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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Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings
When space is at a premium choose these compact fittings. Though small in size, they have the strength to handle medium-pressure applications. Fittings are stainless steel for very good corrosion resistance.
Metric, BSPP, and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. Made from fluoroelastomer, these gaskets resist chemicals, including benzene, butyl alcohol, and ethylene glycol. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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UN/UNF (SAE Straight)
Male Threads with Gasket
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A314, ASTM A320, ASTM A582
303 Stainless Steel | ||||||
---|---|---|---|---|---|---|
Pipe Size | Thread Size | Max. Pressure | Max. Steam Pressure | Gasket Material | Each | |
NPT Male × UN/UNF (SAE Straight) Male | ||||||
1/16 | 10-32 | 500 psi @ 72° F | 100 psi @ 350° F | Fluoroelastomer Rubber | 00000000 | 000000 |
1/8 | 10-32 | 500 psi @ 72° F | 100 psi @ 350° F | Fluoroelastomer Rubber | 00000000 | 00000 |
1/4 | 10-32 | 500 psi @ 72° F | 100 psi @ 350° F | Fluoroelastomer Rubber | 00000000 | 00000 |
Miniature Low-Pressure Brass Threaded Pipe Fittings
Less than an inch in length, these miniature fittings work well in low-pressure pipe lines that are tight on space. They are brass, which has good corrosion resistance. Nickel-plated brass fittings offer better corrosion resistance than unplated brass.
UN/UNF (SAE Straight) threads are also known as O-ring boss threads; the male threads have a gasket to protect against leaks.
For technical drawings and 3-D models, click on a part number.
Miniature Medium-Pressure Aluminum Threaded Pipe Fittings
Their small size makes these miniature fittings a good choice for cramped, confined spaces. They are designed to handle medium-pressure applications. Fittings are aluminum, which is lightweight with good corrosion resistance.
Metric and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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(SAE Straight) Male
Threads with Gasket
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.
Sealants cannot be sold to Colorado, Connecticut, District of Columbia, Delaware, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, New Hampshire, New Jersey, Northern Virginia, New York, Ohio, Pennsylvania, Rhode Island, or Utah due to local VOC (Volatile Organic Compounds) regulations.
For technical drawings and 3-D models, click on a part number.
Brass Low-Pressure Barbed Tube Fittings for Air and Water
A brass body provides protection against corrosive environments. Fittings have barbs that grip onto tubing.
Fittings with a single barb provide a smooth clamping surface for extra-tight connections that minimize leaks.
UN/UNF (SAE Straight) male threads with gasket provide extra protection against leaks. Also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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(SAE Straight) Male
Threads with Gasket
- Temperature Range: NPT, UN/UNF (SAE Straight) Threads: 32° to 180° F
NPTF Threads: -65° to 75° F
BSPT Threads: -40° to 160° F - Tubing: NPT, UN/UNF (SAE Straight) Threads: Use with firm (Durometer 85A) polyurethane rubber
NPTF Threads: Use with firm (Durometer 95A) polyurethane rubber
BSPT Threads: Use with firm (Durometer 85A) nylon plastic
For Tube ID | Thread Size | Number of Barbs | Material | Gasket Material | Max. Pressure | Lg. | Pkg. Qty. | Pkg. | |
UN/UNF (SAE Straight) Threads | |||||||||
---|---|---|---|---|---|---|---|---|---|
1/16" | 10-32 | Multiple | Brass | Buna-N Rubber | 150 psi @ 72° F | 9/16" | 10 | 0000000 | 000000 |
1/8" | 10-32 | Multiple | Brass | Buna-N Rubber | 150 psi @ 72° F | 5/8" | 10 | 0000000 | 00000 |
1/8" | 10-32 | Multiple | Brass | Buna-N Rubber | 150 psi @ 72° F | 13/16" | 10 | 0000000 | 00000 |
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(SAE Straight) Male
Threads with Gasket
- Temperature Range: 32° to 180° F
- Tubing: Use with firm (Durometer 85A) polyurethane rubber
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
For Tube ID | Thread Size | Number of Barbs | Material | Gasket Material | Max. Pressure | Lg. | Pkg. Qty. | Pkg. | |
UN/UNF (SAE Straight) Threads | |||||||||
---|---|---|---|---|---|---|---|---|---|
1/8" | 10-32 | Single | Brass | Buna-N Rubber | 150 psi @ 72° F | 7/8" | 5 | 0000000 | 000000 |
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ID | OD | Gasket Material | Max. Pressure | Gasket Color | Pkg. Qty. | Pkg. | |
5/32" | 15/64" | Buna-N Rubber | 150 psi @ 72° F | Black | 25 | 0000000 | 00000 |
Nickel-Plated Brass Low-Pressure Barbed Tube Fittings for Air and Water
The nickel plating on these brass fittings provides extra protection against corrosive environments. The plating won’t peel or chip, so the fittings keep a bright, polished appearance. The barbs grip onto tubing, providing a secure hold with no clamp required.
UN/UNF (SAE Straight) and BSPP male threads have an O-ring to protect against leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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(SAE Straight) and BSPP
Male Threads with Gasket
- Temperature Range: -40° to 230° F,
except UN/UNF (SAE Straight) Threads: -20° to 160° F - Tubing: Use with hard (Durometer 60D-90D) Buna-N rubber, EVA plastic, Nylon plastic, polyethylene plastic, polypropylene plastic, polyurethane rubber, PTFE plastic, PVC plastic, PVDF plastic, or silicone rubber,
except UN/UNF (SAE Straight) Threads: Use with firm (Durometer 85A) polyurethane rubber
Aluminum Low-Pressure Barbed Tube Fittings for Air and Water
- For Use With: Air, Lubricated Air, Water
- Temperature Range: -40° to 230° F
- Tubing: Use with hard (Durometer 75A-60D) EVA plastic, polyethylene plastic, polyurethane rubber or PVDF plastic
Made of aluminum, these fittings are lighter in weight than other metal barbed tube fittings and have good corrosion resistance. The barb grips onto tubing, providing a secure hold with no clamp required.
Metric, BSPP, and UN/UNF (SAE Straight) male threads have a gasket or O-ring for a tight seal. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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(SAE Straight) Male
Threads with Gasket
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For Tube ID | Thread Size | Material | Max. Pressure | Each | |
UN/UNF (SAE Straight) Threads | |||||
---|---|---|---|---|---|
1/4" | 10-32 | Aluminum | 125 psi @ 72° F | 00000000 | 00000 |
Choose-a-Color Aluminum Low-Pressure Barbed Tube Fittings for Air and Water
- For Use With: Air, Lubricated Air, Water
- Temperature Range: -40° to 230° F
- Tubing: Use with hard (Durometer 75A-60D) EVA plastic, polyethylene plastic, polyurethane rubber or PVDF plastic
Color-code fittings for easy identification. Fittings are aluminum, which is lightweight with good corrosion resistance. The barb grips onto tubing, providing a secure hold with no clamp required.
Metric and UN/UNF (SAE Straight) male threads have a gasket for a tight seal. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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(SAE Straight) Male
Threads with Gasket
For Tube ID | Thread Size | Material | Gasket Material | Max. Pressure | Choose a Color | Each | |
UN/UNF (SAE Straight) Threads | |||||||
---|---|---|---|---|---|---|---|
1/16" | 10-32 | Anodized Aluminum | Fiber | 125 psi @ 72° F | 00000000 | 00000 | |
1/8" | 10-32 | Anodized Aluminum | Fiber | 125 psi @ 72° F | 00000000 | 0000 | |
0.17" | 10-32 | Anodized Aluminum | Fiber | 125 psi @ 72° F | 00000000 | 0000 | |
1/4" | 10-32 | Anodized Aluminum | Fiber | 125 psi @ 72° F | 00000000 | 0000 |
Stainless Steel High-Pressure Barbed Tube Fittings for Air and Water
- Temperature Range: See table
- Tubing: Use with firm (Durometer 75A-95A) EVA plastic, polyethylene plastic, polypropylene plastic or PVC plastic
Fittings withstand pressures up to 250 psi. They are 303 stainless steel for very good corrosion resistance.
Metric, BSPP, and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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UN/UNF (SAE Straight)
Male Threads with Gasket
For Tube ID | Thread Size | Material | Gasket Material | Max. Pressure | Temp. Range, °F | Number of Barbs | Each | |
UN/UNF (SAE Straight) Threads | ||||||||
---|---|---|---|---|---|---|---|---|
0.012" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | None | 0000000 | 000000 |
0.02" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | None | 0000000 | 00000 |
0.025" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | None | 0000000 | 00000 |
1/32" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | Single | 0000000 | 00000 |
0.04" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | None | 0000000 | 00000 |
0.058" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | None | 0000000 | 00000 |
1/16" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | Single | 0000000 | 0000 |
5/64" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | Single | 0000000 | 0000 |
1/8" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | Single | 0000000 | 0000 |
0.17" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | Single | 0000000 | 0000 |
1/4" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | Single | 0000000 | 0000 |
7/16" | 10-32 | 303 Stainless Steel | Viton® Fluoroelastomer Rubber | 250 psi @ 72° F | -40° to 1200° F | Single | 0000000 | 00000 |
Plastic Barbed Tube Fittings for Air and Water
Fittings have barbs that grip onto tubing.
Nylon fittings have excellent impact and abrasion resistance.
For technical drawings and 3-D models, click on a part number.
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- Temperature Range: 32° to 140° F
- Tubing: Use with firm or soft (Durometer 70A-90A) polyurethane rubber or PVC plastic
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
Tight-Seal Plastic Barbed Tube Fittings for Air and Water
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. Fittings are nylon for excellent impact and abrasion resistance.
For technical drawings and 3-D models, click on a part number.
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- Temperature Range: See table
- Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber or PVC plastic
Tight-Seal Moisture-Resistant Plastic Barbed Tube Fittings for Air and Water
- Temperature Range: -20° to 280° F
- Tubing: Use with firm or soft (Durometer 50A-90A) polyurethane rubber or PVC plastic
- Specifications Met: FDA Compliant 21 CFR 177.2470
Fittings have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Made of acetal, they won’t absorb water and lose strength, even in high-humidity environments.
For technical drawings and 3-D models, click on a part number.
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For Tube ID | Thread Size | Material | Color | Clarity | Max. Pressure | Each | |
UNF Threads | |||||||
---|---|---|---|---|---|---|---|
1/16" | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 00000 |
3/32" | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 000 |
1/8" | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 000 |
5/32" | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 000 |
Easy-View Plastic Barbed Tube Fittings for Air and Water
- Temperature Range: -210° to 270° F
- Tubing: Use with firm or soft (Durometer 45A-90A) polyurethane rubber or PVC plastic
Monitor flow with these clear fittings. They have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Fittings are polycarbonate for excellent impact resistance.
For technical drawings and 3-D models, click on a part number.
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For Tube ID | Thread Size | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
UN/UNF (SAE Straight) Threads | |||||||
---|---|---|---|---|---|---|---|
1/16" | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
3/32" | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
1/8" | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
5/32" | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
Push-to-Connect Tube Fittings for Air
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UN/UNF (SAE Straight)
Male Threads with Gasket
- Temperature Range: 0° to 170° F
- Tubing: Use with firm (Durometer 95A-45D) polyethylene plastic or polyurethane rubber
- Specifications Met: ISO 14743, except polybutylene plastic fittings
Insert tubing into these fittings and an internal gripping ring and O-ring hold the tubing tight. They are also known as instant fittings. To disconnect, push on the release ring and pull the tubing out of the fitting. Fittings have good corrosion resistance.
Identification rings (sold separately) snap over the release ring so you can color-code your lines.
Clips (sold separately) align and organize your tubing and fittings.
BSPP and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
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UN/UNF (SAE Straight)
Male Threads with Gasket
Fittings with tube stem insert into the push-to-connect end of another fitting in place of a length of tubing.
Tube Stem OD | Thread Size | Tube Connection Material | Pipe Connection Material | Gasket Material | Color | Max. Pressure | Each | |
UN/UNF (SAE Straight) Threads | ||||||||
---|---|---|---|---|---|---|---|---|
5/32" | 10-32 | Nylon Plastic | Nickel-Plated Brass | Buna-N Rubber | Black | 290 psi @ 72° F | 00000000 | 000000 |
Brass Quick-Turn Tube Couplings for Air
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An all-brass body gives these couplings better strength and durability than plastic quick-turn couplings. They have a nickel plating for extra protection against corrosive environments. Also known as luer lock couplings, they consist of a plug and socket (sold separately) that connect with a half turn. They have a compact body, so they’re easy to fit in tight spaces. Plugs and sockets are open-flow style, so there is no shut-off valve to stop the flow when the coupling is separated. They have a universal connection, so the plugs will connect to any of the sockets, regardless of the pipe or tube size.
Note: For a complete coupling, order a plug and a socket.
For technical drawings and 3-D models, click on a part number.
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- Temperature Range: -100° to 300° F
Thread Size | Material | Max. Pressure | Each | |
UN/UNF (SAE Straight) Threads | ||||
---|---|---|---|---|
10-32 | Nickel-Plated Brass | 30 psi @ 72° F | 000000000 | 00000 |
Low-Profile High-Pressure Quick-Disconnect Tube Couplings for Air
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- Temperature Range: -30° to 250° F
- Tubing: Use with firm or soft (Durometer 35A-90A) Buna-N rubber, EVA plastic, gum rubber, latex rubber, neoprene rubber, polyurethane rubber, PVC plastic or silicone rubber, except for fittings with pipe end
With no latch, these couplings have a compact design to fit in small spaces. They connect with a push and disconnect with a pull, so you can easily access your line. Couplings consist of a plug and a socket (sold separately). They have a universal connection, so the plugs will connect to any of the sockets regardless of the pipe or tube size. They are nickel-plated brass for very good corrosion resistance.
Note: For a complete coupling, order a plug and a socket.
For technical drawings and 3-D models, click on a part number.
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Open Flow | ||||
---|---|---|---|---|
Thread Size | Material | Max. Pressure | Each | |
UN/UNF (SAE Straight) Threads | ||||
10-32 | Nickel-Plated Brass | 700 psi @ 72° F | 0000000 | 00000 |
Plastic Barbed Tube Fittings for Food and Beverage
- Temperature Range: 32° to 250° F
- Tubing: Use with soft or firm (Durometer 45A-90A) polyurethane rubber, PVC plastic, or silicone rubber
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. They’re FDA compliant for direct contact with food. Fittings are polypropylene, which has excellent impact and abrasion resistance. Use them on soft or firm tubing.
For technical drawings and 3-D models, click on a part number.
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For Tube ID | Thread Size | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
UN/UNF (SAE Straight) Threads | ||||||||
---|---|---|---|---|---|---|---|---|
1/16" | 10-32 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 00000 |
3/32" | 10-32 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 0000 |
1/8" | 10-32 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 0000 |
5/32" | 10-32 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 0000 |
Barbed Fittings for Plastic and Rubber Tubing—Chemicals
- For Use With: Alcohol, Coolant, Mild Bases
- Temperature Range: See table
- Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber, PVC plastic, or Viton® fluoroelastomer rubber
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. Fittings are polypropylene, which has very good chemical resistance as well as impact and abrasion resistance.
For technical drawings and 3-D models, click on a part number.
Grease Fittings
Thread these fittings into motors, bearings, engine blocks, and other machinery to create a lubrication point. They’re also known as hydraulic grease fittings.
Zinc-plated steel fittings have mild corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Flush-Style Grease Fittings
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The nipple doesn't stick out, so these fittings fit in tight spaces and won't be damaged if something knocks into them. An integral check valve prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.
Zinc-plated steel fittings have mild corrosion resistance.
Install Styles A, B, and D with a slotted screwdriver. UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.
For technical drawings and 3-D models, click on a part number.
Pkg. | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Style | Material | Overall Ht. | Thread Lg. | Shank Lg. | Slot Lg. | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
Straight with Male Threads | |||||||||||
10-32 UNF Threads | |||||||||||
A | Zinc-Plated Steel | 3/8" | 3/16" | 15/64" | 1/4" | 10,000 | Ball | 5 | 00000000 | 00000 | 00000 |
Grease Fitting Adapters
When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.
Brass adapters resist corrosion better than zinc-plated steel adapters. UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.
For technical drawings and 3-D models, click on a part number.
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Connection | ||||
---|---|---|---|---|
Male | Female | Material | Pkg. | |
Adapters | ||||
UN/UNF (SAE Straight) 10-32 | NPT 1/8 | 360 Brass | 00000000 | 000000 |