In oil country, unions are commonly used pipeline connection components. ACME threads are widely used in unions, which are summarized as follows:
| Union Type | Pipe Size | Threaded End Connection | T.P.I | Member |
| Fig100 | 2″ | 3-1/2″-3 STUB ACME-2G | 3 | Go/No Go |
| 2-1/2″ | 3-7/8″-3 STUB ACME-2G | 3 | ||
| 3″ | 4-13/16″-3 STUB ACME-2G | 3 | ||
| 4″ | 6-1/8″-3 STUB ACME-2G | 3 | ||
| 6″ | 8-7/8″-3 ACME-2G | 3 | ||
| 8″ | 8-1/4″-3 ACME-2G | 3 | ||
| Fig200 | 1″ | 2-7/16″-6 ACME-2G | 6 | Go/No Go |
| 1-1/4″ | 2-15/16″-6 ACME-2G | 6 | ||
| 1-1/2″ | 3-5/8″-6 ACME-2G | 6 | ||
| 2″ | 3-13/32-4 ACME-2G | 4 | ||
| 3-1/2″-4 ACME-2G | 4 | |||
| 2-1/2″ | 4-1/16″-4 ACME-2G | 4 | ||
| 3″ | 4-13/16″-4 ACME-2G | 4 | ||
| 4″ | 6-1/8″-3 STUB ACME-2G | 3 | ||
| Fig206 | 1″ | 2-7/16″-6 ACME-2G | 6 | Go/No Go |
| 1-1/4″ | 2-15/16″-6 ACME-2G | 6 | ||
| 1-1/2″ | 3-5/8″-6 ACME-2G | 6 | ||
| 2″ | 3-13/16″-4 ACME-2G | 4 | ||
| 2-1/2″ | 4-3/16″-4-ACME-2G | 4 | ||
| 3″ | 4-7/8″-4 ACME-2G | 4 | ||
| 4″ | 6-1/8″-3 STUB ACME-2G | 3 | ||
| 6″ | 8-2/7″-3 ACME-2G | 3 | ||
| 8″ | 10-15/32″-3 ACME-2G | 3 | ||
| 10″ | 12-11/16″-3 ACME-2G | 3 | ||
| Fig207 | 3″ | 5-1/8″-4 ACME-2G | 4 | Go/No Go |
| 4″ | 6-3/8″-3 STUB ACME-2G | 3 | ||
| 6″ | 8-2/7″-3 ACME-2G | 3 | ||
| 8″ | 10-15/32″-3 ACME-2G | 3 | ||
| 10″ | 12-11/16″-3 ACME-2G | 3 | ||
| Fig211 | 1″ | 2-7/16″-6 ACME-2G | 6 | Go/No Go |
| 1-1/4″ | 2-15/16″-6 ACME-2G | 6 | ||
| 1-1/2″ | 3-5/8″-6 ACME-2G | 6 | ||
| 2″ | 3-13/16″-4 ACME-2G | 4 | ||
| 2-1/2″ | 4-3/16″-4-ACME-2G | 4 | ||
| 3″ | 5-3/8″-4 ACME-2G | 4 | ||
| 4″ | 6-1/4″-3 STUB ACME-2G | 3 | ||
| Fig400 | 2″ | 3-13/16″-3 ACME-2G | 3 | Go/No Go |
| 2-1/2″ | 4-3/16″-3 ACME-2G | 3 | ||
| 3″ | 5-3/8″-3 ACME-2G | 3 | ||
| 4″ | 6-1/4″-3 ACME-2G | 3 | ||
| 5-1/2″ | 7-3/8″-3 ACME-2G | 3 | ||
| 6″ | 8-5/7″-3 ACME-2G | 3 | ||
| 7″ | 9-3/8″-3 ACME-2G | 3 | ||
| 8″ | 10-11/16″-3 ACME-2G | 3 | ||
| 10″ | 12-3/8-3 ACME-2G | 3 | ||
| 12″ | 14-5/7″-3 ACME-2G | 3 | ||
| Fig600 | 1″ | 2-7/16″-6 ACME-2G | 6 | Go/No Go |
| 1-1/2″ | 3-5/8″-4 ACME-2G | 4 | ||
| 2″ | 3-13/16″-2 ACME-2G | 2 | ||
| 2-1/2″ | 4-3/16″-2-ACME-2G | 2 | ||
| 3″ | 5-3/8″-2 ACME-2G | 2 | ||
| 4″ | 6-1/4″-2 ACME-2G | 2 | ||
| Fig602 | 1″ | 2-7/16″-6 ACME-2G | 6 | Go/No Go |
| 1-1/4″ | 2-15/16″-4 ACME-2G | 4 | ||
| 1-1/2″ | 3-5/8″-4 ACME-2G | 4 | ||
| 2″ | 3-13/16″-3 STUB ACME-2G | 3 | ||
| 2-1/2″ | 4-3/16″-3 STUB ACME-2G | 3 | ||
| 3″ | 5-3/8″-3 STUB ACME-2G | 3 | ||
| 4″ | 6-1/4″-3 STUB ACME-2G | 3 | ||
| Fig1002 | 1″ | 2-15/16″-6 ACME-2G | 6 | Go/No Go |
| 1-1/4″ | 2-15/16″-4 ACME-2G | 4 | ||
| 1-1/2″ | 3-5/8″-4 ACME-2G | 4 | ||
| 2″ | 3-13/16″-3 STUB ACME-2G | 3 | ||
| 2-1/2″ | 4-7/8″-4 ACME-2G | 4 | ||
| 3″ | 5-3/8″-4 ACME-2G | 4 | ||
| 4″ | 6-1/4″-4 ACME-2G | 4 | ||
| 5″ | 7-3/8″-3 ACME-2G | 3 | ||
| 6″ | 8-5/7″-3 ACME-2G | 3 | ||
| Fig1002 | 2″ | 3-13/16″-4 ACME-2G | 4 | Go/No Go |
| 3″ | 5-7/8″-4 ACME-2G | 4 | ||
| 4″ | 6-7/8″-4 ACME-2G | 4 | ||
| 5″ | 6-7/8″-4 ACME-2G | 4 | ||
| Fig1502 | 1″ | 2-15/16″-3.5 ACME-2G | 3.5 | Go/No Go |
| 1-1/2″ | 3-5/8″-3.5 ACME-2G | 3.5 | ||
| 2″ | 4-1/8″-3 ACME-2G | 3 | ||
| 2-1/2″ | 4-7/8″-3 ACME-2G | 3 | ||
| 3″ | 5-3/8″-3.5 ACME-2G | 3.5 | ||
| 4″ | 6-11/16″-3 ACME-2G | 3 | ||
| Fig2002 | 2″ | 3-5/8″-4 ACME-2G | 4 | Go/No Go |
| 3″ | 6-11/16″-4 ACME-2G | 4 | ||
| Fig2202 | 2″ | 3-7/8″-5 ACME-2G | 5 | Go/No Go |
| 2-1/2″ | 4-15/16″-5 ACME-2G | 5 | ||
| 3″ | 6-15/16″-5 ACME-2G | 5 |
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Stub ACME Screw Thread Ring Gauge