Stainless Steel Tube Fittings Manufacturer, Supplier, Stockist, and Exporter in India – Mcneil Instruments
Mcneil Instruments is a leading Stainless Steel Tube Fittings Manufacturer, Supplier, and Exporter in India, offering a wide range of high-performance fittings in premium grades such as 304, 304L, 316, 316L, 321, 347, Duplex 2205, Super Duplex 2507, 17-4PH, and 15-5PH. Designed for precision, durability, and corrosion resistance, our tube fittings are widely used in petrochemical, pharmaceutical, marine, food processing, and instrumentation systems worldwide.
Stainless Steel 304 Tube Fittings
At Mcneil Instruments, we are a leading manufacturer, supplier, stockist, and exporter of Stainless Steel 304 Tube Fittings in India, delivering precision-engineered solutions tailored for diverse industrial applications. Our SS 304 tube fittings are designed to provide reliable performance, long-lasting durability, and superior corrosion resistance under harsh environments.
Made from high-grade chromium-nickel alloy (18% chromium, 8% nickel), our fittings exhibit excellent resistance to oxidizing agents, making them suitable for acidic and corrosive conditions. Their high strength and hygienic properties make them ideal for food & beverage, pharmaceuticals, petrochemicals, chemical plants, and high-pressure fluid systems.
We offer a broad range of SS 304 compression fittings, available in various configurations, sizes, and pressure ratings to suit your project requirements. Each fitting complies with international standards, ensuring quality, safety, and long-term value.
Specifications of SS 304 Tube Fittings
| Specifications | Details |
| Standards | ASTM A276 / A479, ASTM A182, ASME SA276 / SA479, ASME SA182 |
| Tube Size | 1/8″ to 2″ (SS 304 Tube Fittings) 24″ to 96″ & Custom Sizes (SS 304 Welded Tube Fittings) |
| Thread Types | NPT, BSPT, BSPP |
| Material Compatibility | Stainless Steel 304, Brass (ASTM A276 / A479) |
| Pressure Ratings | Up to 3000 Psi (SS) / Up to 10,000 Psi (Brass) |
Grades We Offer in Stainless Steel 304 Tube Fittings
- SS UNS S30409 Male Connector
- SS 304 Male Elbow NPT
- 304H SS Reducing Male Elbow NPT
- SS 304H Male Connector
- SS UNS S30409 Reducing Male Elbow NPT
- SS 304H Male Bulkhead Connector
- SS UNS S30409 Male Bulkhead Connector
- SS 304 Male Run Tee
- SS 304H Male Branch Tee
- SS UNS S30409 Male Branch Tee
Whether you require high-purity fittings for pharmaceutical lines or robust connectors for chemical processing, Mcneil Instruments delivers stainless steel 304 tube fittings that exceed expectations. Get in touch today for bulk orders, technical consultation, or export inquiries.
Stainless Steel 304L Tube Fittings
Mcneil Instruments is a trusted name in the industry as a leading manufacturer, supplier, stockist, and exporter of Stainless Steel 304L Tube Fittings in India. Designed for applications demanding lower carbon content and high corrosion resistance, our SS 304L tube fittings are ideal for low-pressure systems, especially where welding is required.
Made with approximately 0.03% carbon, 304L grade stainless steel offers slightly reduced mechanical strength compared to SS 304 but enhances weldability and corrosion resistance—making it suitable for sensitive environments such as refrigeration, air conditioning systems, and gas distribution lines. These fittings are commonly used in oil & gas, chemical processing, refineries, and instrumentation systems, where safe, leak-proof connections are essential.
Our ASTM A479 304L Instrumentation Tube Fittings are available in single and double ferrule designs, built for easy installation and long-lasting performance. The fittings are designed to resist corrosion, simplify maintenance, and reduce downtime.
Specifications of SS 304L Tube Fittings
| Property | Details |
| Material Grade | 304L Stainless Steel |
| Equivalent Brands | DK-LOK, PARKER, SWAGELOK, HOKE |
| Available Sizes | 3mm – 50mm and 1/8″ – 2″ |
| Pressure Ratings | 1000, 3000, 6000, and 10,000 PSI |
| Fitting Types | Tube to Male / Female / Union |
| Standards | Type 304L-SS, ASME SA-479, DIN 4401, BS 970 304S11, ASTM A276 |
| End Connections | Welding, Threaded, JIC |
| Thread Types | BSPT, NPT, BSPP |
| Material Standards | Round Bar: ASTM A182 Hex Bar: ASTM A276 |
SS 304L Compression Fittings Pressure Rating
| NPT/ISO Pipe Size (in.) | Female Fitting PSIG (BAR) | Male Fitting PSIG (BAR) |
| 1/16 | 6,700 (461) | 11,000 (757) |
| 1/8 | 6,500 (447) | 10,000 (689) |
| 1/4 | 6,600 (454) | 8,000 (551) |
| 3/8 | 5,300 (365) | 7,800 (537) |
| 1/2 | 4,900 (337) | 7,700 (530) |
| 3/4 | 4,600 (316) | 7,300 (502) |
| 1 | 4,400 (303) | 5,300 (365) |
| 1 1/4 | 5,000 (344) | 6,000 (413) |
| 1 1/2 | 4,600 (316) | 5,000 (344) |
| 2 | 3,900 (268) | 3,900 (268) |
Whether for critical gas lines or industrial instrumentation, Mcneil Instruments delivers Stainless Steel 304L tube fittings that ensure safety, reliability, and value.
Stainless Steel 316 Tube Fittings
Mcneil Instruments is a reputed manufacturer, supplier, stockist, and exporter of Stainless Steel 316 Tube Fittings in India, offering reliable solutions for critical industrial operations. Known for their excellent corrosion resistance, our SS 316 tube fittings are designed to perform in aggressive environments including chemical processing, offshore platforms, marine, food processing, and pharmaceutical industries.
The 316 stainless steel grade contains molybdenum, which provides enhanced resistance to pitting, crevice corrosion, and general corrosion—especially in chloride-rich environments such as seawater. These fittings are widely used in applications where SS 304 falls short, thanks to their superior strength and ability to resist harsh chemicals and saline solutions.
Our ASTM A276 316 Stainless Steel Tube Clamp Fittings are ideal for marine applications, while SS 316 Female Elbows are valued for their weldability without the risk of carbide precipitation. Whether for air tube systems, process instrumentation, or chemical flow lines, Mcneil’s 316 SS fittings provide dependable and leak-free performance.
Material Specification of AISI 316 Instrument Fittings
| Property | Details |
| Fitting Types | Tube to Male / Union / Female |
| Available Sizes | 3mm to 50mm and 1/8″ to 2″ |
| Standards | ASTM A479, DIN 1.4401, BS970 316-S31 |
| Brand Equivalents | PARKER, SWAGELOK, HOKE, DK-LOK |
| Pressure Ratings | 1000, 3000, 6000, 10000 Psi |
| HS Code | 73072900 |
| End Connections | Welding, Threaded, JIC |
| Thread Types | BSPT, NPT, BSPP |
| Material Specs | ASTM A182 (Forged), ASTM A276 (Bar Stock) |
At Mcneil Instruments, we provide high-grade SS 316 instrumentation tube fittings built to international standards. Whether you’re seeking fittings for corrosive marine environments or aggressive chemical flow systems, our 316-grade fittings offer unmatched durability and integrity.
Stainless Steel 316L Tube Fittings
Mcneil Instruments is a leading manufacturer, supplier, stockist, and exporter of Stainless Steel 316L Tube Fittings in India. Our fittings are crafted with precision, adhering to international design codes and quality standards, and are available in various sizes, grades, and custom configurations.
316L Stainless Steel belongs to the austenitic family and is known for its low carbon content, excellent ductility, and corrosion resistance. The presence of nitrogen in its composition compensates for the low carbon, maintaining strength and weldability. This makes it ideal for use in marine environments, chemical processing, and instrumentation applications where resistance to pitting and crevice corrosion is critical.
These fittings offer reliable performance in moderately corrosive and high-temperature environments (up to 840°C intermittent, 900°C continuous), making them suitable for heat exchangers, gas handling systems, refineries, and power plants.
Technical Specification of Stainless Steel 316L Tube Fittings
| Parameter | Specification |
| Grade | Stainless Steel 316L |
| Types | Tube to Male / Union / Female |
| Sizes | 3mm to 50mm and 1/8” to 2” |
| Standards | ASTM A479, DIN 1.4404, BS970 316S11 |
| Equivalent Brands | PARKER, SWAGELOK, HOKE, DK-LOK |
| Pressure Ratings | 3000 Psi, 6000 Psi, 10000 Psi (based on configuration) |
| Ends | Welding, Threaded, JIC |
| Thread Types | BSPT, NPT, BSPP |
| Material Specs | ASTM A182 (Forged), ASTM A276 (Bar Stock) |
| HS Code | 73072900 |
| Applications | Marine, Oil & Gas, Instrumentation, Chemical Processing, HVAC |
At Mcneil Instruments, our Stainless Steel 316L Tube Fittings are known for their durability, clean installation, and leak-proof performance. We offer on-time delivery, custom packaging, and global shipping to ensure your projects stay on schedule.
Stainless Steel 321 Tube Fittings
Mcneil Instruments is a trusted manufacturer, supplier, stockist, and exporter of Stainless Steel 321 Tube Fittings in India, offering high-quality solutions for demanding industrial applications. Known for our precision manufacturing and strict quality standards, we cater to both domestic and international clients with reliable, high-performance instrumentation fittings.
Stainless Steel 321 is a titanium-stabilized austenitic alloy known for its exceptional resistance to intergranular corrosion after exposure to high temperatures. It is ideal for high-temperature service environments such as in chemical processing, petroleum refining, power generation, and shipbuilding industries.
At Mcneil Instruments, every SS 321 tube fitting is manufactured using carefully selected raw materials and is tested rigorously by our quality team to ensure it meets international specifications. Our wide range of fittings comes in various wall thicknesses, finishes, dimensions, and custom configurations to suit project-specific needs.
We maintain a robust inventory and storage system, enabling us to meet bulk and urgent requirements efficiently, with timely and safe delivery across global markets.
Technical Specification of Stainless Steel 321 Tube Fittings
| Parameter | Specification |
| Size (Seamless) | From 1/8″ to 2″ |
| Size (Welded) | From 24″ to 96″ (custom as per requirement) |
| Pressure Rating | 3000 psi to 10000 psi |
| OEM Support | Yes |
| Production Capacity | 2000 pieces per week |
| Material Composition | Stainless Steel (ASTM A403 WP304, 304L, 316, 316L, 321, 1Cr18Ni9Ti, 00Cr19Ni10) |
| Alloy Steel (ASTM A234 WP12, WP11, WP22, WP91, Cr5Mo, 12Cr1MoV, etc.) | |
| Applications | Petroleum, Chemical, Power, Shipbuilding, Construction, Machinery, etc. |
| Packing Options | Wooden box (38×27×17 CM), Cartons (21×16×14 CM / 31×21×16 CM) |
Mcneil Instruments ensures consistency in quality, precision in dimension, and long-term performance for all Stainless Steel 321 Instrumentation Tube Fittings, making us the preferred supplier in India and across global markets.
Stainless Steel 347 Tube Fittings
Mcneil Instruments is a leading manufacturer, supplier, stockist, and exporter of Stainless Steel 347 Tube Fittings in India, delivering durable and high-performance solutions for industrial instrumentation systems. Our SS 347 fittings are engineered to handle elevated temperature service and corrosive environments, making them ideal for industries such as aerospace, chemical processing, refinery operations, and marine engineering.
Stainless Steel 347 is a niobium-stabilized austenitic alloy that offers superior resistance to intergranular corrosion, even after exposure to high temperatures in the sensitization range (800°F – 1500°F / 427°C – 816°C). It is particularly suited for applications involving repeated heating and cooling cycles.
At Mcneil Instruments, we manufacture SS 347 Tube Fittings under strict quality control protocols, ensuring each fitting meets global standards for mechanical strength, corrosion resistance, and dimensional accuracy. We provide a wide range of tube-to-male, female, union and custom fittings to match specific project needs.
Technical Specification of Stainless Steel 347 Tube Fittings
| Parameter | Specification |
| Material | Stainless Steel 347 (Niobium stabilized austenitic alloy) |
| Size Range (Seamless) | 1/8” to 2” |
| Size Range (Welded) | 24” to 96” (custom sizes available) |
| Pressure Rating | 3000 psi to 10000 psi |
| Applications | Refinery equipment, Heat exchangers, High-temp piping, Power plants, Petrochemical |
| Standards | ASTM A182 / ASTM A276 / ASTM A403 |
| Connection Types | Tube to Male/Female, Union, Elbow, Tee, Bulkhead |
| Thread Types | NPT, BSPT, BSPP |
| Packing Options | Wooden Boxes & Secure Cartons |
| Production Capacity | Up to 2000 units/week |
| OEM Customization | Available |
At Mcneil Instruments, our Stainless Steel 347 Instrumentation Tube Fittings are trusted globally for their mechanical stability, thermal performance, and precision-engineered design, ensuring leak-proof and long-lasting connections in critical systems.
Stainless Steel Duplex 2205 Tube Fittings
Mcneil Instruments is a trusted manufacturer, supplier, stockist, and exporter of Stainless Steel Duplex 2205 Tube Fittings in India. Our Duplex 2205 fittings are engineered to deliver exceptional strength and corrosion resistance, especially in harsh and aggressive environments. With a perfect balance of austenitic and ferritic microstructures, Duplex 2205 offers superior mechanical properties over standard stainless steels like 304 or 316.
These tube fittings are widely used in industries such as oil and gas, chemical processing, marine, desalination plants, and offshore platforms, where high resistance to chloride stress corrosion cracking, pitting, and crevice corrosion is essential. Mcneil Instruments provides a wide range of Duplex 2205 instrumentation fittings, including male connectors, elbows, tees, and unions, built to match stringent industrial standards.
Our Duplex 2205 Tube Fittings are manufactured under strict quality controls, ensuring dimensional accuracy, high pressure tolerance, and long service life in corrosive media and high-stress applications.
Technical Specification of Stainless Steel Duplex 2205 Tube Fittings
| Parameter | Specification |
| Material | Duplex Stainless Steel 2205 (UNS S32205 / S31803) |
| Size Range | 3mm to 50mm & 1/8″ to 2″ |
| Pressure Rating | Up to 10000 psi |
| Standards | ASTM A479, ASTM A182, ASME SA276, DIN 1.4462 |
| Connection Types | Tube to Male/Female, Union, Elbow, Tee, Bulkhead |
| Thread Types | NPT, BSPT, BSPP |
| Corrosion Resistance | Excellent resistance to pitting, crevice, and chloride-induced stress corrosion |
| Applications | Marine piping, Offshore rigs, Heat exchangers, Desalination units, Chemical plants |
| Ends | Threaded, Welded, JIC |
| OEM Support | Custom designs & markings available |
At Mcneil Instruments, our Duplex 2205 Tube Fittings are preferred globally for demanding operations where strength, corrosion resistance, and safety are critical. With robust distribution and export capabilities, we deliver excellence to every corner of the world.
Stainless Steel Super Duplex 2507 Tube Fittings
Mcneil Instruments is a reputed manufacturer, supplier, stockist, and exporter of Stainless Steel Super Duplex 2507 Tube Fittings in India. Designed for extreme industrial environments, Super Duplex 2507 (UNS S32750) offers a unique combination of excellent corrosion resistance, very high strength, and superior performance under high-pressure applications.
These tube fittings are ideal for aggressive chloride-bearing environments such as chemical processing, offshore oil and gas, marine engineering, and desalination plants, where conventional stainless steels fail to perform. With higher levels of chromium, molybdenum, and nitrogen, Super Duplex 2507 provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.
At Mcneil Instruments, we ensure every fitting meets strict international standards, offering precision, long-term durability, and safety for critical applications. Our product range includes a variety of configurations such as male/female connectors, elbows, tees, and unions, suitable for both industrial and instrumentation needs.
Technical Specification of Stainless Steel Super Duplex 2507 Tube Fittings
| Parameter | Specification |
| Material | Super Duplex Stainless Steel 2507 (UNS S32750) |
| Size Range | 3mm to 50mm & 1/8″ to 2″ |
| Pressure Rating | Up to 10000 psi |
| Standards | ASTM A479, ASTM A182, ASME SA276, DIN 1.4410 |
| Connection Types | Tube to Male/Female, Union, Elbow, Tee, Bulkhead |
| Thread Types | NPT, BSPT, BSPP |
| Corrosion Resistance | Excellent in seawater, high chloride, and acidic environments |
| Applications | Offshore rigs, Oil refineries, Desalination systems, Chemical tanks, Heat exchangers |
| Ends | Threaded, Welded, JIC |
| OEM Support | Custom-built fittings with global compatibility |
Mcneil Instruments is proud to be one of India’s top suppliers of Super Duplex 2507 Tube Fittings, delivering uncompromised quality and performance to clients in India and across 80+ export countries.
Stainless Steel 17-4PH Tube Fittings
Mcneil Instruments is a leading manufacturer, supplier, stockist, and exporter of Stainless Steel 17-4PH Tube Fittings in India. Known for their high strength, hardness, and corrosion resistance, these fittings are widely used in aerospace, nuclear energy, petrochemical, marine, and industrial process systems.
17-4PH (UNS S17400) is a precipitation-hardened martensitic stainless steel that provides an excellent balance of mechanical properties. It delivers impressive tensile strength, excellent creep resistance, and oxidation resistance up to 600°F (316°C). This makes it a preferred material for applications where both corrosion resistance and mechanical performance are crucial.
Our 17-4PH instrumentation tube fittings are manufactured under stringent quality controls and in compliance with ASTM and ASME standards, making them suitable for high-pressure and high-stress environments. These fittings are available in a variety of configurations, including male connectors, elbows, tees, and union types, catering to multiple industry needs.
Technical Specification of Stainless Steel 17-4PH Tube Fittings
| Parameter | Specification |
| Material | Stainless Steel 17-4PH (UNS S17400) |
| Size Range | 3mm to 50mm & 1/8″ to 2″ |
| Standards | ASTM A564, ASME SA564, DIN 1.4542 |
| Pressure Rating | Up to 10000 psi |
| Hardness Range | 28–44 HRC depending on heat treatment condition |
| Connection Types | Tube to Male/Female, Union, Elbow, Tee |
| Thread Types | NPT, BSPT, BSPP |
| Heat Treatment | Solution treated and precipitation hardened |
| Applications | Aerospace components, Offshore equipment, Pressure vessels, Marine fittings |
| Ends | Threaded, Welded, JIC |
| OEM Support | Available with custom configurations and global compatibility |
At Mcneil Instruments, our 17-4PH Tube Fittings are engineered for precision and performance, trusted across demanding sectors for their durability under extreme environments. Backed by a global export network and industry-leading expertise, we ensure timely delivery and superior service to clients worldwide.
Stainless Steel 15-5PH Tube Fittings
Mcneil Instruments is a prominent manufacturer, supplier, stockist, and exporter of Stainless Steel 15-5PH Tube Fittings in India. These fittings are widely used in aerospace, chemical, food processing, paper, and power generation industries due to their high strength, toughness, and corrosion resistance.
15-5PH (UNS S15500) is a precipitation hardening stainless steel that provides superior mechanical properties and uniform strength in thicker sections compared to 17-4PH. It offers excellent resistance to corrosion, pitting, and stress corrosion cracking, making it suitable for use in high-pressure and chemically aggressive environments.
At Mcneil Instruments, we offer precision-engineered 15-5PH instrumentation tube fittings that meet ASTM, ASME, and DIN standards. Available in a variety of types like male connectors, elbows, tees, unions, and more, our fittings are manufactured for leak-free performance and long-term durability.
Technical Specification of Stainless Steel 15-5PH Tube Fittings
| Parameter | Specification |
| Material | Stainless Steel 15-5PH (UNS S15500) |
| Size Range | 3mm to 50mm & 1/8″ to 2″ |
| Standards | ASTM A564, ASME SA564, DIN 1.4545 |
| Pressure Rating | Up to 10,000 psi (depending on configuration) |
| Hardness Range | Up to 40 HRC depending on heat treatment |
| Connection Types | Tube to Male/Female, Union, Tee, Elbow |
| Thread Types | NPT, BSPT, BSPP |
| Heat Treatment | Precipitation hardening (H900–H1150 conditions) |
| Applications | Aerospace, Power Plants, Food Equipment, Marine Systems |
| Ends | Threaded, Welded, JIC |
| OEM Support | Available for custom sizes and design flexibility |
Mcneil Instruments ensures that each 15-5PH Tube Fitting we deliver meets the highest levels of precision, reliability, and safety. Trusted by clients globally, we support industries with robust product quality and fast delivery, making us a preferred partner in high-performance applications.