Parallel Thread Coupler Size Chart
AMCO Exports manufactures Parallel Thread Roll Coupler in standard sizes ranging from 16 mm to 40 mm for residential buildings, commercial structures, bridges, metro rail, industrial plants, dams, and infrastructure projects. The size chart below provides the standard dimensions and thread specifications for each coupler size.
| Parameter | 16 mm | 20 mm | 25 mm | 32 mm | 40 mm |
|---|---|---|---|---|---|
| Rebar Diameter | 16 mm | 20 mm | 25 mm | 32 mm | 40 mm |
| Steel Grade | EN8D | EN8D | EN8D | EN8D | EN8D |
| Internal Thread | Parallel Thread | Parallel Thread | Parallel Thread | Parallel Thread | Parallel Thread |
| Outside Diameter (±1 mm) | 28 mm | 28 mm | 40 mm | 50 mm | 63 mm |
| Ultimate Tensile Load | Equivalent to Parent Rebar | Equivalent to Parent Rebar | Equivalent to Parent Rebar | Equivalent to Parent Rebar | Equivalent to Parent Rebar |
| Coupler Length (±0.5 mm) | 40 mm | 40 mm | 60 mm | 67 mm | 80 mm |
| Thread Length on Rebar End | 20–22 mm | 24–26 mm | 30–32 mm | 35–36 mm | 40–42 mm |
| Number of Threads on Rebar | 11–12 | 12–13 | 13–14 | 17–18 | 20–21 |
| Thread Pitch | 2.0 mm | 2.5 mm | 3.0 mm | 3.5 mm | 4.0 mm |
| Applicable Standards | ACI 318-2005 / BS 8110 | ACI 318-2005 / BS 8110 | ACI 318-2005 / BS 8110 | ACI 318-2005 / BS 8110 | ACI 318-2005 / BS 8110 |
| Material | EN8D High-Strength Alloy Steel | ||||
| Manufacturing Process | Precision CNC Machined | ||||
| Thread Type | Parallel Roll Thread | ||||
| Surface Finish | Self Finish, Black Oxide, Oil Coated or Zinc Plated | ||||
| Applications | Buildings, Bridges, Metro Rail, Flyovers, Dams, Industrial Structures, Power Plants, Precast Concrete & Infrastructure Projects | ||||
| OEM Manufacturing | Available | ||||
| Country of Origin | India | ||||
| Manufacturer | AMCO Exports | ||||
Available Parallel Thread Coupler Sizes
AMCO Exports manufactures Parallel Thread Couplers in standard sizes from 16 mm to 40 mm for mechanically joining reinforcement bars in residential, commercial, industrial, bridge, metro rail, and infrastructure projects. Every coupler delivers precise thread engagement, excellent tensile strength, reliable performance, and long service life while reducing reinforcement congestion and eliminating conventional lap splicing.
16 mm Parallel Thread Coupler
The 16 mm Parallel Thread Roll Coupler provides a secure mechanical connection for 16 mm reinforcement bars used in residential buildings, slabs, beams, columns, footings, and general RCC construction. Precision-machined parallel threads ensure quick installation and dependable structural performance.
20 mm Parallel Thread Coupler
The 20 mm Parallel Thread Roll Coupler is suitable for commercial buildings, industrial structures, retaining walls, foundations, and medium-duty reinforced concrete projects requiring reliable mechanical reinforcement splicing.
25 mm Parallel Thread Coupler
The 25 mm Parallel Thread Coupler is widely used in bridge construction, metro rail, flyovers, elevated corridors, precast concrete, and heavy reinforced concrete structures where full-strength mechanical joints are essential.
32 mm Parallel Thread Coupler
The 32 mm Parallel Thread Coupler is designed for dams, tunnels, infrastructure projects, power plants, heavy foundations, marine structures, and industrial construction requiring superior tensile performance.
40 mm Parallel Thread Coupler
The 40 mm Parallel Thread Roll Coupler is manufactured for bridge piers, heavy infrastructure, hydroelectric projects, industrial plants, and large-scale civil engineering works where high-load reinforcement connections are required.
Key Features of Parallel Thread Couplers
- Manufactured from premium EN8D high-strength alloy steel
- Precision CNC-machined parallel threads for accurate engagement
- Full tensile strength equivalent to the parent reinforcement bar
- Reduces reinforcement congestion and steel consumption
- Eliminates conventional lap splicing
- Improves concrete flow and compaction
- Fast and easy installation on site
- Available in 16 mm, 20 mm, 25 mm, 32 mm, and 40 mm sizes
- Suitable for Fe500, Fe500D, Fe550 and Fe600 reinforcement bars
- OEM manufacturing and private labeling available
- Bulk production capacity with export-grade packaging
- PAN India supply and worldwide export support
Applications of Parallel Thread Couplers
High-Rise Building Construction
Parallel Thread Couplers create strong reinforcement joints in columns, beams, slabs, shear walls, foundations, and core walls of high-rise buildings.
Bridge & Infrastructure Projects
Engineers use these couplers in bridges, highways, metro rail projects, flyovers, tunnels, dams, elevated corridors, and other infrastructure developments requiring dependable reinforcement continuity.
Industrial Construction
Manufacturing plants, refineries, petrochemical facilities, warehouses, steel plants, and heavy industrial buildings rely on Parallel Thread Couplers for durable reinforcement connections.
Power Plants & Energy Projects
Thermal power plants, hydroelectric projects, nuclear facilities, wind energy foundations, and transmission infrastructure use these mechanical splices to achieve reliable structural performance.
Precast Concrete Construction
Parallel Thread Couplers simplify reinforcement connections in precast columns, beams, wall panels, bridge segments, tunnel linings, and modular construction systems.
Industries We Serve
- Residential Construction
- Commercial Buildings
- Industrial Construction
- Bridge Construction
- Metro Rail Projects
- Highway Infrastructure
- Power Plants
- Dams & Hydroelectric Projects
- Precast Concrete Manufacturing
- Oil & Gas Industry
- Marine Construction
- Civil Engineering Projects
Why Choose AMCO Exports for Parallel Thread Couplers?
AMCO Exports is a trusted manufacturer and exporter of Parallel Thread Roll Couplers for construction and infrastructure projects across India and international markets. We manufacture precision-engineered mechanical splices that deliver reliable performance, superior tensile strength, and long service life while complying with project specifications and international quality standards.
- 35+ years of manufacturing experience
- Premium EN8D high-strength alloy steel
- Precision CNC-machined parallel threads
- Strict quality inspection before dispatch
- High tensile strength equivalent to the parent reinforcement bar
- Available in standard and customized sizes
- OEM manufacturing and private labeling
- Bulk production capacity for infrastructure projects
- Export-grade packaging for international shipments
- PAN India supply with worldwide export support
Advantages of Using Parallel Thread Couplers
Eliminates Conventional Lap Splicing
Parallel Thread Couplers replace long lap splices, helping engineers reduce reinforcement congestion and improve structural efficiency.
Maintains Full Tensile Strength
Precision-machined parallel threads transfer loads efficiently while maintaining tensile performance equivalent to the parent reinforcement bar.
Reduces Steel Consumption
Mechanical splicing minimizes reinforcement overlap, helping contractors optimize steel usage and reduce overall construction costs.
Improves Concrete Placement
Reduced reinforcement congestion allows concrete to flow freely, improving compaction and minimizing honeycombing.
Faster Installation
Simple threaded installation reduces labour time and increases productivity on construction sites.
Related Rebar Couplers
AMCO Exports manufactures a complete range of mechanical rebar splicing solutions for residential, commercial, industrial, and infrastructure construction.
- Threaded Rebar Coupler – Standard threaded mechanical couplers for joining reinforcement bars of the same diameter.
- Reducer Rebar Coupler – Designed for connecting reinforcement bars of different diameters.
- MBT Rebar Coupler – Ideal for reinforcement bars where threading or bar rotation is not possible.
Browse our complete range of reinforcement splicing solutions to select the right mechanical coupler for your project requirements.
Supply Across India
AMCO Exports supplies Parallel Thread Couplers to contractors, builders, infrastructure companies, precast manufacturers, and government projects across India, including Mumbai, Delhi, Bengaluru, Chennai, Hyderabad, Kolkata, Pune, Ahmedabad, Surat, Jaipur, Chandigarh, Lucknow, Nagpur, Indore, Kochi, Bhubaneswar, Patna, Raipur, Jalandhar, Ludhiana, and other major construction hubs.
Export Markets
AMCO Exports exports Parallel Thread Couplers to the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Nepal, Bangladesh, Sri Lanka, Kenya, Tanzania, Nigeria, South Africa, Malaysia, Singapore, Indonesia, Vietnam, Maldives, and other international markets with OEM manufacturing, export documentation, and secure export packaging.
Packaging & OEM Manufacturing
Export Packaging
Products are packed in cartons, gunny bags, wooden pallets, or customized export packaging to ensure safe transportation and international shipping.
OEM & Private Label Manufacturing
AMCO Exports provides OEM manufacturing, customized dimensions, laser marking, private branding, customized packaging, and project-specific production for domestic and international customers.
Contact AMCO Exports
Looking for premium-quality Parallel Thread Couplers for your construction or infrastructure project? Contact our team for factory pricing, technical assistance, OEM manufacturing, and export inquiries.
📞 Call / WhatsApp:
+91 98888 82322
📧 Email:
amcosales1@gmail.com
🌐 Website:
www.amcoexports.com
- Factory Direct Pricing
- Bulk Orders Welcome
- Fast Production & Dispatch
- Worldwide Export Support
- OEM Manufacturing Available
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Frequently Asked Questions About Parallel Thread Couplers
What is a Parallel Thread Coupler?
A Parallel Thread Coupler is a mechanical splice used to connect two reinforcement bars with precision-machined parallel threads. It provides full tensile strength, eliminates lap splicing, and ensures continuous load transfer in reinforced concrete structures.
What sizes of Parallel Thread Couplers are available?
AMCO Exports manufactures Parallel Thread Couplers in 16 mm, 20 mm, 25 mm, 32 mm, and 40 mm sizes. Custom sizes are also available to meet specific project requirements.
What are the advantages of using Parallel Thread Couplers?
Parallel Thread Couplers reduce steel consumption, eliminate conventional lap splicing, improve concrete flow, simplify reinforcement detailing, speed up installation, and provide tensile strength equivalent to the parent reinforcement bar.
Where are Parallel Thread Couplers used?
Parallel Thread Couplers are widely used in residential buildings, commercial complexes, bridges, metro rail projects, highways, dams, industrial plants, power stations, precast concrete, and other infrastructure construction projects.
Do you supply Parallel Thread Couplers in bulk and export worldwide?
Yes. AMCO Exports supplies Parallel Thread Couplers in bulk across India and exports to the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Nepal, Bangladesh, Kenya, Tanzania, Nigeria, South Africa, and many other international markets with OEM manufacturing and export-grade packaging.
