 UNC-2A
1.1250-7 UNC-2A
1.0300"
1.0228"
1 1/8-7 UNC-2B
1.1250-7 UNC-2B
1.0322"
1.0416"
1 1/8-7 UNC-3A
1.1250-7 UNC-3A
1.0322"
1.0268"
1 1/8-7 UNC-3B
1.1250-7 UNC-3B
1.0322"
1.0393"
1 1/8-8 UN-2A
1.1250-8 UN-2A
1.0417"
1.0348"
1 1/8-8 UN-2B
1.1250-8 UN-2B
1.0438"
1.0528"
1 1/8-8 UN-3A
1.1250-8 UN-3A
1.0438"
1.0386"
1 1/8-8 UN-3B
1.1250-8 UN-3B
1.0438"
1.0505"
1 1/8-10 UNS-2A
1.1250-10 UNS-2A
1.0582"
1.0520"
1 1/8-10 UNS-2B
1.1250-10 UNS-2B
1.0600"
1.0680"
1 1/8-12 UNF-1A
1.1250-12 UNF-1A
1.0691"
1.0601"
1 1/8-12 UNF-1B
1.1250-12 UNF-1B
1.0709"
1.0826"
1 1/8-12 UNF-2A
1.1250-12 UNF-2A
1.0691"
1.0631"
1 1/8-12 UNF-2B
1.1250-12 UNF-2B
1.0709"
1.0787"
1 1/8-12 UNF-3A
1.1250-12 UNF-3A
1.0709"
1.0664"
1 1/8-12 UNF-3B
1.1250-12 UNF-3B
1.0709"
1.0768"
1 1/8-14 UNS-2A
1.1250-14 UNS-2A
1.0770"
1.0717"
1 1/8-14 UNS-2B
1.1250-14 UNS-2B
1.0786"
1.0855"
1 1/8-16 UN-2A
1.1250-16 UN-2A
1.0829"
1.0779"
1 1/8-16 UN-2B
1.1250-16 UN-2B
1.0844"
1.0909"
1 1/8-16 UN-3A
1.1250-16 UN-3A
1.0844"
1.0807"
1 1/8-16 UN-3B
1.1250-16 UN-3B
1.0844"
1.0893"
1 1/8-18 UNEF-2A
1.1250-18 UNEF-2A
1.0875"
1.0828"
1 1/8-18 UNEF-2B
1.1250-18 UNEF-2B
1.0889"
1.0951"
1 1/8-18 UNEF-3A
1.1250-18 UNEF-3A
1.0889"
1.0853"
1 1/8-18 UNEF-3B
1.1250-18 UNEF-3B
1.0889"
1.0935"
1 1/8-20 UN-2A
1.1250-20 UN-2A
1.0911"
1.0866"
1 1/8-20 UN-2B
1.1250-20 UN-2B
1.0925"
1.0984"
1 1/8-20 UN-3A
1.1250-20 UN-3A
1.0925"
1.0891"
1 1/8-20 UN-3B
1.1250-20 UN-3B
1.0925"
1.0969"
1 1/8-24 UNS-2A
1.1250-24 UNS-2A
1.0966"
1.0924"
1 1/8-24 UNS-2B
1.1250-24 UNS-2B
1.0979"
1.1034"
1 1/8-28 UN-2A
1.1250-28 UN-2A
1.1006"
1.0966"
1 1/8-28 UN-2B
1.1250-28 UN-2B
1.1018"
1.1070"
1 1/8-28 UN-3A
1.1250-28 UN-3A
1.1018"
1.0988"
1 1/8-28 UN-3B
1.1250-28 UN-3B
1.1018"
1.1057"
1 3/16-8 UN-2A
1.1875-8 UN-2A
1.1042"
1.0972"
1 3/16-8 UN-2B
1.1875-8 UN-2B
1.1063"
1.1154"
1 3/16-8 UN-3A
1.1875-8 UN-3A
1.1063"
1.1011"
1 3/16-8 UN-3B
1.1875-8 UN-3B
1.1063"
1.1131"
1 3/16-12 UN-2A
1.1875-12 UN-2A
1.1317"
1.1259"
1 3/16-12 UN-2B
1.1875-12 UN-2B
1.1334"
1.1409"
1 3/16-12 UN-3A
1.1875-12 UN-3A
1.1334"
1.1291"
1 3/16-12 UN-3B
1.1875-12 UN-3B
1.1334"
1.1390"
1 3/16-16 UN-2A
1.1875-16 UN-2A
1.1454"
1.1403"
1 3/16-16 UN-2B
1.1875-16 UN-2B
1.1469"
1.1535"
1 3/16-16 UN-3A
1.1875-16 UN-3A
1.1469"
1.1431"
1 3/16-16 UN-3B
1.1875-16 UN-3B
1.1469"
1.1519"
1 3/16-18 UNEF-2A
1.1875-18 UNEF-2A
1.1499"
1.1450"
1 3/16-18 UNEF-2B
1.1875-18 UNEF-2B
1.1514"
1.1577"
1 3/16-18 UNEF-3A
1.1875-18 UNEF-3A
1.1514"
1.1478"
1 3/16-18 UNEF-3B
1.1875-18 UNEF-3B
1.1514"
1.1561"
1 3/16-20 UN-2A
1.1875-20 UN-2A
1.1536"
1.1489"
1 3/16-20 UN-2B
1.1875-20 UN-2B
1.1550"
1.1611"
1 3/16-20 UN-3A
1.1875-20 UN-3A
1.1550"
1.1515"
1 3/16-20 UN-3B
1.1875-20 UN-3B
1.1550"
1.1595"
1 3/16-28 UN-2A
1.1875-28 UN-2A
1.1631"
1.1590"
1 3/16-28 UN-2B
1.1875-28 UN-2B
1.1643"
1.1696"
1 3/16-28 UN-3A
1.1875-28 UN-3A
1.1643"
1.1612"
1 3/16-28 UN-3B
1.1875-28 UN-3B
1.1643"
1.1683"
1 1/4-7 UNC-1A
1.2500-7 UNC-1A
1.1550"
1.1439"
1 1/4-7 UNC-1B
1.2500-7 UNC-1B
1.1572"
1.1716"
1 1/4-7 UNC-2A
1.2500-7 UNC-2A
1.1550"
1.1476"
1 1/4-7 UNC-2B
1.2500-7 UNC-2B
1.1572"
1.1668"
1 1/4-7 UNC-3A
1.2500-7 UNC-3A
1.1572"
1.1517"
1 1/4-7 UNC-3B
1.2500-7 UNC-3B
1.1572"
1.1644"
1 1/4-8 UN-2A
1.2500-8 UN-2A
1.1667"
1.1597"
1 1/4-8 UN-2B
1.2500-8 UN-2B
1.1688"
1.1780"
1 1/4-8 UN-3A
1.2500-8 UN-3A
1.1688"
1.1635"
1 1/4-8 UN-3B
1.2500-8 UN-3B
1.1688"
1.1757"
1 1/4-10 UNS-2A
1.2500-10 UNS-2A
1.1831"
1.1768"
1 1/4-10 UNS-2B
1.2500-10 UNS-2B
1.1850"
1.1932"
1 1/4-12 UNF-1A
1.2500-12 UNF-1A
1.1941"
1.1849"
1 1/4-12 UNF-1B
1.2500-12 UNF-1B
1.1959"
1.2079"
1 1/4-12 UNF-2A
1.2500-12 UNF-2A
1.1941"
1.1879"
1 1/4-12 UNF-2B
1.2500-12 UNF-2B
1.1959"
1.2039"
1 1/4-12 UNF-3A
1.2500-12 UNF-3A
1.1959"
1.1913"
1 1/4-12 UNF-3B
1.2500-12 UNF-3B
1.1959"
1.2019"
1 1/4-14 UNS-2A
1.2500-14 UNS-2A
1.2020"
1.1966"
1 1/4-14 UNS-2B
1.2500-14 UNS-2B
1.2036"
1.2106"
1 1/4-16 UN-2A
1.2500-16 UN-2A
1.2079"
1.2028"
1 1/4-16 UN-2B
1.2500-16 UN-2B
1.2094"
1.2160"
1 1/4-16 UN-3A
1.2500-16 UN-3A
1.2094"
1.2056"
1 1/4-16 UN-3B
1.2500-16 UN-3B
1.2094"
1.2144"
1 1/4-18 UNEF-2A
1.2500-18 UNEF-2A
1.2124"
1.2075"
1 1/4-18 UNEF-2B
1.2500-18 UNEF-2B
1.2139"
1.2202"
1 1/4-18 UNEF-3A
1.2500-18 UNEF-3A
1.2139"
1.2103"
1 1/4-18 UNEF-3B
1.2500-18 UNEF-3B
1.2139"
1.2186"
1 1/4-20 UN-2A
1.2500-20 UN-2A
1.2161"
1.2114"
1 1/4-20 UN-2B
1.2500-20 UN-2B
1.2175"
1.2236"
1 1/4-20 UN-3A
1.2500-20 UN-3A
1.2175"
1.2140"
1 1/4-20 UN-3B
1.2500-20 UN-3B
1.2175"
1.2220"
1 1/4-24 UNS-2A
1.2500-24 UNS-2A
1.2216"
1.2173"
1 1/4-24 UNS-2B
1.2500-24 UNS-2B
1.2229"
1.2285"
1 1/4-28 UN-2A
1.2500-28 UN-2A
1.2256"
1.2215"
1 1/4-28 UN-2B
1.2500-28 UN-2B
1.2268"
1.2321"
1 1/4-28 UN-3A
1.2500-28 UN-3A
1.2268"
1.2237"
1 1/4-28 UN-3B
1.2500-28 UN-3B
1.2268"
1.2308"
1 5/16-8 UN-2A
1.3125-8 UN-2A
1.2292"
1.2221"
1 5/16-8 UN-2B
1.3125-8 UN-2B
1.2313"
1.2405"
1 5/16-8 UN-3A
1.3125-8 UN-3A
1.2313"
1.2260"
1 5/16-8 UN-3B
1.3125-8 UN-3B
1.2313"
1.2382"
1 5/16-12 UN-2A
1.3125-12 UN-2A
1.2567"
1.2509"
1 5/16-12 UN-2B
1.3125-12 UN-2B
1.2584"
1.2659"
1 5/16-12 UN-3A
1.3125-12 UN-3A
1.2584"
1.2541"
1 5/16-12 UN-3B
1.3125-12 UN-3B
1.2584"
1.2640"
1 5/16-16 UN-2A
1.3125-16 UN-2A
1.2704"
1.2653"
1 5/16-16 UN-2B
1.3125-16 UN-2B
1.2719"
1.2785"
1 5/16-16 UN-3A
1.3125-16 UN-3A
1.2719"
1.2681"
1 5/16-16 UN-3B
1.3125-16 UN-3B
1.2719"
1.2769"
1 5/16-18 UNEF-2A
1.3125-18 UNEF-2A
1.2749"
1.2700"
1 5/16-18 UNEF-2B
1.3125-18 UNEF-2B
1.2764"
1.2827"
1 5/16-18 UNEF-3A
1.3125-18 UNEF-3A
1.2764"
1.2728"
1 5/16-18 UNEF-3B
1.3125-18 UNEF-3B
1.2764"
1.2811"
1 5/16-20 UN-2A
1.3125-20 UN-2A
1.2786"
1.2739"
1 5/16-20 UN-2B
1.3125-20 UN-2B
1.2800"
1.2861"
1 5/16-20 UN-3A
1.3125-20 UN-3A
1.2800"
1.2765"
1 5/16-20 UN-3B
1.3125-20 UN-3B
1.2800"
1.2845"
1 5/16-28 UN-2A
1.3125-28 UN-2A
1.2881"
1.2840"
1 5/16-28 UN-2B
1.3125-28 UN-2B
1.2893"
1.2946"
1 5/16-28 UN-3A
1.3125-28 UN-3A
1.2893"
1.2862"
1 5/16-28 UN-3B
1.3125-28 UN-3B
1.2893"
1.2933"
1 3/8-6 UNC-1A
1.3750-6 UNC-1A
1.2643"
1.2523"
1 3/8-6 UNC-1B
1.3750-6 UNC-1B
1.2667"
1.2822"
1 3/8-6 UNC-2A
1.3750-6 UNC-2A
1.2643"
1.2563"
1 3/8-6 UNC-2B
1.3750-6 UNC-2B
1.2667"
1.2771"
1 3/8-6 UNC-3A
1.3750-6 UNC-3A
1.2667"
1.2607"
1 3/8-6 UNC-3B
1.3750-6 UNC-3B
1.2667"
1.2745"
1 3/8-8 UN-2A
1.3750-8 UN-2A
1.2916"
1.2844"
1 3/8-8 UN-2B
1.3750-8 UN-2B
1.2938"
1.3031"
1 3/8-8 UN-3A
1.3750-8 UN-3A
1.2938"
1.2884"
1 3/8-8 UN-3B
1.3750-8 UN-3B
1.2938"
1.3008"
1 3/8-10 UNS-2A
1.3750-10 UNS-2A
1.3081"
1.3018"
1 3/8-10 UNS-2B
1.3750-10 UNS-2B
1.3100"
1.3182"
1 3/8-12 UNF-1A
1.3750-12 UNF-1A
1.3190"
1.3096"
1 3/8-12 UNF-1B
1.3750-12 UNF-1B
1.3209"
1.3332"
1 3/8-12 UNF-2A
1.3750-12 UNF-2A
1.3190"
1.3127"
1 3/8-12 UNF-2B
1.3750-12 UNF-2B
1.3209"
1.3291"
1 3/8-12 UNF-3A
1.3750-12 UNF-3A
1.3209"
1.3162"
1 3/8-12 UNF-3B
1.3750-12 UNF-3B
1.3209"
1.3270"
1 3/8-14 UNS-2A
1.3750-14 UNS-2A
1.3270"
1.3216"
1 3/8-14 UNS-2B
1.3750-14 UNS-2B
1.3286"
1.3356"
1 3/8-16 UN-2A
1.3750-16 UN-2A
1.3329"
1.3278"
1 3/8-16 UN-2B
1.3750-16 UN-2B
1.3344"
1.3410"
1 3/8-16 UN-3A
1.3750-16 UN-3A
1.3344"
1.3306"
1 3/8-16 UN-3B
1.3750-16 UN-3B
1.3344"
1.3394"
1 3/8-18 UNEF-2A
1.3750-18 UNEF-2A
1.3374"
1.3325"
1 3/8-18 UNEF-2B
1.3750-18 UNEF-2B
1.3389"
1.3452"
1 3/8-18 UNEF-3A
1.3750-18 UNEF-3A
1.3389"
1.3353"
1 3/8-18 UNEF-3B
1.3750-18 UNEF-3B
1.3389"
1.3436"
1 3/8-20 UN-2A
1.3750-20 UN-2A
1.3341"
1.3364"
1 3/8-20 UN-2B
1.3750-20 UN-2B
1.3425"
1.3486"
1 3/8-20 UN-3A
1.3750-20 UN-3A
1.3425"
1.3390"
1 3/8-20 UN-3B
1.3750-20 UN-3B
1.3425"
1.3470"
1 3/8-24 UNS-2A
1.3750-24 UNS-2A
1.3466"
1.3241"
1 3/8-24 UNS-2B
1.3750-24 UNS-2B
1.3479"
1.3535"
1 3/8-28 UN-2A
1.3750-28 UN-2A
1.3506"
1.3465"
1 3/8-28 UN-2B
1.3750-28 UN-2B
1.3518"
1.3571"
1 3/8-28 UN-3A
1.3750-28 UN-3A
1.3518"
1.3487"
1 3/8-28 UN-3B
1.3750-28 UN-3B
1.3518"
1.3558"
1 7/16-6 UN-2A
1.4375-6 UN-2A
1.3268"
1.3188"
1 7/16-6 UN-2B
1.4375-6 UN-2B
1.3292"
1.3396"
1 7/16-6 UN-3A
1.4375-6 UN-3A
1.3292"
1.3232"
1 7/16-6 UN-3B
1.4375-6 UN-3B
1.3292"
1.3370"
1 7/16-8 UN-2A
1.4375-8 UN-2A
1.3541"
1.3469"
1 7/16-8 UN-2B
1.4375-8 UN-2B
1.3563"
1.3657"
1 7/16-8 UN-3A
1.4375-8 UN-3A
1.3563"
1.3509"
1 7/16-8 UN-3B
1.4375-8 UN-3B
1.3563"
1.3634"
1 7/16-12 UN-2A
1.4375-12 UN-2A
1.3816"
1.3757"
1 7/16-12 UN-2B
1.4375-12 UN-2B
1.3834"
1.3910"
1 7/16-12 UN-3A
1.4375-12 UN-3A
1.3834"
1.3790"
1 7/16-12 UN-3B
1.4375-12 UN-3B
1.3834"
1.3891"
1 7/16-16 UN-2A
1.4375-16 UN-2A
1.3953"
1.3901"
1 7/16-16 UN-2B
1.4375-16 UN-2B
1.3969"
1.4037"
1 7/16-16 UN-3A
1.4375-16 UN-3A
1.3969"
1.3930"
1 7/16-16 UN-3B
1.4375-16 UN-3B
1.3969"
1.4020"
1 7/16-18 UNEF-2A
1.4375-18 UNEF-2A
1.3999"
1.3949"
1 7/16-18 UNEF-2B
1.4375-18 UNEF-2B
1.4014"
1.4079"
1 7/16-18 UNEF-3A
1.4375-18 UNEF-3A
1.4014"
1.3977"
1 7/16-18 UNEF-3B
1.4375-18 UNEF-3B
1.4014"
1.4062"
1 7/16-20 UN-2A
1.4375-20 UN-2A
1.4026"
1.3988"
1 7/16-20 UN-2B
1.4375-20 UN-2B
1.4050"
1.4112"
1 7/16-20 UN-3A
1.4375-20 UN-3A
1.4050"
1.4014"
1 7/16-20 UN-3B
1.4375-20 UN-3B
1.4050"
1.4096"
1 7/16-28 UN-2A
1.4375-28 UN-2A
1.4130"
1.4088"
1 7/16-28 UN-2B
1.4375-28 UN-2B
1.4143"
1.4198"
1 7/16-28 UN-3A
1.4375-28 UN-3A
1.4143"
1.4112"
1 7/16-28 UN-3B
1.4375-28 UN-3B
1.4143"
1.4184"
1 1/2-6 UNC-1A
1.5000-6 UNC-1A
1.3893"
1.3772"
1 1/2-6 UNC-1B
1.5000-6 UNC-1B
1.3917"
1.4075"
1 1/2-6 UNC-2A
1.5000-6 UNC-2A
1.3893"
1.3813"
1 1/2-6 UNC-2B
1.5000-6 UNC-2B
1.3917"
1.4022"
1 1/2-6 UNC-3A
1.5000-6 UNC-3A
1.3917"
1.3856"
1 1/2-6 UNC-3B
1.5000-6 UNC-3B
1.3917"
1.3996"
1 1/2-8 UN-2A
1.5000-8 UN-2A
1.4166"
1.4093"
1 1/2-8 UN-2B
1.5000-8 UN-2B
1.4188"
1.4283"
1 1/2-8 UN-3A
1.5000-8 UN-3A
1.4188"
1.4133"
1 1/2-8 UN-3B
1.5000-8 UN-3B
1.4188"
1.4259"
1 1/2-10 UNS-2A
1.5000-10 UNS-2A
1.4331"
1.4267"
1 1/2-10 UNS-2B
1.5000-10 UNS-2B
1.4350"
1.4433"
1 1/2-12 UNF-1A
1.5000-12 UNF-1A
1.4440"
1.4344"
1 1/2-12 UNF-1B
1.5000-12 UNF-1B
1.4459"
1.4584"
1 1/2-12 UNF-2A
1.5000-12 UNF-2A
1.4440"
1.4376"
1 1/2-12 UNF-2B
1.5000-12 UNF-2B
1.4459"
1.4542"
1 1/2-12 UNF-3A
1.5000-12 UNF-3A
1.4459"
1.4411"
1 1/2-12 UNF-3B
1.5000-12 UNF-3B
1.4459"
1.4522"
1 1/2-14 UNS-2A
1.5000-14 UNS-2A
1.4519"
1.4464"
1 1/2-14 UNS-2B
1.5000-14 UNS-2B
1.4536"
1.4608"
1 1/2-16 UN-2A
1.5000-16 UN-2A
1.4578"
1.4526"
1 1/2-16 UN-2B
1.5000-16 UN-2B
1.4594"
1.4662"
1 1/2-16 UN-3A
1.5000-16 UN-3A
1.4594"
1.4555"
1 1/2-16 UN-3B
1.5000-16 UN-3B
1.4594"
1.4545"
1 1/2-18 UNEF-2A
1.5000-18 UNEF-2A
1.4624"
1.4574"
1 1/2-18 UNEF-2B
1.5000-18 UNEF-2B
1.4639"
1.4704"
1 1/2-18 UNEF-3A
1.5000-18 UNEF-3A
1.4639"
1.4602"
1 1/2-18 UNEF-3B
1.5000-18 UNEF-3B
1.4639"
1.4687"
1 1/2-20 UN-2A
1.5000-20 UN-2A
1.4661"
1.4613"
1 1/2-20 UN-2B
1.5000-20 UN-2B
1.4675"
1.4737"
1 1/2-20 UN-3A
1.5000-20 UN-3A
1.4675"
1.4639"
1 1/2-20 UN-3B
1.5000-20 UN-3B
1.4675"
1.4721"
1 1/2-24 UNS-2A
1.5000-24 UNS-2A
1.4716"
1.4672"
1 1/2-24 UNS-2B
1.5000-24 UNS-2B
1.4729"
1.4787"
1 1/2-28 UN-2A
1.5000-28 UN-2A
1.4755"
1.4713"
1 1/2-28 UN-2B
1.5000-28 UN-2B
1.4768"
1.4823"
1 1/2-28 UN-3A
1.5000-28 UN-3A
1.4768"
1.4737"
1 1/2-28 UN-3B
1.5000-28 UN-3B
1.4768"
1.4809"
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