How to Measure Threaded Pipe Size
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How to Install Key-Locking Inserts
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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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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. 316 stainless steel fittings have excellent corrosion resistance. BSPP and metric male threads have either a gasket or a gasket and washer to prevent leaks.
For technical drawings and 3-D models, click on a part number.
Male Threads with
Gasket and Washer
- Specifications Met: See table
- For Use With: See table
316 Stainless Steel | |||||||
---|---|---|---|---|---|---|---|
Pipe Size (A) | Dash Size (A) | Thread Size (B) | Max. Pressure | For Use With | Specifications Met | Each | |
NPT Female × Metric Male | |||||||
1/2 | 08 | M20 × 1.5 mm | 3,500 psi @ 72° F | Hydraulic Fluid, Oil, Water | ASME B1.20.3, DIN 7631, ISO 9974 | 00000000 | 000000 |
Male Threads with
Gasket and Washer
- For Use With: See table
- Specifications Met: See table
316 Stainless Steel | |||||||
---|---|---|---|---|---|---|---|
Pipe Size (A) | Dash Size (A) | Thread Size (B) | Max. Pressure | For Use With | Specifications Met | Each | |
BSPP Male × Metric Male | |||||||
3/8 | 06 | M20 × 1.5 mm | 5,000 psi @ 72° F | Hydraulic Fluid, Oil, Water | DIN 7631, ISO 1179, ISO 8434-6, ISO 9974 | 00000000 | 000000 |
1/2 | 08 | M20 × 1.5 mm | 4,500 psi @ 72° F | Hydraulic Fluid, Oil, Water | DIN 7631, ISO 1179, ISO 8434-6, ISO 9974 | 00000000 | 00000 |
High-Pressure Plated Brass Threaded Pipe Fittings
The plating on these brass fittings creates a shiny finish and provides extra protection in corrosive environments. Fittings have the strength to handle high-pressure applications.
Nickel-plated brass fittings provide better corrosion resistance than unplated brass fittings.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through a wall or panel to create an inlet or outlet.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water
Nickel-Plated Brass | |||||
---|---|---|---|---|---|
Pipe Size | Thread Size | For Max. Wall Thick. | Max. Pressure | Each | |
BSPP Female × Metric Male | |||||
1/4 | M20 × 1.5 mm | 0.63" | 1,450 psi @ 72° F | 00000000 | 00000 |
Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized and zinc-plated steel, which have better corrosion resistance than plain steel fittings. BSPP and metric male threads have either a gasket, or a gasket and washer, to prevent leaks.
For technical drawings and 3-D models, click on a part number.
- For Use With:
NPTF: Air, Hydraulic Fluid, Water
Metric: Air, Hydraulic Fluid, Oil, Water - Specifications Met:
NPTF: ASTM A108
Metric: DIN 7631, ISO 6149, ISO 9974
Thread Size | Max. Pressure | Material | Each | |
Metric Female | ||||
---|---|---|---|---|
M20 × 1.5 mm | 3,500 psi @ 72° F | Galvanized Steel | 00000000 | 000000 |
Male Threads with
Gasket and Washer
- For Use With: See table
- Specifications Met: See table
Pipe Size (A) | Thread Size (A) | Dash Size (A) | Pipe Size (B) | Thread Size (B) | Dash Size (B) | Max. Pressure | Material | For Use With | Specifications Met | Each | |
NPT Female × Metric Male | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1/2 | __ | 08 | __ | M20 × 1.5 mm | __ | 3,500 psi @ 72° F | Galvanized Steel | Air, Hydraulic Fluid, Oil, Water | ASME B1.20.3, DIN 7631, ISO 6149, ISO 9974 | 00000000 | 000000 |
Metric Female × NPT Male | |||||||||||
__ | M20 × 1.5 mm | __ | 1/2 | __ | 08 | 4,500 psi @ 72° F | Galvanized Steel | Air, Hydraulic Fluid, Oil, Water | ASME B1.20.3, DIN 7631, ISO 6149, ISO 9974 | 00000000 | 00000 |
(SAE Straight) Male
Threads with Gasket and Washer
- For Use With: See table
- Specifications Met: See table
Pipe Size (A) | Dash Size (A) | Thread Size (B) | Max. Pressure | Material | For Use With | Specifications Met | Each | |
BSPP Male × Metric Male | ||||||||
---|---|---|---|---|---|---|---|---|
3/8 | 06 | M20 × 1.5 mm | 4,500 psi @ 72° F | Galvanized Steel | Air, Hydraulic Fluid, Oil, Water | DIN 7631, ISO 1179, ISO 6149, ISO 8434-6, ISO 9974 | 0000000 | 000000 |
1/2 | 08 | M20 × 1.5 mm | 4,500 psi @ 72° F | Galvanized Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Oil, Water | DIN 7631, ISO 1179, ISO 6149, ISO 8434-6, ISO 9974 | 00000000 | 00000 |
Plastic Pipe Fittings for Oil
Made of corrosion-resistant plastic, these fittings won’t deteriorate when used in oil applications. They also have high strength and impact resistance. Apply a non-hardening, plastic-compatible sealant to the male threads to prevent leaks. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
- For Use With: Oil
- Temperature Range: 0° to 230° F
Thread Size | Thread Direction | Material | Color | Maximum Pressure | Each | |
Metric Threads | ||||||
---|---|---|---|---|---|---|
M20 × 1.5 mm | Right Hand | Nylon Plastic | Blue | 200 psi @ 72° F | 00000000 | 00000 |
Low-Profile Hex Manifolds
When you’re short on vertical space, these manifolds are a good fit—they have outlets on the side instead of on top, so they have a lower profile than rectangular manifolds. Use them to distribute air, water, or hydraulic fluid to five locations from a single supply source. Manifolds have mounting holes, so you can mount from the top.
Anodized aluminum manifolds are the industry standard for the most common types of applications. They are lighter in weight than other metal manifolds and have good corrosion resistance. These manifolds are anodized for a black finish.
316 stainless steel manifolds have excellent corrosion resistance and can handle fuel, gasoline, coolant and other harsh substances.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water, Hydraulic Fluid
- Temperature Range: -10° to 200° F
- Maximum Pressure: 1,000 psi @ 72° F
- Maximum Vacuum: 27 in. of Hg @ 72° F
- For Use With: Air, Water, Hydraulic Fluid, Alcohol, Coolant, Cutting Oil, Deionized Water, Diesel Fuel, Fuel Oil, Gasoline, Mineral Oil, Nitrogen
- Temperature Range: -100° to 500° F
- Maximum Pressure: 3,500 psi @ 72° F
- Maximum Vacuum: 27 in. of Hg @ 72° F
37° Flared Fittings for Steel Tubing
- Tubing: Use with seamless steel
- Specifications Met: SAE J514
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately. Fittings are zinc-plated steel for fair corrosion resistance.
To prevent leaks, UN/UNF (SAE Straight) male threads have a gasket. Metric and BSPP male threads have either a gasket or a gasket and washer.
For technical drawings and 3-D models, click on a part number.
- For Use With: See Table
- Temperature Range: See Table
For Tube OD | Thread Size | Thread Pitch, mm | For Use With | Material | Gasket Material | Max. Pressure | Temp. Range, °F | Each | |
Metric Threads | |||||||||
---|---|---|---|---|---|---|---|---|---|
5/8" | M20 | 1.5 | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Zinc-Plated Steel | Buna-N Rubber | 2,300 psi @ 72° F | -30° to 200° | 00000000 | 000000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. Sleeves are zinc-plated steel for fair corrosion resistance. They are also known as ferrules.
Inch × metric sleeve adapters convert the fitting from inch to metric.
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
For Tube OD | Nut Material | Max. Pressure | Each | |
5/8" | Zinc-Plated Steel | 3,000 psi @ 72° F | 000000000 | 00000 |
Metal Barbed Hose Fittings for Air and Water
Slide the barbed end into rubber hose and secure with the appropriate clamp or crimp-on hose ferrule.
Brass fittings are softer than other metal fittings, so they’re easier to thread together. Plain brass fittings have good corrosion resistance.Aluminum fittings are lighter in weight than other metal fittings. They have good corrosion resistance.
Fittings with a threaded end are also known as hose nipples.
Metric, UN/UNF (SAE Straight), and BSPP male threads with gasket protect against leaks.
For technical drawings and 3-D models, click on a part number.
UN/UNF (SAE Straight)
Male Threads with Gasket
- Maximum Pressure: See table
- Maximum Vacuum: 27 in. of Hg @ 72° F
- Temperature Range: See table
- Attachment Type: See table
- Specifications Met: See table
For Hose ID | Thread Size | Gasket Material | Max. Pressure | Temperature Range, °F | Attachment Type | Pkg. Qty. | Pkg. | |
Brass | ||||||||
---|---|---|---|---|---|---|---|---|
3/4" | M20 × 1.5 mm | Buna-N Rubber | 300 psi @ 72° F | -30° to 200° | Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule | 1 | 00000000 | 000000 |
19mm | M20 × 1.5 mm | Buna-N Rubber | 250 psi @ 72° F | -30° to 200° | Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule | 1 | 00000000 | 00000 |
Aluminum | ||||||||
3/4" | M20 × 1.5 mm | Buna-N Rubber | 125 psi @ 72° F | -30° to 200° | Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule | 1 | 00000000 | 00000 |
19mm | M20 × 1.5 mm | Buna-N Rubber | 125 psi @ 72° F | -30° to 200° | Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule | 1 | 00000000 | 00000 |
Black-Phosphate Steel Easy-to-Install Thread-Locking Inserts
A black-phosphate finish provides mild corrosion resistance. Also known as E-Z Lok, these inserts use Loctite® adhesive to keep them in place. The adhesive reaches full strength after 72 hours. Installation requires a drill bit and a standard tap. Then set the insert with a bolt and two nuts, or use an installation bit.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
To drive slotted inserts, you can use a slotted screwdriver instead of using an installation bit or a bolt and two nuts.
For technical drawings and 3-D models, click on a part number.
18-8 Stainless Steel Key-Locking Inserts
Made of stainless steel, these inserts have good corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
Inserts | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Tap | Each | Installation Tools | |||||||||||
Thread Size | Thread Pitch, mm | Thread Spacing | Thread Size | Thread Pitch, mm | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | 1-9 | 10-Up | Each | ||
18-8 Stainless Steel with Thick Wall | |||||||||||||
M20 | 2.5 | Coarse | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 000000000 | 000000 | 000000 | 000000000 | 000000 |
M20 | 1.5 | Extra Fine | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 000000000 | 00000 | 00000 | 000000000 | 00000 |
Black-Phosphate Steel Key-Locking Inserts
A black-phosphate finish provides mild corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole with stripped threads.
For technical drawings and 3-D models, click on a part number.
Inserts | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Tap | Each | Installation Tools | |||||||||||
Thread Size | Thread Pitch, mm | Thread Spacing | Thread Size | Thread Pitch, mm | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | 1-9 | 10-Up | Each | ||
Black-Phosphate Steel with Thick Wall | |||||||||||||
M20 | 2.5 | Coarse | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 000000000 | 000000 | 000000 | 000000000 | 000000 |
M20 | 1.5 | Extra Fine | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 000000000 | 00000 | 00000 | 000000000 | 00000 |
Key-Locking Inserts with Installation Tool
Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. These inserts are used to repair or convert threads in soft metals such as aluminum. They’re comparable to Keensert® inserts.
18-8 stainless steel inserts are more corrosion resistant than black-phosphate steel. They may be mildly magnetic.
Black-phosphate steel inserts are mildly corrosion resistant.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
For Tap | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Pitch, mm | Thread Spacing | Thread Size | Thread Pitch, mm | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | No. of Inserts Included | Each | |
18-8 Stainless Steel with Thick Wall | |||||||||||
M20 | 2.5 | Coarse | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 3 | 000000000 | 0000000 |
M20 | 1.5 | Extra Fine | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 3 | 000000000 | 000000 |
Black-Phosphate Steel with Thick Wall | |||||||||||
M20 | 2.5 | Coarse | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 3 | 000000000 | 00000 |
M20 | 1.5 | Extra Fine | M30 | 2 | 30mm | 28 mm | 28mm | 4 | 3 | 000000000 | 00000 |
Conduit and Cord Grip Thread Adapters
Adapt metric, NPT, and PG conduit and cord grip threads to match knockout threads. A rubber O-ring seals out moisture.
Nylon adapters are lightweight and chemical resistant.
For technical drawings and 3-D models, click on a part number.
Conduit and Cord Grip Connection | Electrical Box Connection | Nickel-Plated Brass | Nylon Plastic | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Pipe Size | Thread Type | Gender | Thread Size | Thread Type | Gender | Each | Each | ||
NPT × Metric | ||||||||||
__ | 1/2 | NPT | Female | M20 | Metric | Male | 000000 | 000000 | 0000000 | 00000 |
Metric × PG | ||||||||||
M20 | __ | Metric | Female | PG-11 | PG | Male | 0000000 | 0000 | 000000 | 00 |
M20 | __ | Metric | Female | PG-13.5 | PG | Male | 0000000 | 0000 | 000000 | 00 |
M20 | __ | Metric | Female | PG-16 | PG | Male | 000000 | 00 | 0000000 | 00000 |
PG × Metric | ||||||||||
PG-11 | __ | PG | Female | M20 | Metric | Male | 0000000 | 0000 | 000000 | 00 |
PG-13.5 | __ | PG | Female | M20 | Metric | Male | 0000000 | 0000 | 000000 | 00 |
PG-16 | __ | PG | Female | M20 | Metric | Male | 0000000 | 0000 | 000000 | 00 |
Adapters for Flexible Plastic Conduit
Tabs on one end snap into grooves in conduit; the other end attaches to a knockout in an outlet box or enclosure. These adapters help seal out air and liquid when used with flexible plastic conduit. All meet IP68 for prolonged submersion and IP69K for high-pressure, high-temperature washdowns. They withstand vibration, are flame retardant, and resist oil, solvents, and UV light.
For technical drawings and 3-D models, click on a part number.
Conduit Connection | Electrical Box Connection | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Conduit Trade Size | Conduit Connection Type | Gender | Thread Size | Thread Type | Gender | Material | Color | Temperature Range, °F | Environmental Rating | Specifications Met | Each | |
Metric | ||||||||||||
1/2 | Snap-In | Female | M20 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL 94 V-0, UL Recognized Component | 0000000 | 00000 |
Conduit Connection | Electrical Box Connection | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Conduit Trade Size | Conduit Connection Type | Gender | Thread Size | Thread Type | Gender | Material | Color | Temperature Range, °F | Environmental Rating | Specifications Met | Each | |
Metric | ||||||||||||
3/8 | Snap-In | Female | M20 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL Recognized Component, UL 94 V-0 | 0000000 | 000000 |
1/2 | Snap-In | Female | M20 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL Recognized Component, UL 94 V-0 | 0000000 | 00000 |
Conduit Connection | Electrical Box Connection | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Conduit Trade Size | Conduit Connection Type | Gender | Thread Size | Thread Type | Gender | Material | Color | Temperature Range, °F | Environmental Rating | Specifications Met | Each | |
Metric | ||||||||||||
1/2 | Snap-In | Female | M20 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL Recognized Component, UL 94 V-0 | 0000000 | 000000 |
Conduit Connection | Electrical Box Connection | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Conduit Trade Size | Conduit Connection Type | Gender | Thread Size | Thread Type | Gender | Material | Color | Temperature Range, °F | Environmental Rating | Specifications Met | Each | |
Metric | ||||||||||||
3/8 | Snap-In | Female | M20 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL Recognized Component, UL 94 V-0 | 0000000 | 000000 |
1/2 | Snap-In | Female | M20 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL Recognized Component, UL 94 V-0 | 0000000 | 00000 |
Fittings for Shielded Flexible Plastic Conduit
These adapters provide electromagnetic interference (EMI) protection when connecting shielded flexible plastic conduit to a knockout in an outlet box or enclosure. Twist the compression end over the conduit; tighten the compression ring to secure.
A brass locknut is required (not included) when installing in an unthreaded knockout.
For technical drawings and 3-D models, click on a part number.
Metric High-Capacity Leveling Mount Inserts for Tubular Legs
Rated for high load capacity, use these inserts to connect threaded leveling mounts to machinery, instrument bases, and conveyor equipment with tubular legs. These inserts have pass-through holes that are partially threaded at the base. Tap mounts into place with a rubber hammer.
For technical drawings and 3-D models, click on a part number.