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.
Through-wall fittings are also known as bulkhead couplings; they mount through your wall to create an inlet or outlet. When installing, the gasket should be on the inside of the wall. BSPP and metric male threads have either a gasket or a gasket and washer to prevent leaks.
- For Use With: Hydraulic Fluid, Oil, Water
- Specifications Met: ISO 1179, ISO 8434-6
316 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
Pipe Size | Dash Size | For Max. Wall Thick., mm | Lg., mm | Max. Pressure | Each | |
BSPP Male | ||||||
| 1/8 | 02 | 8 | 43 | 5,000 psi @ 72° F | 00000000 | 000000 |
| 1/4 | 04 | 8 | 46 | 5,000 psi @ 72° F | 00000000 | 00000 |
| 3/8 | 06 | 8 | 55 | 5,000 psi @ 72° F | 00000000 | 00000 |
| 1/2 | 08 | 8 | 59 | 4,500 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 12 | 8 | 64 | 3,600 psi @ 72° F | 00000000 | 000000 |
| 1 | 16 | 8 | 75 | 2,900 psi @ 72° F | 00000000 | 000000 |
- Temperature Range: -22° to 230° F
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 zinc-plated steel, which have better corrosion resistance than plain steel fittings.
Through-wall fittings are also known as bulkhead couplings; they mount through your wall to create an inlet or outlet. When installing, the gasket should be on the inside of the wall. BSPP and metric male threads have either a gasket, or a gasket and washer, to prevent leaks.
Threads with
Gasket and Washer
- For Use With: Air, Hydraulic Fluid, Oil, Water
- Specifications Met: ISO 1179, ISO 8434-6
| Pipe Size | Dash Size | For Hole Dia., mm | For Max. Wall Thick., mm | Max. Pressure | Material | Washer Material | Each | |
BSPP Male | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4 | 04 | 13 | 11.5 | 6,500 psi @ 72° F | Zinc Plated Steel | Steel | 00000000 | 00000 |
| 3/8 | 06 | 16.5 | 13.9 | 5,500 psi @ 72° F | Zinc Plated Steel | Steel | 00000000 | 00000 |
| 1/2 | 08 | 20.8 | 12.7 | 4,500 psi @ 72° F | Zinc Plated Steel | Steel | 00000000 | 00000 |
| 3/4 | 12 | 26.3 | 11.5 | 3,500 psi @ 72° F | Zinc Plated Steel | Steel | 00000000 | 00000 |
| 1 | 16 | 33.1 | 12.7 | 3,000 psi @ 72° F | Zinc Plated Steel | Steel | 00000000 | 00000 |
High-Pressure Brass Threaded Pipe Fittings
These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.
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 Use With:
NPT Threads: Air, Water
NPTF, BSPP and Metric Threads: Air, Natural Gas, Oil, Water - Specifications Met: See table
| Pipe Size | For Hole Dia. | For Max. Wall Thick. | Max. Pressure | Specifications Met | Each | |
BSPP Female | ||||||
|---|---|---|---|---|---|---|
| 1/8 | 11/16" | 11/32" | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 000000 |
| 1/4 | 13/16" | 37/64" | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 00000 |
| 3/8 | 1 1/16" | 35/64" | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 00000 |
| 1/2 | 1 1/8" | 25/32" | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 00000 |
| 3/4 | 1 3/8" | 7/8" | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 00000 |
| 1 | 1 11/16" | 61/64" | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 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 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 | |||||
| 1/8 | M16 × 1.5 mm | 0.394" | 2,170 psi @ 72° F | 00000000 | 00000 |
| 1/4 | M20 × 1.5 mm | 0.63" | 1,450 psi @ 72° F | 00000000 | 0000 |
| 3/8 | M26 × 1.5 mm | 0.591" | 1,080 psi @ 72° F | 00000000 | 00000 |
| 1/2 | M28 × 1.5 mm | 0.827" | 725 psi @ 72° F | 00000000 | 00000 |
| 3/4 | M33 × 1.5 mm | 0.886" | 1,230 psi @ 72° F | 00000000 | 00000 |