Introduction
Tube fittings play a crucial role in ensuring leak-proof and secure connections in piping systems, especially in industries that demand precision and durability. Whether it’s oil and gas, chemical processing, pharmaceuticals, or hydraulics, the right tube fittings enhance safety, efficiency, and long-term performance.
As one of the leading tube fittings manufacturers, suppliers, and exporters, Mcneil Instruments delivers premium-quality tube fittings that meet global standards and application requirements. Our reach extends across critical industrial hubs like Texas, Houston, Chicago, Nigeria, Ghana, Malaysia, Brazil, Singapore, Saudi Arabia, Qatar, and Kuwait.
What Are Tube Fittings?
Tube fittings are connectors used to join tubing sections in fluid or gas systems without leakage. They are designed to handle high-pressure and high-temperature conditions while resisting corrosion and wear.
Common Types of Tube Fittings:
- Compression Tube Fittings
- Ferrule Fittings (Single and Double)
- Male and Female Connectors
- Union Elbows and Tee Fittings
- Bulkhead Unions
- Adapters and Couplings
These fittings are manufactured in various materials including Stainless Steel, Brass, Alloy Steel, and Nickel Alloys.
Tube Fittings Dimension Chart
| Tube OD (Outer Diameter) | Thread Size (Inch) | Length (L) | Hex Size (H1) | Hex Size (H2) | Male Thread Length (M) | Female Thread Length (F) |
| 1/8″ (3.18 mm) | 1/8-27 NPT | 1.10″ (28 mm) | 0.44″ (11 mm) | 0.44″ (11 mm) | 0.41″ (10.4 mm) | 0.30″ (7.6 mm) |
| 1/4″ (6.35 mm) | 1/4-18 NPT | 1.30″ (33 mm) | 0.56″ (14 mm) | 0.56″ (14 mm) | 0.48″ (12.2 mm) | 0.37″ (9.4 mm) |
| 3/8″ (9.52 mm) | 3/8-18 NPT | 1.50″ (38 mm) | 0.69″ (17.5 mm) | 0.69″ (17.5 mm) | 0.53″ (13.5 mm) | 0.39″ (9.9 mm) |
| 1/2″ (12.7 mm) | 1/2-14 NPT | 1.75″ (44 mm) | 0.88″ (22 mm) | 0.88″ (22 mm) | 0.67″ (17 mm) | 0.46″ (11.7 mm) |
| 3/4″ (19.05 mm) | 3/4-14 NPT | 2.00″ (51 mm) | 1.06″ (27 mm) | 1.06″ (27 mm) | 0.75″ (19.1 mm) | 0.54″ (13.7 mm) |
| 1″ (25.4 mm) | 1-11.5 NPT | 2.38″ (60 mm) | 1.31″ (33 mm) | 1.31″ (33 mm) | 0.88″ (22.2 mm) | 0.61″ (15.5 mm) |
- Tube OD (Outer Diameter): The outer diameter of the tube in inches or millimeters.
- Thread Size (Inch): The size of the thread for the fitting, usually in NPT (National Pipe Thread) or other standards.
- Length (L): The overall length of the fitting.
- Hex Size (H1 & H2): The size across the flats of the hexagonal sections of the fitting.
- Male Thread Length (M): The length of the male threaded portion.
- Female Thread Length (F): The depth of the female threaded portion.
Global Presence of Mcneil Instruments’ Tube Fittings
United States – Houston,TX & Chicago
Mcneil Instruments supplies high-performance tube fittings to refineries, petrochemical units, and HVAC industries in major U.S. industrial zones. With strict adherence to ASME/ANSI standards, our fittings ensure leak-proof systems even under extreme pressure.
West Africa – Nigeria & Ghana
In regions like Lagos and Accra, where oil exploration and water treatment plants are booming, our tube fittings are known for their durability in corrosive environments and cost-effective performance.
Southeast Asia – Malaysia & Singapore
Malaysia and Singapore’s pharmaceutical, semiconductor, and food processing industries demand ultra-clean piping systems. Our SS tube fittings meet these hygienic and regulatory standards effortlessly.
South America – Brazil
Brazil’s mining, chemical, and power sectors rely on robust tube fittings to handle aggressive media. Mcneil provides high-strength, pressure-rated fittings that support safe and sustainable operations.
Middle East – Saudi Arabia, Qatar & Kuwait
We are a trusted exporter to the Middle East’s oil & gas, desalination, and thermal power sectors, supplying tube fittings that resist chloride stress cracking, oxidation, and thermal fatigue—all vital for desert and offshore conditions.
How to Choose the Right Tube Fittings Supplier
When selecting a tube fittings manufacturer or supplier, consider:
- Compliance with international standards
- Availability in a range of sizes and pressure ratings
- Material quality and traceability
- Export readiness and logistics support
- Experience with your specific industry and application
Why Choose Mcneil Instruments for Tube Fittings?
- Wide Product Range: From single ferrule to double ferrule tube fittings, we cover all connection types.
- Global Certifications: All fittings conform to ASTM, DIN, and ISO standards.
- Precision Engineering: Manufactured using CNC machines for high dimensional accuracy.
- Material Traceability: Complete documentation and material test certificates (MTCs) provided.
- Corrosion Resistance: Ideal for marine, chemical, and high-temperature environments.
Conclusion
For businesses in Texas, Houston, Chicago, Nigeria, Ghana, Malaysia, Brazil, Singapore, Saudi Arabia, Qatar, and Kuwait, partnering with a reliable tube fittings manufacturer, supplier, and exporter like Mcneil Instruments ensures high performance, reliability, and global compliance.
We provide customized solutions, bulk export support, and technical assistance to meet your piping system needs—no matter the scale or complexity.
Get in touch today to request a quote or discuss your project requirements!
