Process & Hydraulic Fittings

Stainless Steel Extension Nipple Manufacturer

High-quality Stainless Steel 304 extension nipples featuring a male-to-female threaded configuration. Designed to extend ports, bypass clearance obstacles, and space pipe fittings perfectly within complex hydraulic, pneumatic, and industrial fluid systems. Precision CNC turned to a strict ±0.02mm tolerance for leak-free NPT or BSP connections. Manufactured in Mumbai, exported globally.

Male-Female Extension
Corrosion Resistant SS 304
Leak-Free Thread Sealing
BSP & NPT Configurations
±0.02mm Machining Precision
High Pressure Rated
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Since 1975 ISO Quality Standards Global B2B Supply
SS 304 Extension Nipple Male Female Stainless Steel Threaded Extension CNC Turned Pipe Extension Hydraulic Extension Fitting Inspection
Extension Nipple
Extension Nipple
Male-Female Threads
M-F Threads
Side Profile
Side Profile
Natural Finish
Natural Finish
SS 304
Premium Alloy
±0.02
mm Thread Precision
100%
Leak-Proof Design
40+
Countries Exported To
Product Overview

High-Performance Pipe Extension Fittings

In hydraulic manifolds, pneumatic control boards, and dense industrial piping networks, engineers frequently encounter clearance issues. Bulky gauges, valves, or T-fittings can clash with adjacent components. The Male-Female Extension Nipple is the precise solution to this problem. It elevates the mounting port, providing the necessary clearance for assembly without altering the pipe size or thread type.

At OM Engineering Works, we manufacture these critical adapters using solid hex or round Stainless Steel 304 bar stock. Utilizing our advanced CNC turning centers, we machine the internal female threads and the external male threads in a single setup. This ensures absolute concentricity and strict ±0.02mm tolerances, which are mandatory for NPT and BSP threads to wedge together and create a leak-free mechanical seal under high pressure.

Operating from our facility in Bhayandar, Mumbai, we cater to B2B clients who require highly reliable stainless steel fittings. Unlike cheap, cast iron or plated extensions that rust internally and contaminate fluid systems, our SS 304 extensions offer unparalleled longevity, chemical resistance, and heavy-duty structural integrity.

Key Advantages of Our SS 304 Extension Nipples:

  • Clearance Optimization: Available in custom lengths to provide exact spacing to bypass structural obstacles and bulky instrumentation.
  • Precision Sealing: CNC single-point threading guarantees smooth crests and roots, preventing thread galling and ensuring a deep, secure seal when installed with thread tape/sealant.
  • Robust SS 304 Construction: Impervious to internal moisture, cooling fluids, and harsh industrial environments, ensuring a long, maintenance-free service life.
  • Unrestricted Flow: The internal bores are machined smooth to perfectly match the internal diameter of the connecting pipes, minimizing turbulence and pressure drop.

Why Source from OM Engineering Works?

  • Scalable Production: Our automated Traub and CNC infrastructure allows us to produce high volumes of extension nipples rapidly, making us an ideal OEM partner.
  • Custom Lengths & Profiles: We can manufacture hex-bodied extensions (for wrench installation) or round-bodied extensions based entirely on your CAD requirements.
  • Material Traceability: Every batch is supplied with EN 10204 3.1 Material Test Certificates (MTC) proving the authentic chemical composition of the stainless steel.
Technical Details

Extension Nipple — Specifications

Dimensional & Threading Specs

Configuration Type Male to Female (M-F) Extension
Thread Standards NPT, BSPT, BSPP (Metric available on request)
Thread Sizes 1/8", 1/4", 3/8", 1/2", 3/4", 1" (Standard)
Extension Lengths 20mm to 150mm (Custom lengths manufactured)
Body Profile Hexagonal Body (Standard) or Round Body
Dimensional Tolerance ±0.02mm (Critical for taper thread sealing)
Manufacturing Process CNC Turning, Single Point Threading, Deep Boring
Pressure Rating Suitable for medium to high-pressure lines (up to 6000 PSI depending on size)

Material & Surface Specifications

Primary Material Stainless Steel 304 (SS 304 / 1.4301)
Alternative Materials SS 316/316L, Brass C360, Carbon Steel (On request)
Standard Finish Natural SS Machined (Ultrasonically Cleaned)
Corrosion Resistance Excellent resistance to water, oils, and general industrial environments
Operating Temperature -320°F to 800°F (-196°C to 426°C) standard range for SS 304
Wall Thickness Heavy-duty Schedule 80 or Schedule 40 equivalent
Compliance Meets ASME B1.20.1 (NPT) and ISO 7-1 (BSP) standards
Certifications Material Test Certificates (MTC) provided with batches
Our Expertise

How We Manufacture Pipe Extensions

01
Solid Bar Stock Sourcing

We source heavy-duty SS 304 hex or round bar stock from certified mills. We avoid using welded pipes for extensions, as solid bar machining guarantees maximum burst pressure resistance and zero internal porosity.

02
High-Precision CNC Turning

The stainless steel bars are processed in our advanced CNC turning centers. The exterior profile is turned to the correct diameter, and a deep, smooth internal bore is drilled to create the fluid pathway.

03
Dual Threading (Male & Female)

This is the most critical step. We use single-point CNC threading tools to cut the external male threads and the internal female threads. For tapered threads like NPT, maintaining a ±0.02mm tolerance ensures that the threads wedge together perfectly to create a leak-proof seal without cross-threading.

04
Hex Milling (For Round Stock)

If the extension is manufactured from round bar stock, the component is transferred to a milling station where precision wrench flats (hex profiles) are cut into the body. This allows technicians to apply secure torque during installation.

05
Deburring & Ultrasonic Cleaning

Stainless steel machining can leave micro-burrs. The fittings are thoroughly deburred inside and out. They are then submerged in an industrial ultrasonic cleaning bath to remove all cutting fluids, ensuring the internal bore is perfectly clean for sensitive hydraulic systems.

06
Thread Gauging & Export Packaging

We verify the internal and external threads using calibrated L1 plug and ring gauges. Approved extension nipples are fitted with thread protectors and securely packed in heavy-duty cartons for global shipment.

Machines & Equipment

  • Advanced CNC Turning Centers
  • Traub Automats (For high-volume runs)
  • Carbide Threading Tooling
  • CNC Vertical Milling Machines
  • Ultrasonic Cleaning Stations

Quality Control

  • NPT/BSP Thread Ring & Plug Gauges
  • Digital Calipers & Micrometers
  • Visual Thread Inspection under Magnification
  • First Article Inspection (FAI)
  • Material Test Certificates (MTC)
Material Options

Stainless Steel for Process Piping

Stainless Steel 304 (SS 304)

Properties: The industry standard for heavy-duty process fittings. SS 304 contains 18% chromium and 8% nickel, providing an excellent natural barrier against rust, oxidation, and mild chemicals without the need for exterior plating. It offers immense structural strength to withstand high-pressure fluid environments.

Best For: Standard hydraulic systems, pneumatic manifolds, water treatment facilities, and general factory fluid transfer lines.

Standards:

UNS S30400 EN 1.4301 AISI 304

Stainless Steel 316 (SS 316) - On Request

Properties: For extreme environments, SS 316 includes the addition of molybdenum, which drastically increases the alloy's resistance to pitting and crevice corrosion, particularly in chloride-rich (saline) environments.

Best For: Marine hydraulics, offshore oil platforms, aggressive chemical processing, and pharmaceutical cleanrooms.

Standards:

UNS S31600 EN 1.4401 AISI 316
Applications

Industries Using Extension Adapters

Hydraulic Manifolds

Providing essential clearance for bulky directional control valves and high-pressure sensors on dense machinery.

Industrial Pneumatics

Spacing air regulators, lubricators, and pressure gauges off crowded factory compressor control boards.

Chemical Processing

Rust-free SS 304 extensions ensuring pure fluid transfer between mixing tanks and processing pumps.

Water & Plumbing

Heavy-duty, leak-proof extensions used to bypass wall obstacles in commercial filtration and RO water plants.

Product Comparison

CNC Machined Extenders vs Cast Brass

Feature / Capability OM Engineering (SS 304 Solid) Standard Cast Brass Fittings
Structural Strength High Burst Pressure (Solid Machined) Low to Medium (Prone to cracking under stress)
Corrosion Resistance Exceptional (Immune to industrial chemicals) Can degrade/dezincify in certain water conditions
Thread Quality CNC Single-Point Cut (±0.02mm) Often rough-cut, prone to cross-threading
Torque Capability Hex body handles heavy wrench torque Soft metal rounds off easily during installation
Material Traceability 100% Verified SS 304 with MTC Unknown scrap metal percentages
Common Questions

Extension Nipples — FAQs

Extension nipples are problem solvers. When assembling a hydraulic manifold or plumbing a control board, you often find that two components (like a valve and a gauge) bump into each other, preventing you from threading them in fully. A male-female extension nipple spaces the component outward, giving it the necessary clearance to thread into the port without altering the pipe size.

NPT (National Pipe Taper) is common in North America and features a 60-degree thread angle with flattened peaks. BSP (British Standard Pipe) is standard in Europe/Asia and features a 55-degree angle with rounded peaks. They are not compatible. We manufacture extensions in both standards based on your system requirements.

Stainless steel forms a protective oxide layer that stops rust. However, when tightening two SS threads against each other under friction, this layer can break down, causing the raw metal underneath to cold-weld or "gall." We mitigate this by CNC machining ultra-smooth, burr-free threads. We also strongly recommend applying a high-quality PTFE thread sealant paste or tape during installation to lubricate the connection.

Yes. While standard lengths are available, our CNC turning capability allows us to manufacture extension nipples to your exact custom length specifications. Whether you need a short 20mm spacer or a long 150mm extension, we can produce it accurately.

Absolutely. Industrial and chemical applications demand material certainty. Every batch of SS 304 extensions manufactured in our Mumbai facility is accompanied by an EN 10204 3.1 Material Test Certificate, proving the exact chemical composition of the steel used.
Related Capabilities

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Custom CNC turning services for specialized fluid control valves, manifold components, and high-pressure hydraulic spools.

High-Volume Traub Machining

Automated Traub machining for rapidly producing thousands of specialized nuts, adapters, and pipe plugs with repeatable accuracy.

Need Precision SS 304 Extension Nipples?

Share your NPT/BSP thread sizes, required lengths, or batch quantities for a rapid B2B quote. We guarantee ±0.02mm tolerances and supply verified SS 304 with full MTCs. Mumbai-based manufacturing, globally exported.

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Contact Info

24/A, Shreenath IND Estate, Navghar Rd, Bhayandar(E), 401105

+91 9324078101

omeprecisions@gmail.com

Mon - Sat: 09:00 AM - 09:00 PM

Our Services

Precision Turned Components Pipe & Tube Fittings Custom Components Rapid Prototyping & Small-Batch Traub Machining Job Work

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Why Choose Us

3rd Generation Engineering Legacy. Delivering precision since 1975.

±0.02mm CNC Tolerances

Verified SS 304 with MTC

Global OEM Export Experience

ISO Certified Quality Control

Recognized supplier on IndiaMART | ExportersIndia

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