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DFARS Specialty Metals
About Pipe and Fittings
Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
SAE High-Pressure Stainless Steel Threaded Two-Piece Pipe Flanges
Forged Flanges
Bolt Hole | 316/316L Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
SAE Pipe Flange Size | Dash Size | Flanged Connection Surface | For Bolt Dia. | Dia. | No. Of | Max. Pressure @ Temp. | Each | |||
Flanged | ||||||||||
| 3/4 | 12 | O-Ring Groove | 3/8" | 0.406" | 4 | 5,000 psi @ 72° F | 1723N37 | 0000000 | ||
| 3/4 | 12 | O-Ring Groove | 10 mm | 10 mm | 4 | 5,000 psi @ 72° F | 1723N42 | 000000 | ||
| 1 | 16 | O-Ring Groove | 3/8" | 0.406" | 4 | 4,600 psi @ 72° F | 1723N38 | 000000 | ||
| 1 | 16 | O-Ring Groove | 10 mm | 10 mm | 4 | 4,600 psi @ 72° F | 1723N43 | 000000 | ||
| 1 1/2 | 24 | O-Ring Groove | 1/2" | 0.531" | 4 | 3,000 psi @ 72° F | 1723N39 | 000000 | ||
| 1 1/2 | 24 | O-Ring Groove | 12 mm | 13 mm | 4 | 3,000 psi @ 72° F | 1723N44 | 000000 | ||
| 2 | 32 | O-Ring Groove | 1/2" | 0.531" | 4 | 3,000 psi @ 72° F | 1723N41 | 000000 | ||
| 2 | 32 | O-Ring Groove | 12 mm | 13 mm | 4 | 3,000 psi @ 72° F | 1723N45 | 000000 | ||
Machined Flange Adapters
316/316L Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Pipe Size (A) | Thread Size (A) | For SAE Pipe Flange Size (B) | Dash Size (A) | For Flanged Connection Surface | Max. Pressure @ Temp. | Each | |||
NPTF Female | |||||||||
| 3/4 | — | 3/4 | 12 | O-Ring Groove | 5,000 psi @ 72° F | 1723N51 | 0000000 | ||
| 1 | — | 1 | 16 | O-Ring Groove | 4,600 psi @ 72° F | 1723N52 | 000000 | ||
| 1 1/2 | — | 1 1/2 | 24 | O-Ring Groove | 3,000 psi @ 72° F | 1723N53 | 000000 | ||
| 2 | — | 2 | 32 | O-Ring Groove | 3,000 psi @ 72° F | 1723N54 | 000000 | ||
UN/UNF (SAE Straight) Male | |||||||||
| — | 1 5/16"-12 | 1 | 16 | O-Ring Groove | 4,600 psi @ 72° F | 1723N47 | 000000 | ||
| — | 1 7/8"-12 | 1 1/2 | 24 | O-Ring Groove | 3,000 psi @ 72° F | 1723N48 | 000000 | ||
SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges
Machined Flanges
Dash Size | Bolt Hole | 316/316L Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size (A) | SAE Pipe Flange Size (B) | (A) | (B) | Flanged Connection Surface (B) | For Bolt Dia. | Dia. | No. Of | Max. Pressure @ Temp. | Each | |||
Socket-Connect Female | ||||||||||||
| 3/4 | 3/4 | 12 | 12 | O-Ring Groove | 3/8" | 0.406" | 4 | 5,000 psi @ 72° F | 1431N015 | 0000000 | ||
| 1 | 1 | 16 | 16 | O-Ring Groove | 3/8" | 0.406" | 4 | 5,000 psi @ 72° F | 1431N016 | 000000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | O-Ring Groove | 1/2" | 0.531" | 4 | 3,000 psi @ 72° F | 1431N017 | 000000 | ||
| 2 | 2 | 32 | 32 | O-Ring Groove | 1/2" | 0.531" | 4 | 3,000 psi @ 72° F | 1431N018 | 000000 | ||
Machined Blind Flanges
Bolt Hole | 316/316L Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
SAE Pipe Flange Size | Dash Size | Flanged Connection Surface | For Bolt Dia. | Dia. | No. Of | Max. Pressure @ Temp. | Each | |||
Flanged | ||||||||||
| 2 | 32 | O-Ring Groove | 1/2" | 0.531" | 4 | 3,000 psi @ 72° F | 1431N032 | 0000000 | ||
SAE High-Pressure Iron and Steel Unthreaded Pipe Flanges
Machined Flanges
Dash Size | Bolt Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size (A) | SAE Pipe Flange Size (B) | (A) | (B) | Flanged Connection Surface (B) | For Bolt Dia. | Dia. | No. Of | Material | Max. Pressure @ Temp. | Each | |||
Socket-Connect Female | |||||||||||||
| 3/4 | 3/4 | 12 | 12 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N38 | 000000 | ||
| 1 | 1 | 16 | 16 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N39 | 00000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N4 | 00000 | ||
| 1 1/2 | 1 1/2 | 24 | 24 | O-Ring Groove | 12 mm | 13 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N44 | 00000 | ||
| 2 | 2 | 32 | 32 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N41 | 00000 | ||
| 2 | 2 | 32 | 32 | O-Ring Groove | 12 mm | 13 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N45 | 00000 | ||
Machined Blind Flanges
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
SAE Pipe Flange Size | Dash Size | Flanged Connection Surface | For Bolt Dia. | Dia. | No. Of | Material | Max. Pressure @ Temp. | Each | |||
Flanged | |||||||||||
| 3/4 | 12 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N5 | 000000 | ||
| 1 | 16 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N51 | 00000 | ||
| 1 1/2 | 24 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N52 | 00000 | ||
| 2 | 32 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N53 | 00000 | ||
SAE High-Pressure Stainless Steel Threaded Pipe Flanges
Machined Flanges
Dash Size | Bolt Hole | 316/316L Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size (A) | Thread Size (A) | SAE Pipe Flange Size (B) | (A) | (B) | Flanged Connection Surface (B) | For Bolt Dia. | Dia. | No. Of | Max. Pressure @ Temp. | Each | |||
NPTF Female | |||||||||||||
| 3/4 | — | 3/4 | 12 | 12 | O-Ring Groove | 3/8" | 0.406" | 4 | 2,500 psi @ 72° F | 1723N15 | 0000000 | ||
| 1 | — | 1 | 16 | 16 | O-Ring Groove | 3/8" | 0.406" | 4 | 2,000 psi @ 72° F | 1723N16 | 000000 | ||
| 1 1/2 | — | 1 1/2 | 24 | 24 | O-Ring Groove | 1/2" | 0.531" | 4 | 1,000 psi @ 72° F | 1723N17 | 000000 | ||
| 2 | — | 2 | 32 | 32 | O-Ring Groove | 1/2" | 0.531" | 4 | 1,000 psi @ 72° F | 1723N18 | 000000 | ||
UN/UNF (SAE Straight) Female | |||||||||||||
| — | 1 5/16"-12 | 1 | 16 | 16 | O-Ring Groove | 3/8" | 0.406" | 4 | 6,000 psi @ 72° F | 1723N29 | 000000 | ||
SAE High-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges
Forged Flanges
![]() |
Flange |
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
SAE Pipe Flange Size | Dash Size | Flanged Connection Surface | For Bolt Dia. | Dia. | No. Of | Material | Max. Pressure @ Temp. | Each | |||
Flanged | |||||||||||
| 1 | 16 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N59 | 000000 | ||
| 1 | 16 | O-Ring Groove | 10 mm | 11 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N63 | 00000 | ||
| 1 1/2 | 24 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N6 | 00000 | ||
| 1 1/2 | 24 | O-Ring Groove | 12 mm | 13 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N64 | 00000 | ||
| 2 | 32 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N61 | 00000 | ||
| 2 | 32 | O-Ring Groove | 12 mm | 13 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N65 | 00000 | ||
Machined Flange Adapters
SAE High-Pressure Iron and Steel Threaded Pipe Flanges
Machined Flanges
Dash Size | Bolt Hole | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size (A) | Thread Size (A) | SAE Pipe Flange Size (B) | (A) | (B) | Flanged Connection Surface (B) | For Bolt Dia. | Dia. | No. Of | Material | Max. Pressure @ Temp. | Each | |||
NPTF Female | ||||||||||||||
| 3/4 | — | 3/4 | 12 | 12 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N14 | 000000 | ||
| 1 | — | 1 | 16 | 16 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N15 | 00000 | ||
| 1 | — | 1 | 16 | 16 | O-Ring Groove | 10 mm | 10.5 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N19 | 00000 | ||
| 1 1/2 | — | 1 1/2 | 24 | 24 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N16 | 00000 | ||
| 2 | — | 2 | 32 | 32 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N17 | 00000 | ||
| 2 | — | 2 | 32 | 32 | O-Ring Groove | 12 mm | 13.3 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N21 | 00000 | ||
UN/UNF (SAE Straight) Female | ||||||||||||||
| — | 1 5/16"-12 | 1 | 16 | 16 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 3,000 psi @ 72° F | 2125N27 | 00000 | ||
| — | 1 7/8"-12 | 1 1/2 | 24 | 24 | O-Ring Groove | 12 mm | 13 mm | 4 | Steel | 3,000 psi @ 72° F | 2125N32 | 00000 | ||
| — | 1 7/8"-12 | 2 | 24 | 32 | O-Ring Groove | 1/2" | 0.53" | 4 | Steel | 3,000 psi @ 72° F | 2125N29 | 00000 | ||
Easy-Access CPVC Pipe Flanges for Chemicals
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. | Material | Color | Max. Pressure @ Temp. | Each | |||
Grooved-End Clamp-On Male | ||||||||||||||
| 2 | 2 | Raised | 6" | 5/8" | 3/4" | 4 | 4 3/4" | CPVC | Light Gray | 150 psi @ 72° F | 2663N21 | 0000000 | ||
| 3 | 3 | Raised | 7 1/2" | 5/8" | 3/4" | 4 | 6" | CPVC | Light Gray | 150 psi @ 72° F | 2663N22 | 000000 | ||
| 4 | 4 | Raised | 9" | 5/8" | 3/4" | 8 | 7 1/2" | CPVC | Light Gray | 150 psi @ 72° F | 2663N23 | 000000 | ||
SAE Extreme-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges
Forged Flanges
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Flange |
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
SAE Pipe Flange Size | Dash Size | Flanged Connection Surface | For Bolt Dia. | Dia. | No. Of | Material | Max. Pressure @ Temp. | Each | |||
Flanged | |||||||||||
| 3/4 | 12 | O-Ring Groove | 3/8" | 0.41" | 4 | Steel | 6,000 psi @ 72° F | 2125N66 | 000000 | ||
| 3/4 | 12 | O-Ring Groove | 10 mm | 11 mm | 4 | Steel | 6,000 psi @ 72° F | 2125N71 | 00000 | ||
| 1 | 16 | O-Ring Groove | 0.438" | 0.47" | 4 | Steel | 6,000 psi @ 72° F | 2125N67 | 00000 | ||
| 1 | 16 | O-Ring Groove | 12 mm | 13 mm | 4 | Steel | 6,000 psi @ 72° F | 2125N72 | 00000 | ||
| 1 1/2 | 24 | O-Ring Groove | 5/8" | 0.66" | 4 | Steel | 6,000 psi @ 72° F | 2125N68 | 00000 | ||
| 1 1/2 | 24 | O-Ring Groove | 16 mm | 17 mm | 4 | Steel | 6,000 psi @ 72° F | 2125N7 | 00000 | ||
| 2 | 32 | O-Ring Groove | 3/4" | 0.78" | 4 | Steel | 6,000 psi @ 72° F | 2125N69 | 000000 | ||
| 2 | 32 | O-Ring Groove | 20 mm | 21 mm | 4 | Steel | 6,000 psi @ 72° F | 2125N73 | 000000 | ||
Machined Flange Adapters
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Flange |
Pipe Size (A) | For SAE Pipe Flange Size (B) | Dash Size (A) | For Flanged Connection Surface | Material | Max. Pressure @ Temp. | Each | |||
|---|---|---|---|---|---|---|---|---|---|
NPTF Female | |||||||||
| 3/4 | 3/4 | 12 | O-Ring Groove | Steel | 6,000 psi @ 72° F | 2125N86 | 000000 | ||
| 1 | 1 | 16 | O-Ring Groove | Steel | 6,000 psi @ 72° F | 2125N87 | 00000 | ||
| 1 1/2 | 1 1/2 | 24 | O-Ring Groove | Steel | 6,000 psi @ 72° F | 2125N88 | 000000 | ||
| 2 | 2 | 32 | O-Ring Groove | Steel | 6,000 psi @ 72° F | 2125N89 | 000000 | ||











































