Threaded Cap Fittings Manufacturer in India
Threaded Cap Fittings Manufacturer in India
Sachiya Steel International is a leading Threaded Cap Fittings Manufacturer in India, established in 2005 and based in Mumbai. With 20+ years of industry experience, we have built a strong presence in the global steel industry and serve customers across 85+ countries. We focus on maintaining consistent quality, offering competitive solutions, and building lasting business relationships through reliable service.
We follow a quality-driven approach and works according to applicable ASTM, ASME, ANSI, DIN, and ISO standards. We support material traceability, inspection, testing, and documentation based on project requirements. With established manufacturing and sourcing capabilities, we manage diverse industrial requirements while maintaining professional communication and dependable delivery schedules. Our commitment to technical compliance, responsible practices, and customer satisfaction continues to strengthen our presence in international markets.
What Are Threaded Cap Fittings?
Threaded cap fittings are pipe fittings designed to close the open end of a threaded pipe. They feature internal threads that connect to the external threads of a pipe, helping prevent fluid or gas from escaping. These fittings support secure pipe closure in industrial piping systems and allow removal when access or maintenance is required.
Threaded caps are available with thread types such as NPT and BSPT, depending on the application and piping requirements. Installers may use suitable thread sealants to help create a leak-resistant connection. Standards such as ASME B16.11 cover forged fitting dimensions, while ASME B1.20.1 specifies NPT threads. The appropriate material grade, pressure class, and fitting specifications depend on the system design and operating conditions.
Threaded Cap Fittings
High-quality threaded cap fittings are available in stainless steel, carbon steel, alloy steel, duplex and nickel alloys, in various sizes, thread types and pressure ratings. Offered in grades such as SS 304, 316, ASTM A234 WPB, Duplex 2205 and Inconel 625, these fittings provide secure pipe-end closure for industrial, chemical, petrochemical and engineering applications.
Threaded Cap Fittings Types We Supply
As an experienced Threaded Cap Fittings Manufacturer, we offer different types based on pressure class, thread specifications, and material grades to meet industrial piping requirements. Each type suits specific operating conditions, and selection depends on system pressure, temperature, material compatibility, and applicable standards.
- Class 3000 Threaded Cap: Designed for general industrial piping applications involving suitable pressure and temperature conditions.
- Class 6000 Threaded Cap: Used in piping systems designed for higher-pressure operating conditions.
- NPT Threaded Cap: Features tapered threads manufactured to ASME B1.20.1 for compatible pipe connections.
- BSPT Threaded Cap: Uses tapered British Standard Pipe threads according to ISO 7-1.
- BSPP Threaded Cap: Features parallel British Standard Pipe threads according to ISO 228-1, typically requiring a suitable sealing arrangement.
- Carbon Steel Threaded Cap: Commonly manufactured from ASTM A105 forged carbon steel for suitable industrial service conditions.
- Stainless Steel Threaded Cap: Available in grades such as 304 and 316 for applications requiring corrosion resistance.
- Low-Temperature Threaded Cap: Can be manufactured from ASTM A350 LF2 material for suitable low-temperature service.
As a threaded cap fittings manufacturer, we focus on material quality, dimensional accuracy, and compliance with applicable specifications. The right type depends on the piping design, pressure class, thread compatibility, and operating environment.
Why Choose Threaded Cap Fittings?
Threaded cap fittings provide a practical way to close threaded pipe ends without welding, making installation and removal easier during maintenance or system modifications. Their compact design supports a range of industrial piping applications, while suitable material grades and thread specifications help meet different operating requirements. These fittings are used across oil and gas, chemical processing, power generation, marine, and engineering industries.
- Easy Installation: Internal threads allow direct connection to compatible externally threaded pipes.
- Convenient Maintenance: The threaded connection allows removal when inspection or pipe access is necessary.
- Secure Pipe Closure: Proper thread engagement and suitable sealing methods help prevent leakage.
- Material Options: Available in stainless steel, carbon steel, alloy steel, duplex steel, and selected nickel alloys.
- Different Pressure Classes: Options such as Class 3000 and Class 6000 support piping systems designed for the corresponding service conditions.
- Versatile Applications: Suitable for compatible piping systems carrying liquids and gases across various industries.
Choosing the correct threaded cap requires attention to material grade, thread type, pressure rating, temperature, and applicable standards. Proper selection and installation help support safe, reliable piping system performance.
Types of Caps Fittings
Explore our range of industrial cap fittings, including pipe end caps, butt weld caps, threaded caps, socket weld caps, stainless steel caps and carbon steel caps for diverse piping applications.
Pipe End Cap Fittings
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Butt Weld Cap Fittings
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Threaded Cap Fittings
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Socket Weld Cap Fittings
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Stainless Steel Cap Fittings
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Carbon Steel Cap Fittings
→Get Certified Threaded Cap Fittings at Competitive Factory Prices
Threaded Cap Fittings Specifications
| Property | Specification |
|---|---|
| Product Name | Threaded Cap Fittings |
| Types | Class 3000, Class 6000, NPT, BSP, galvanised |
| Size Range | 1/8" to 4" NB |
| Pressure Class | 3000#, 6000# |
| Thread Types | NPT, BSPT, BSPP |
| Materials | Carbon steel, low temperature steel, alloy steel, stainless steel, duplex, super duplex, nickel alloys |
| Dimension Standards | ASME B16.11, BS 3799 |
| Thread Standards | ASME B1.20.1 (NPT), ISO 7-1 (BSPT), ISO 228-1 (BSPP) |
| Material Standards | ASTM A105, A182, A350 |
| Construction | Forged and CNC machined |
| Surface Finish | Black, oil coated, galvanised, pickled, polished |
| Heat Treatment | Normalising, solution annealing |
| Testing | PMI, thread gauging, hardness, hydrostatic, dimensional |
| Certification | EN 10204 3.1, 3.2 on request |
| How to Order | Size, class, thread, grade and standard (for example: Threaded Cap 1", Class 3000, NPT, A105, ASME B16.11) |
| Custom Work | Special threads, vent holes and grades |
Threaded Cap Fittings Chemical Composition
Values are in %, maximum unless a range is shown.
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| A105 | 0.35 | 0.60–1.05 | 0.10–0.35 | 0.035 | 0.040 | 0.30 | 0.40 | 0.12 |
| A350 LF2 | 0.30 | 0.60–1.35 | 0.15–0.30 | 0.035 | 0.040 | 0.30 | 0.40 | 0.12 |
| A182 F304 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–11.0 | – |
| A182 F304L | 0.030 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–13.0 | – |
| A182 F316 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| A182 F316L | 0.030 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–15.0 | 2.0–3.0 |
| A182 F51 (UNS S31803) | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 |
A105 also carries up to 0.40% copper and 0.05% vanadium. Duplex F51 carries 0.08–0.20% nitrogen.
Threaded Cap Fittings Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| A105 | 485 min | 250 min | 22 min |
| A350 LF2 Class 1 | 485–655 | 250 min | 22 min |
| A182 F304 / F316 | 515 min | 205 min | 30 min |
| A182 F304L / F316L | 485 min | 170 min | 30 min |
| A182 F51 | 620 min | 450 min | 25 min |
Threaded Cap Fittings Size Chart
| NPS | NB | Pipe OD (mm) | Where This Threaded Cap Size Goes |
|---|---|---|---|
| 1/8" | 6 | 10.3 | Gauge and sensor line ends |
| 1/4" | 8 | 13.7 | Instrument air and small hydraulic line ends |
| 3/8" | 10 | 17.1 | Pneumatic and lubrication line ends |
| 1/2" | 15 | 21.3 | Sample points and test connections |
| 3/4" | 20 | 26.7 | Compressor and utility air line ends |
| 1" | 25 | 33.4 | Chemical dosing and skid piping ends |
| 1 1/4" | 32 | 42.2 | Cooling water and fuel line ends |
| 1 1/2" | 40 | 48.3 | Boiler auxiliary and drain line ends |
| 2" | 50 | 60.3 | Process header ends and test closures |
| 2 1/2" | 65 | 73.0 | Fire water and plant utility line ends |
| 3" | 80 | 88.9 | Steam and process supply line ends |
| 4" | 100 | 114.3 | Main utility and process header ends |
Threaded Cap Fittings Dimension Chart (ASME B16.11)
A is the overall length of the cap, D is the outside diameter, G is the minimum wall at the closed end, B is the minimum thread length and J is the length of the band. B and J are the same for both classes. All dimensions are in mm.
| NPS | Class 3000 A | Class 3000 D | Class 3000 G | Class 6000 A | Class 6000 D | Class 6000 G | Min Thread Length (B) | Band Length (J) |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 32 | 28 | 6.4 | 33 | 38 | 7.9 | 10.9 | 13.6 |
| 3/4" | 37 | 35 | 6.4 | 38 | 44 | 7.9 | 12.7 | 13.9 |
| 1" | 41 | 44 | 9.7 | 43 | 57 | 11.2 | 14.7 | 17.3 |
| 1 1/4" | 44 | 57 | 9.7 | 46 | 64 | 11.2 | 17.0 | 18.0 |
| 1 1/2" | 44 | 64 | 11.2 | 48 | 76 | 12.7 | 17.8 | 18.4 |
| 2" | 48 | 76 | 12.7 | 51 | 92 | 15.7 | 19.0 | 19.2 |
| 2 1/2" | 60 | 92 | 15.7 | 64 | 108 | 19.0 | 23.6 | 28.9 |
| 3" | 65 | 108 | 19.0 | 68 | 127 | 22.4 | 25.9 | 30.5 |
| 4" | 68 | 140 | 22.4 | – | – | – | 27.7 | 33.0 |
For other sizes and for special threads, we cut the cap to the ASME B16.11 table or to your drawing.
Threaded Cap Fittings Grades We Supply
Selecting the right material grade is important for the performance and service life of industrial piping systems. As a reliable Threaded Cap Fittings Supplier, we provide material options for different operating environments, from standard utility lines to demanding industrial processes. Our range covers carbon steel ASTM A105, low-temperature carbon steel ASTM A350 LF2, and alloy steel grades ASTM A182 F11, F22, and F91 for applications with specific temperature and pressure requirements.
For environments involving moisture, chemicals, or corrosive media, we offer stainless steel grades such as F304, F304L, F316, F316L, F321, and F347. Duplex F51, F53, and super duplex F55 are suitable options for applications requiring enhanced resistance to corrosion and chloride exposure. Specialised requirements can also be met with Inconel, Monel, and Hastelloy materials, subject to availability. Each grade is selected according to the application, project specifications, and required material properties.
Threaded Cap Fittings Standards and Certifications
Meeting recognised industry standards helps ensure that threaded cap fittings meet the technical requirements of industrial piping systems. As a Threaded Cap Fittings Supplier in India, we support specifications such as ASME B16.11 and BS 3799 for forged fittings, along with ASME B1.20.1 for NPT threads, ISO 7-1 for BSPT threads, and ISO 228-1 for BSPP threads. Material specifications include ASTM A105 for carbon steel, ASTM A182 for stainless, alloy, and duplex steel, and ASTM A350 for low-temperature applications, depending on the required grade.
Quality checks can include dimensional verification, thread gauging, material identification, and traceability documentation according to project needs. We can arrange EN 10204 3.1 material test certificates, chemical composition and mechanical test reports, and positive material identification (PMI) reports where required. EN 10204 3.2 certification and third-party inspection may also be coordinated based on the agreed specifications, helping support quality assurance and technical compliance throughout the supply process.
Threaded Cap Fittings Applications
- Instrumentation and Control: Threaded cap fittings close spare ports and the ends of impulse and sample lines on instrument panels.
- Hydraulic and Pneumatic Systems: Machine builders cap unused outlets and manifold ends with forged threaded caps.
- Oil and Gas Skids: Skid builders close small-bore vent, drain and test lines on wellhead and metering packages.
- Power Plants and Boilers: Alloy steel threaded caps seal steam sampling and auxiliary lines at high temperature.
- Chemical Processing: Stainless steel 316L threaded caps close dosing, sample and transfer lines handling corrosive fluids.
- Pump and Compressor Stations: Fitters cap seal flush, cooling and lubrication lines at equipment connections.
- Hydrostatic Testing: Crews screw caps onto small-bore headers to seal them during pressure tests, and many projects source them from a threaded cap fittings supplier in India like us.
- Fire Protection and Utilities: Contractors close compressed air, fuel and fire water manifold ends with threaded caps.
- Marine and Offshore: Shipyards fit threaded caps on engine room, deck and seawater service piping.
Threaded Cap Fittings Manufacturing Capacity and Export Capability
Our production operations in Vasai, near Mumbai, support monthly output of up to 100 tonnes of threaded cap fittings. We handle sizes from 1/8" to 4" across carbon steel, stainless steel, alloy steel, duplex steel, and other material grades. Integrated forging, heat treatment, machining, and threading processes help us coordinate production stages, maintain process control, and manage orders with varied technical specifications.
Our export operations can also handle shipments of up to 100 tonnes per month, serving destinations across 85+ countries. From small trial orders to full container shipments, we coordinate packaging, export paperwork, and dispatch through Nhava Sheva (JNPT) and Mundra ports. Our team manages shipment planning and documentation to support efficient logistics, secure cargo handling, and dependable delivery schedules for international customers.
Why Choose Us as Your Threaded Cap Fittings Manufacturer in India?
With 20+ years of experience in the steel industry, we understand the technical requirements of industrial piping systems. Our manufacturing and sourcing capabilities support projects across oil and gas, petrochemical, chemical processing, power generation, and marine industries. We offer threaded cap fittings in carbon steel, stainless steel, alloy steel, low-temperature steel, duplex, super duplex, and nickel alloys, with different pressure classes and thread specifications to suit project needs.
Our production and export capacity of up to 100 tonnes per month enables us to manage varied order quantities and supply requirements. We serve customers in 85+ countries and follow applicable manufacturing and quality standards, including ASME B16.11 and BS 3799, where relevant. Our ISO 9001:2015 and ISO 14001:2015 certifications, TÜV approval, and material traceability practices support our focus on quality and technical compliance.
We also provide material test certificates and inspection reports according to project requirements. Along with threaded cap fittings, our supply range includes elbows, tees, couplings, flanges, and other pipe fittings. We focus on competitive pricing, clear communication, dependable order processing, and delivery within agreed schedules to support industrial requirements across international markets.
Countries We Export To
We export threaded cap fittings to 85+ countries, supplying industrial markets across different regions worldwide. Our export network includes destinations in North America, Europe, the Middle East, Asia-Pacific, Africa, and South America, allowing us to serve a wide range of industrial applications and project requirements.
- North America: USA, Canada, Mexico
- Europe: UK, Germany, France, Italy, Netherlands, Spain
- Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain
- Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, Australia
- Africa: South Africa, Nigeria, Egypt, Kenya
- South America: Brazil, Chile, Peru
We coordinate international orders with attention to packaging, shipping documentation, and delivery schedules. Material test certificates and third-party inspections can be arranged according to project requirements. Our export process focuses on organised dispatch and reliable shipment handling to support customers across our global markets.