Filter by
Pipe Material
Fitting Type
Flanged Connection Surface
Maximum Steam Pressure @ Temperature
For Use With
Bolt Circle Diameter
Connects To
Gender
Pipe Finish
RoHS
Export Control Classification Number (ECCN)
DFARS Specialty Metals
About Pipe and Fittings
%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20400%20400'%20style='enable-background:new%200%200%20400%20400;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill:%231A70A0;}%20.st1{opacity:0.5;}%20%3c/style%3e%3cg%3e%3cg%3e%3cpath%20class='st0'%20d='M200,56.9c38.35,0,74.4,14.93,101.51,42.05c27.11,27.11,42.05,63.17,42.05,101.51s-14.93,74.4-42.05,101.51%20S238.35,344.02,200,344.02s-74.4-14.93-101.51-42.05c-27.11-27.11-42.05-63.17-42.05-101.51s14.93-74.4,42.05-101.51%20S161.65,56.9,200,56.9%20M200,12.9C96.41,12.9,12.44,96.88,12.44,200.46c0,103.59,83.97,187.56,187.56,187.56%20c103.59,0,187.56-83.97,187.56-187.56C387.56,96.88,303.59,12.9,200,12.9L200,12.9z'/%3e%3c/g%3e%3cg%3e%3cg%20class='st1'%3e%3cpath%20class='st0'%20d='M235.49,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C190.89,163.58,214.53,158.88,235.49,152.24z%20M230.44,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C218.68,82.23,224.24,80.84,230.44,80.84z'/%3e%3c/g%3e%3cg%3e%3cpath%20class='st0'%20d='M214.08,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C169.48,163.58,193.11,158.88,214.08,152.24z%20M209.03,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C197.26,82.23,202.83,80.84,209.03,80.84z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e){kind=small}
Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges
Flanges
 |  |
Front | Raised Surface on Back |
Pipe Size | Bolt Hole | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | Flanged Connection Surface (B) | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Material | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | |||
NPT Female | |||||||||||||||
| 1/2 | 1/2 | Raised | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K119 | 000000 | ||
| 3/4 | 3/4 | Raised | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K121 | 00000 | ||
| 1 | 1 | Raised | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K122 | 00000 | ||
| 1 1/4 | 1 1/4 | Raised | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K123 | 00000 | ||
| 1 1/2 | 1 1/2 | Raised | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K124 | 00000 | ||
| 2 | 2 | Raised | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K125 | 00000 | ||
| 2 1/2 | 2 1/2 | Raised | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K126 | 00000 | ||
| 3 | 3 | Raised | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K127 | 00000 | ||
| 4 | 4 | Raised | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K128 | 000000 | ||
| 5 | 5 | Raised | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K129 | 000000 | ||
| 6 | 6 | Raised | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K131 | 000000 | ||
| 8 | 8 | Raised | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 7551K133 | 000000 | ||
BSPT Female | |||||||||||||||
| 2 | 2 | Raised | 6" | 3/4" | 3/4" | 4 | 4 3/4" | 150 | Galvanized Steel | 285 psi @ 72° F | 150 psi @ 300° F | 1584N5 | 000000 | ||
High-Pressure Galvanized Iron and Steel Threaded Pipe Flanges
Flanges
 |  |
Front | Raised Surface on Back |
Pipe Size | Bolt Hole | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | Flanged Connection Surface (B) | Flange OD | For Bolt Dia. | Dia. | No. Of | Bolt Circle Dia. | Pressure Class | Material | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | Each | |||
NPT Female | |||||||||||||||
| 3/4 | 3/4 | Raised | 4 5/8" | 3/4" | 3/4" | 4 | 3 1/4" | 300 | Galvanized Steel | 600 psi @ 72° F | Not Rated | 1733N12 | 0000000 | ||
| 1 | 1 | Raised | 4 7/8" | 3/4" | 3/4" | 4 | 3 1/2" | 300 | Galvanized Steel | 600 psi @ 72° F | Not Rated | 1733N13 | 00000 | ||
| 1 1/4 | 1 1/4 | Raised | 5 1/4" | 3/4" | 3/4" | 4 | 3 7/8" | 300 | Galvanized Steel | 600 psi @ 72° F | Not Rated | 1733N14 | 000000 | ||
| 1 1/2 | 1 1/2 | Raised | 6 1/8" | 7/8" | 0.88" | 4 | 4 1/2" | 300 | Galvanized Steel | 600 psi @ 72° F | Not Rated | 1733N15 | 00000 | ||
| 2 | 2 | Raised | 6 1/2" | 3/4" | 3/4" | 8 | 5" | 300 | Galvanized Steel | 600 psi @ 72° F | Not Rated | 1733N16 | 000000 | ||
| 3 | 3 | Raised | 8 1/4" | 7/8" | 0.88" | 8 | 6 5/8" | 300 | Galvanized Steel | 600 psi @ 72° F | Not Rated | 1733N17 | 000000 | ||
| 4 | 4 | Raised | 10" | 7/8" | 0.88" | 8 | 7 7/8" | 300 | Galvanized Steel | 600 psi @ 72° F | Not Rated | 1733N18 | 000000 | ||
Steel Hex Head Screw Kits for Metal Pipe Flanges
 |  |
Shown Installed |
Join steel or cast iron pipe flanges. These kits come with screws and nuts in the right size and number to match your flange's bolt holes. The screws have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.
Screw length is measured from under the head. For a tight seal, you’ll also need a gasket between the flanges.
Hot-Dipped Galvanized Steel—The strength of steel with the rust resistance of stainless steel. These screws are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. The galvanized finish is thicker than other types of coatings, so the threads may be more likely to stick during installation. You can only mate these screws with hot-dipped galvanized nuts.
Screw | Nut | Hot-Dipped Galvanized Steel Screws and Nuts | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Pipe Size | Thread Size | Lg. | Head Wd. | Head Ht. | Threading | Thread Spacing | Tensile Strength, psi | Wd. | Ht. | Includes | Each | |||
For Class 125/150 Flanges | ||||||||||||||
| 1/2, 3/4 | 1/2"-13 | 2" | 3/4" | 11/32" | Partially Threaded | Coarse | 60,000 | 3/4" | 7/16" | 4 Hex Head Screws 4 Hex Nuts | 97788A125 | 00000 | ||
| 1, 1 1/4 | 1/2"-13 | 2 1/4" | 3/4" | 11/32" | Partially Threaded | Coarse | 60,000 | 3/4" | 7/16" | 4 Hex Head Screws 4 Hex Nuts | 97788A127 | 0000 | ||
| 1 1/2 | 1/2"-13 | 2 1/2" | 3/4" | 11/32" | Partially Threaded | Coarse | 60,000 | 3/4" | 7/16" | 4 Hex Head Screws 4 Hex Nuts | 97788A128 | 0000 | ||
| 2 | 5/8"-11 | 2 3/4" | 15/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 15/16" | 35/64" | 4 Hex Head Screws 4 Hex Nuts | 97788A134 | 0000 | ||
| 2 1/2, 3 | 5/8"-11 | 3" | 15/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 15/16" | 35/64" | 4 Hex Head Screws 4 Hex Nuts | 97788A135 | 0000 | ||
| 3 1/2, 4 | 5/8"-11 | 3" | 15/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 15/16" | 35/64" | 8 Hex Head Screws 8 Hex Nuts | 97788A144 | 00000 | ||
| 5, 6 | 3/4"-10 | 3 1/4" | 1 1/8" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/8" | 41/64" | 8 Hex Head Screws 8 Hex Nuts | 97788A151 | 00000 | ||
| 10, 12 | 7/8"-9 | 4" | 1 5/16" | 37/64" | Partially Threaded | Coarse | 60,000 | 1 5/16" | 3/4" | 12 Hex Head Screws 12 Hex Nuts | 97788A154 | 00000 | ||
For Class 250/300 Flanges | ||||||||||||||
| 1/2 | 1/2"-13 | 2 1/4" | 3/4" | 11/32" | Partially Threaded | Coarse | 60,000 | 3/4" | 7/16" | 4 Hex Head Screws 4 Hex Nuts | 97788A123 | 0000 | ||
| 3/4, 1 | 5/8"-11 | 2 1/2" | 15/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 15/16" | 35/64" | 4 Hex Head Screws 4 Hex Nuts | 97788A129 | 0000 | ||
| 1 1/4 | 5/8"-11 | 2 3/4" | 15/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 15/16" | 35/64" | 4 Hex Head Screws 4 Hex Nuts | 97788A131 | 0000 | ||
| 1 1/2 | 3/4"-10 | 3" | 1 1/8" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/8" | 41/64" | 4 Hex Head Screws 4 Hex Nuts | 97788A139 | 0000 | ||
| 2 | 5/8"-11 | 3" | 15/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 15/16" | 35/64" | 8 Hex Head Screws 8 Hex Nuts | 97788A142 | 00000 | ||
| 2 1/2 | 3/4"-10 | 3 1/4" | 1 1/8" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/8" | 41/64" | 8 Hex Head Screws 8 Hex Nuts | 97788A148 | 00000 | ||
| 3 | 3/4"-10 | 3 1/2" | 1 1/8" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/8" | 41/64" | 8 Hex Head Screws 8 Hex Nuts | 97788A146 | 00000 | ||
| 3 1/2, 4 | 3/4"-10 | 3 3/4" | 1 1/8" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/8" | 41/64" | 8 Hex Head Screws 8 Hex Nuts | 97788A149 | 00000 | ||
| 6 | 3/4"-10 | 4 1/4" | 1 1/8" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/8" | 41/64" | 12 Hex Head Screws 12 Hex Nuts | 97788A153 | 00000 | ||
| 8 | 7/8"-9 | 4 3/4" | 1 5/16" | 37/64" | Partially Threaded | Coarse | 60,000 | 1 5/16" | 3/4" | 12 Hex Head Screws 12 Hex Nuts | 97788A157 | 000000 | ||
For PN10/PN16 Flanges | ||||||||||||||
| 2 | M16 × 2 mm | 55 mm | 24 mm | 10 mm | Partially Threaded | Coarse | 110,000 | 24 mm | 13 mm | 4 Hex Head Screws 4 Hex Nuts | 97788A114 | 00000 | ||
| 3, 4 | M16 × 2 mm | 60 mm | 24 mm | 10 mm | Partially Threaded | Coarse | 110,000 | 24 mm | 13 mm | 8 Hex Head Screws 8 Hex Nuts | 97788A115 | 00000 | ||
Steel Heavy Hex Head Screw Kits for Metal Pipe Flanges
 |  |
Shown Installed |
All the hardware you need to join steel or cast iron pipe flanges. These kits come with screws and nuts in the right size and number to match your flange's bolt holes. With screw heads and nuts that are about 10% wider than standard, these kits handle heavier loads by distributing them over a larger area. The head also gives you six, flat contact points, so wrenches and sockets won't slip and round off the drive.
Screw length is measured from under the head. For a tight seal, you’ll also need a gasket between the flanges.
Hot-Dipped Galvanized Steel—The strength of steel with the rust resistance of stainless steel. These screws are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. The galvanized finish is thicker than other types of coatings, so the threads may be more likely to stick during installation. You can only mate these screws with hot-dipped galvanized nuts.
Screw | Nut | Hot-Dipped Galvanized Steel Screws and Nuts | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Pipe Size | Thread Size | Lg. | Head Wd. | Head Ht. | Threading | Thread Spacing | Tensile Strength, psi | Wd. | Ht. | Includes | Each | |||
For Class 125/150 Flanges | ||||||||||||||
| 2 | 5/8"-11 | 2 3/4" | 1 1/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 1 1/16" | 39/64" | 4 Heavy Hex Head Screws 4 Heavy Hex Nuts | 97771A113 | 000000 | ||
| 2 1/2, 3 | 5/8"-11 | 3" | 1 1/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 1 1/16" | 39/64" | 4 Heavy Hex Head Screws 4 Heavy Hex Nuts | 97771A114 | 00000 | ||
| 3 1/2, 4 | 5/8"-11 | 3" | 1 1/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 1 1/16" | 39/64" | 8 Heavy Hex Head Screws 8 Heavy Hex Nuts | 97771A119 | 00000 | ||
| 5, 6 | 3/4"-10 | 3 1/4" | 1 1/4" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/4" | 47/64" | 8 Heavy Hex Head Screws 8 Heavy Hex Nuts | 97771A123 | 00000 | ||
For Class 250/300 Flanges | ||||||||||||||
| 2 | 5/8"-11 | 3" | 1 1/16" | 27/64" | Partially Threaded | Coarse | 60,000 | 1 1/16" | 39/64" | 8 Heavy Hex Head Screws 8 Heavy Hex Nuts | 97771A122 | 00000 | ||
| 3 | 3/4"-10 | 3 1/2" | 1 1/4" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/4" | 47/64" | 8 Heavy Hex Head Screws 8 Heavy Hex Nuts | 97771A124 | 00000 | ||
| 4 | 3/4"-10 | 3 3/4" | 1 1/4" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/4" | 47/64" | 8 Heavy Hex Head Screws 8 Heavy Hex Nuts | 97771A126 | 00000 | ||
| 6 | 3/4"-10 | 4 1/4" | 1 1/4" | 1/2" | Partially Threaded | Coarse | 60,000 | 1 1/4" | 47/64" | 12 Heavy Hex Head Screws 12 Heavy Hex Nuts | 97771A127 | 000000 | ||
