How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Low-Pressure Aluminum Threaded Pipe Flanges
Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.
Reducing flanges allow you to transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k231p1-c01d-digitall@halfx_637069814226822487.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k231p2-c01d-digitall@halfx_637069808350186229.png?ver=imagenotfound)
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met:
Pipe Size 1-6: ASME B16.1 - Fittings: Use Class 150 aluminum
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
NPT | ||||||||
1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 psi @ 72° F | 000000000 | 000000 |
3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 00000 |
4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/4x-/4x-i126-44695k145l1master--2306c4907931610040676-p9@halfx_637456159905725616.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k715p1-c01d-digitall@halfx_637069811803774500.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k231-@halfx_637079385551919747.png?ver=imagenotfound)
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met: ASME B16.1
- Fittings: Use Class 150 aluminum
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Bolt Hole | |||||||||
---|---|---|---|---|---|---|---|---|---|
Pipe Size | For Flange Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
NPT | |||||||||
1/2 | 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
3/4 | 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
1 | 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/4 | 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/2 | 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
2 | 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
2 | 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 000000 |
3 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
4 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
6 | 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
Aluminum Unthreaded Pipe Flanges
Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.
Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld. Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides. Reducing flanges let you transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions. Cap flanges are also known as blind flanges.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k545cast-stainless-steelpositive_front_positive_right_flop15_1632916744_128@halfx_637684959089930656.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k545p2-c01d-digitall@halfx_637069812350656020.png?ver=imagenotfound)
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 psi @ 72° F | 000000000 | 000000 |
3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 000000 |
2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 000000 |
4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k361cast-stainless-steelpositive_front_positive_right_flop15_1632918016_516@halfx_637684970600750995.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k361p2-c01d-digitall@halfx_637069793820238952.png?ver=imagenotfound)
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 psi @ 72° F | 00000000 | 000000 |
3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 00000000 | 00000 |
1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 00000 |
4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/4x-/4x-i126-44695k145l1master--2306c4907931610040676-p9@halfx_637456159905725616.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k762-@halfx_637685074415561198.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k361p2-c01d-digitall@halfx_637069793820238952.png?ver=imagenotfound)
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k533p1-c01d-digitall@halfx_637069811492669208.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/447/44705k532p1-c01d-digitall@halfx_637069819004274859.png?ver=imagenotfound)
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 psi @ 72° F | 000000000 | 000000 |
3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 000000 |
4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
Metal Cam-and-Groove Hose Couplings for Water
![](/prerenderstable/mvPRE/contents/gfx/imagecache/208/2084t42-t12c1-c01h-digital-master1572989813-p9@halfx_637085721788986714.png?ver=imagenotfound)
A complete coupling consists of a plug and a socket (both sold separately) that allow you to quickly connect and disconnect medium-to large-diameter hose lines. To connect, insert the plug into the socket and press the levers down. The levers fit snugly into the groove on the plug’s body and force the plug against the gasket to form a tight seal. To disconnect, lift both levers and pull out the plug.
Plugs with flanged end are also known as PFA adapters. Bolt the flanged end to another same-size flange with a gasket (sold separately).
Aluminum couplings are lighter in weight than brass plugs and sockets. They have good abrasion and corrosion resistance. Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: Relieve all pressure before disconnecting the couplings. Do not use cam-and-groove couplings with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/208/2084t125p1-c01h-digital@halfx_637085701914081853.png?ver=imagenotfound)
- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Specifications Met: ASME B16.5, Fed. Spec. A-A-59326
- Compatible With: Andrews Cam-and-Groove Couplings, Dixon Cam-and-Groove Couplings, Ever-Tite Cam-and-Groove Couplings, PT Coupling Cam-and-Groove Couplings
Bolt Holes | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Coupling Size | Plug OD | Pipe Size | Flange OD | Flanged Connection Surface | Pressure Class | Max. Pressure | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Each | |
Anodized Aluminum | ||||||||||||
2 | 2 1/2" | 2 | 6" | Flat | 150 | 250 psi @ 72° F | 5/8" | 3/4" | 4 | 4 3/4" | 00000000 | 0000000 |
3 | 3 5/8" | 3 | 7 1/2" | Flat | 150 | 200 psi @ 72° F | 5/8" | 3/4" | 4 | 6" | 00000000 | 000000 |
4 | 4 3/4" | 4 | 9" | Flat | 150 | 150 psi @ 72° F | 5/8" | 3/4" | 8 | 7 1/2" | 00000000 | 000000 |
6 | 6 15/16" | 6 | 11" | Flat | 150 | 75 psi @ 72° F | 3/4" | 7/8" | 8 | 9 1/2" | 00000000 | 000000 |