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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About Conduit
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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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About Nuts, Materials, and Finishes
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Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line.
Fittings that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration. Locknuts that meet DIN 431 comply with international standards for pipe fitting locknut dimensions.
NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
Locknuts
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Class:
NPSL: 150 - Fabrication:
NPSL: Heat Treated - Specifications Met:
NPSL: ANSI/MSS SP-114, ASTM A351
BSPP: DIN 431 - Pipe Nipples and Pipe:
NPSL: Use Schedule 40 stainless steel - Flanges:
NPSL: Use Class 150 stainless steel
304 Stainless Steel | 316 Stainless Steel | |||||
|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPSL Female | ||||||
| 1/8 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 1 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 1 1/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 3 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
BSPP Female | ||||||
| 1/8 | Not Rated | Not Rated | 00000000 | 0000 | 000000 | 00 |
| 1/4 | Not Rated | Not Rated | 00000000 | 0000 | 000000 | 00 |
| 3/8 | Not Rated | Not Rated | 00000000 | 0000 | 000000 | 00 |
| 1/2 | Not Rated | Not Rated | 00000000 | 0000 | 000000 | 00 |
| 5/8 | Not Rated | Not Rated | 00000000 | 0000 | 000000 | 00 |
| 3/4 | Not Rated | Not Rated | 00000000 | 0000 | 000000 | 00 |
| 1 | Not Rated | Not Rated | 00000000 | 00000 | 000000 | 00 |
Extreme-Pressure Stainless Steel Threaded Pipe Fittings
With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines.
303 stainless steel fittings have very good corrosion resistance.
Locknuts have a gasket, which creates a tight seal without the need for PTFE tape; screw one onto the male end of a fitting for extra holding power.
For technical drawings and 3-D models, click on a part number.
Locknuts
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Water
- Temperature Range: -300° to 500° F
303 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Hex Wd. | Lg. | Gasket Material | Max. Pressure | Each | |
NPT Female | |||||||
| 1/8 | 02 | 5/8" | 3/16" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 000000 |
| 1/4 | 04 | 3/4" | 9/32" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 00000 |
| 3/8 | 06 | 7/8" | 9/32" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 08 | 1 1/8" | 19/64" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 12 | 1 5/16" | 19/64" | PTFE Plastic | 5,000 psi @ 72° F | 0000000 | 00000 |
| 1 | 16 | 1 5/8" | 25/64" | PTFE Plastic | 5,000 psi @ 72° F | 0000000 | 000000 |
| 1 1/4 | 20 | 2" | 25/64" | PTFE Plastic | 5,000 psi @ 72° F | 0000000 | 000000 |
| 1 1/2 | 24 | 2 1/4" | 25/64" | PTFE Plastic | 3,000 psi @ 72° F | 0000000 | 000000 |
| 2 | 32 | 2 3/4" | 27/64" | PTFE Plastic | 3,000 psi @ 72° F | 0000000 | 000000 |
Locknuts for Metal Conduit Fittings
Zinc-Plated Steel, 304 Stainless
Steel, 316 Stainless Steel,
Aluminum, and Brass
Steel, 316 Stainless Steel,
Aluminum, and Brass
Secure threaded metal conduit fittings to a knockout in an outlet box or enclosure.
Zinc-plated steel, 316 stainless steel, and aluminum locknuts are compatible with NPT and NPSM threads.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Specifications Met | Each | |
304 Stainless Steel | |||
|---|---|---|---|
PG Threads | |||
| PG-7 | DIN EN 1.4305 | 00000000 | 00000 |
| PG-9 | DIN EN 1.4305 | 00000000 | 0000 |
| PG-11 | DIN EN 1.4305 | 00000000 | 00000 |
| PG-13 | DIN EN 1.4305 | 00000000 | 00000 |
| PG-16 | DIN EN 1.4305 | 00000000 | 00000 |
| PG-21 | DIN EN 1.4305 | 00000000 | 00000 |
| PG-29 | DIN EN 1.4305 | 00000000 | 00000 |
| PG-36 | DIN EN 1.4305 | 00000000 | 00000 |
Metric Threads | |||
| M8 | DIN EN 1.4305 | 00000000 | 0000 |
| M10 | DIN EN 1.4305 | 00000000 | 0000 |
| M12 | DIN EN 1.4305 | 00000000 | 0000 |
| M16 | DIN EN 1.4305 | 00000000 | 0000 |
| M20 | DIN EN 1.4305 | 00000000 | 00000 |
| M25 | DIN EN 1.4305 | 00000000 | 00000 |
| M32 | DIN EN 1.4305 | 00000000 | 00000 |
| M40 | DIN EN 1.4305 | 00000000 | 00000 |
| M50 | DIN EN 1.4305 | 00000000 | 00000 |
316 Stainless Steel | |||
NPSM Threads | |||
| 1/2 | UL Listed, C-UL Listed | 00000000 | 0000 |
| 3/4 | UL Listed, C-UL Listed | 00000000 | 0000 |
| 1 | UL Listed, C-UL Listed | 00000000 | 0000 |
| 1 1/4 | UL Listed, C-UL Listed | 00000000 | 00000 |
| 1 1/2 | UL Listed, C-UL Listed | 00000000 | 00000 |
| 2 | UL Listed, C-UL Listed | 00000000 | 00000 |
| 2 1/2 | UL Listed, C-UL Listed | 00000000 | 00000 |
| 3 | UL Listed, C-UL Listed | 00000000 | 00000 |
| 4 | UL Listed, C-UL Listed | 00000000 | 00000 |
Stainless Steel Hex Panel Nuts
All of these stainless steel panel nuts have some chemical resistance. They can be fastened with a wrench for more torque while tightening than knurled panel nuts. Also known as dress nuts, they are extremely thin for use in tight spaces such as electrical panels.
18-8 stainless steel nuts have good chemical resistance. They may be mildly magnetic. Those with a black-oxide finish have a dark surface color.
316 stainless steel nuts have excellent chemical resistance and can be used in saltwater environments.
For technical drawings and 3-D models, click on a part number.
NPSM Threads
| Pipe Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||
|---|---|---|---|---|---|
| 1/8 | 9/16" | 1/8" | 1 | 000000000 | 00000 |
| 1/8 | 5/8" | 1/8" | 1 | 000000000 | 0000 |
| 1/8 | 5/8" | 3/16" | 1 | 000000000 | 0000 |
| 1/4 | 11/16" | 1/4" | 1 | 000000000 | 0000 |
| 1/4 | 11/16" | 17/64" | 1 | 000000000 | 0000 |
| 1/4 | 11/16" | 9/32" | 1 | 000000000 | 0000 |
| 3/8 | 13/16" | 17/64" | 1 | 000000000 | 0000 |
| 3/8 | 13/16" | 9/32" | 1 | 000000000 | 0000 |
| 3/8 | 13/16" | 19/64" | 1 | 000000000 | 0000 |
| 1/2 | 1" | 21/64" | 1 | 000000000 | 0000 |
| 1/2 | 1" | 11/32" | 1 | 000000000 | 00000 |
| 1/2 | 1" | 23/64" | 1 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | |||||
| 1/8 | 9/16" | 1/8" | 1 | 000000000 | 0000 |
| 1/8 | 5/8" | 1/8" | 1 | 000000000 | 0000 |
| 1/8 | 5/8" | 3/16" | 1 | 000000000 | 0000 |
| 1/4 | 11/16" | 1/4" | 1 | 000000000 | 0000 |
| 1/4 | 11/16" | 17/64" | 1 | 000000000 | 0000 |
| 1/4 | 11/16" | 9/32" | 1 | 000000000 | 00000 |
| 3/8 | 13/16" | 17/64" | 1 | 000000000 | 0000 |
| 3/8 | 13/16" | 9/32" | 1 | 000000000 | 0000 |
| 3/8 | 13/16" | 19/64" | 1 | 000000000 | 00000 |
| 1/2 | 1" | 21/64" | 1 | 000000000 | 00000 |
| 1/2 | 1" | 11/32" | 1 | 000000000 | 00000 |
| 1/2 | 1" | 23/64" | 1 | 000000000 | 00000 |
316 Stainless Steel | |||||
| 1/8 | 9/16" | 1/8" | 1 | 000000000 | 0000 |
| 1/8 | 5/8" | 1/8" | 1 | 000000000 | 0000 |
| 1/8 | 5/8" | 3/16" | 1 | 000000000 | 0000 |
| 1/4 | 11/16" | 1/4" | 1 | 000000000 | 00000 |
| 1/4 | 11/16" | 17/64" | 1 | 000000000 | 00000 |
| 1/4 | 11/16" | 9/32" | 1 | 000000000 | 00000 |
| 3/8 | 13/16" | 17/64" | 1 | 000000000 | 00000 |
| 3/8 | 13/16" | 9/32" | 1 | 000000000 | 00000 |
| 3/8 | 13/16" | 19/64" | 1 | 000000000 | 00000 |
| 1/2 | 1" | 21/64" | 1 | 000000000 | 00000 |
| 1/2 | 1" | 11/32" | 1 | 000000000 | 00000 |
| 1/2 | 1" | 23/64" | 1 | 000000000 | 00000 |
UNEF Threads
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||
|---|---|---|---|---|---|
| 1/4"-32 | 5/16" | 5/64" | 10 | 000000000 | 000000 |
| 1/4"-32 | 3/8" | 3/32" | 10 | 000000000 | 0000 |
| 1/4"-32 | 7/16" | 7/32" | 1 | 000000000 | 0000 |
| 5/16"-32 | 3/8" | 3/32" | 1 | 000000000 | 0000 |
| 5/16"-32 | 7/16" | 7/64" | 10 | 000000000 | 00000 |
| 5/16"-32 | 1/2" | 17/64" | 1 | 000000000 | 0000 |
| 3/8"-32 | 1/2" | 3/32" | 1 | 000000000 | 0000 |
| 3/8"-32 | 9/16" | 21/64" | 1 | 000000000 | 0000 |
| 3/8"-32 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 3/8"-32 | 5/8" | 1/2" | 1 | 000000000 | 0000 |
| 3/8"-32 | 5/8" | 9/16" | 1 | 000000000 | 0000 |
| 7/16"-28 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 7/16"-28 | 11/16" | 3/8" | 1 | 000000000 | 0000 |
| 15/32"-32 | 9/16" | 5/64" | 1 | 000000000 | 0000 |
| 15/32"-32 | 9/16" | 3/32" | 1 | 000000000 | 0000 |
| 15/32"-32 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 15/32"-32 | 5/8" | 9/16" | 1 | 000000000 | 0000 |
| 1/2"-28 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 1/2"-28 | 5/8" | 1/8" | 1 | 000000000 | 0000 |
| 1/2"-28 | 3/4" | 3/8" | 1 | 000000000 | 00000 |
| 5/8"-24 | 15/16" | 3/8" | 1 | 000000000 | 00000 |
| 11/16"-24 | 1" | 27/64" | 1 | 000000000 | 00000 |
| 3/4"-20 | 1" | 27/64" | 1 | 000000000 | 00000 |
| 7/8"-20 | 1 5/16" | 31/64" | 1 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | |||||
| 1/4"-32 | 5/16" | 5/64" | 5 | 000000000 | 0000 |
| 1/4"-32 | 3/8" | 3/32" | 5 | 000000000 | 0000 |
| 1/4"-32 | 7/16" | 7/32" | 1 | 000000000 | 0000 |
| 5/16"-32 | 3/8" | 3/32" | 1 | 000000000 | 0000 |
| 5/16"-32 | 7/16" | 7/64" | 5 | 000000000 | 00000 |
| 5/16"-32 | 1/2" | 17/64" | 1 | 000000000 | 0000 |
| 3/8"-32 | 1/2" | 3/32" | 1 | 000000000 | 0000 |
| 3/8"-32 | 9/16" | 21/64" | 1 | 000000000 | 0000 |
| 3/8"-32 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 3/8"-32 | 5/8" | 1/2" | 1 | 000000000 | 00000 |
| 3/8"-32 | 5/8" | 9/16" | 1 | 000000000 | 00000 |
| 7/16"-28 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 7/16"-28 | 11/16" | 3/8" | 1 | 000000000 | 0000 |
| 15/32"-32 | 9/16" | 5/64" | 1 | 000000000 | 0000 |
| 15/32"-32 | 9/16" | 3/32" | 1 | 000000000 | 0000 |
| 15/32"-32 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 15/32"-32 | 5/8" | 9/16" | 1 | 000000000 | 0000 |
| 1/2"-28 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 1/2"-28 | 5/8" | 1/8" | 1 | 000000000 | 0000 |
| 1/2"-28 | 3/4" | 3/8" | 1 | 000000000 | 0000 |
| 5/8"-24 | 15/16" | 3/8" | 1 | 000000000 | 0000 |
| 11/16"-24 | 1" | 27/64" | 1 | 000000000 | 00000 |
| 3/4"-20 | 1" | 27/64" | 1 | 000000000 | 0000 |
| 7/8"-20 | 1 5/16" | 31/64" | 1 | 000000000 | 00000 |
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
316 Stainless Steel | |||||
|---|---|---|---|---|---|
| 1/4"-32 | 5/16" | 5/64" | 1 | 000000000 | 00000 |
| 1/4"-32 | 3/8" | 3/32" | 1 | 000000000 | 0000 |
| 1/4"-32 | 7/16" | 7/32" | 1 | 000000000 | 00000 |
| 5/16"-32 | 3/8" | 3/32" | 1 | 000000000 | 0000 |
| 5/16"-32 | 7/16" | 7/64" | 1 | 000000000 | 0000 |
| 5/16"-32 | 1/2" | 17/64" | 1 | 000000000 | 00000 |
| 3/8"-32 | 1/2" | 3/32" | 1 | 000000000 | 00000 |
| 3/8"-32 | 9/16" | 21/64" | 1 | 000000000 | 00000 |
| 3/8"-32 | 5/8" | 3/32" | 1 | 000000000 | 00000 |
| 3/8"-32 | 5/8" | 1/2" | 1 | 000000000 | 00000 |
| 3/8"-32 | 5/8" | 9/16" | 1 | 000000000 | 00000 |
| 7/16"-28 | 5/8" | 3/32" | 1 | 000000000 | 00000 |
| 7/16"-28 | 11/16" | 3/8" | 1 | 000000000 | 00000 |
| 15/32"-32 | 9/16" | 5/64" | 1 | 000000000 | 00000 |
| 15/32"-32 | 9/16" | 3/32" | 1 | 000000000 | 00000 |
| 15/32"-32 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 15/32"-32 | 5/8" | 9/16" | 1 | 000000000 | 00000 |
| 1/2"-28 | 5/8" | 3/32" | 1 | 000000000 | 00000 |
| 1/2"-28 | 5/8" | 1/8" | 1 | 000000000 | 00000 |
| 1/2"-28 | 3/4" | 3/8" | 1 | 000000000 | 00000 |
| 5/8"-24 | 15/16" | 3/8" | 1 | 000000000 | 00000 |
| 11/16"-24 | 1" | 27/64" | 1 | 000000000 | 00000 |
| 3/4"-20 | 1" | 27/64" | 1 | 000000000 | 00000 |
| 7/8"-20 | 1 5/16" | 31/64" | 1 | 000000000 | 00000 |
UNS Threads
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||
|---|---|---|---|---|---|
| 1/4"-40 | 5/16" | 1/16" | 1 | 000000000 | 00000 |
| 1/4"-40 | 5/8" | 3/16" | 1 | 000000000 | 0000 |
| 5/8"-27 | 3/4" | 1/8" | 1 | 000000000 | 0000 |
Black-Oxide 18-8 Stainless Steel | |||||
| 1/4"-40 | 5/16" | 1/16" | 1 | 000000000 | 0000 |
| 1/4"-40 | 5/8" | 3/16" | 1 | 000000000 | 0000 |
| 5/8"-27 | 3/4" | 1/8" | 1 | 000000000 | 0000 |
316 Stainless Steel | |||||
| 1/4"-40 | 5/16" | 1/16" | 1 | 000000000 | 00000 |
| 1/4"-40 | 5/8" | 3/16" | 1 | 000000000 | 0000 |
| 5/8"-27 | 3/4" | 1/8" | 1 | 000000000 | 0000 |