Bronze U Bolts, Bronze U Bolt Clamps, U Bolt Hardware
Bronze U Bolts | Bronze U Bolt Hardware
We are one of the leading manufacturers and exporters of Bronze U Bolts and Bronze U Bolt Hardware from India. We have been supplying precision-engineered Bronze fasteners to the world market for many decades. Known for their excellent corrosion resistance, conductivity, and mechanical strength, our Bronze U Bolts are widely used in electrical, marine, and industrial environments where standard steel fasteners would fail. With over 30 years of global export experience, we serve OEMs, contractors, and distribution networks with custom sizes, short lead times, and personalized support. Our facility integrates modern wire forming, thread rolling, and forging technologies to deliver consistent quality in every shipment.
Overview
Bronze U Bolts are essential fastening components used to secure pipes, cables, and rods to surfaces or structural frames. Made by cold bending Bronze round wire and threading by rolling, these U bolts are paired with Bronze cold-forged nuts and Bronze pressed washers made from the same Bronze alloy or compatible metals. Their unique combination of strength and resistance to corrosion (including galvanic and saltwater environments) makes them ideal for harsh conditions. We are specialist in Bronze casting and can offer Bronze Hotline clamps, Bronze vise Connectors , Bronze Transformer spade terminals.
Material Grades and Specifications
We use high-quality Bronze alloys conforming to international standards:
| Grade | Composition | Standard Equivalent | Application Use |
|---|---|---|---|
| Phosphor Bronze | Cu 88-90%, Sn 9-11%, P <0.5% | ASTM B139, IS 292 | Electrical and mechanical fastening |
| Aluminium Bronze | Cu 88-91%, Al 8-10% | ASTM B150, BS 2872 CA 104 | Marine, pumps, offshore structures |
| Silicon Bronze | Cu 94-96%, Si 2-4% | ASTM B103, UNS C65500 | High-strength electrical and plumbing fasteners |
Manufacturing Process
- Wire Forming: High-quality Bronze wire is straightened and cut to length.
- Bending: Precision dies are used to cold-form the U shape to exact dimensions.
- Thread Rolling: Threads are rolled (not cut) for higher strength and surface finish.
- Nuts: Manufactured by cold forging and threading.
- Washers: Produced by blanking and pressing operations.
Machinery Used
- CNC Wire Benders and Hydraulic U-Bend Forming Machines
- Thread Rolling Machines (ISO/UNF/BSP/NPT Standards)
- Cold Forging Presses for Nut Formation
- Hydraulic Presses for Washer Blanking
- Thread Gauges, Profile Projectors, Hardness and Tensile Testers
Finish Options
- Natural Bright Bronze Finish (As Rolled)
- Polished Surface (For Electrical Applications)
- Anti-Oxidation Coating on Request
Industries Using Bronze U Bolts
Our Bronze U Bolts are utilized in a variety of sectors:
- Electrical Grounding Systems and Panels
- Marine Structures and Boat Frames
- HVAC Piping Systems
- Telecommunications Infrastructure
- Chemical and Food Processing Plants
- Railway and Locomotive Equipment
Tolerances and Performance Metrics
| Parameter | Typical Tolerance / Value |
| Thread Pitch Accuracy | ±0.1 mm (ISO Metric or UNC/UNF) |
| Dimensional Accuracy | ±0.25 mm on leg length and bend radius |
| Tensile Strength (Min) | 400 – 600 MPa depending on alloy |
| Thread Pull-Out Strength | Verified by in-house torque & tensile testing |
| Salt Spray Resistance | > 500 hrs (uncoated), > 1000 hrs (coated) |
Size and Dimensional Chart
| U Bolt Size | Wire Diameter | Inside Width (A) | Leg Length (B) | Thread Length (C) | Nut Size | Washer OD |
| 1/4″ | 6.35 mm | 25 mm | 50 mm | 25 mm | 1/4″ UNC | 14 mm |
| 3/8″ | 9.53 mm | 38 mm | 63 mm | 30 mm | 3/8″ UNC | 20 mm |
| 1/2″ | 12.7 mm | 50 mm | 76 mm | 38 mm | 1/2″ UNC | 25 mm |
| Custom | As per drawing | As required | As required | As required | Any | Any |
Turnaround Time
Our standard delivery time is 4–6 weeks from order confirmation. Express manufacturing for small batch or repeat orders can be done in 2–3 weeks with air shipment. All shipments are backed by pre-shipment inspection, dimensional checks, and complete export documentation.
Why Choose Us
With over three decades of experience in Bronze U bolts, Bronze Nuts, Bronze washers and Bronze fasteners, we offer unparalleled service:
- Superior corrosion-resistant products using certified alloys
- Low MOQs and flexible production planning
- Dedicated engineering team for drawings and customization
- Fast response and transparent communication
- Custom branding and packaging for OEM clients
- Exporting to 30+ countries with consistent repeat orders
Frequently Asked Questions (FAQs)
- Are your Bronze U Bolts suitable for marine applications?
- Yes, especially Aluminium Bronze and Silicon Bronze variants.
- Can I get custom thread types or lengths?
- Absolutely. We support NPT, BSP, UNC, UNF, and custom thread pitches.
- Do you offer plating or coating?
- Yes, anti-oxidation coatings are available on request.
- Can I order U Bolts with special washer and nut designs?
- Yes, we offer full customization including locking washers or slotted nuts.
- What is your MOQ?
- As low as 100 pieces for standard sizes; custom MOQs for non-standard items.
- Do you supply MTC or test reports?
- Yes, including tensile, hardness, and salt spray certificates.
- Are your products RoHS and REACH compliant?
- Yes, we ensure compliance for all materials and processes.
- Can I track my order?
- Yes, tracking details and production updates are shared proactively.
- Do you support third-party inspections?
- Yes, with SGS, TUV, BV, or client-nominated agencies.
- Can I receive samples before bulk order?
- Yes, samples are shipped by courier with test certificates.
Customer Testimonial
“We’ve been sourcing Bronze U bolts from this company for our marina installations in Florida for the past 5 years. The quality is consistent, threads are clean, and the packaging is excellent. They’ve even helped us reduce lead times. Highly recommended!” — Daniel K.,  USA
Glossary of Terms
- U Bolt: A U-shaped bolt with threads on both ends used for clamping
- Roll Threading: Thread forming method without cutting, improves strength
- Cold Forging: High-pressure deformation at room temperature to form fasteners
- Pressed Washer: Washer formed by stamping a metal sheet using a die
- Galvanic Corrosion: Electrochemical reaction between dissimilar metals
Packaging and Shipping
Each U Bolt set (bolt + 2 nuts + 2 washers) is individually poly-bagged or bulk packed as per client need. Export cartons with part numbers, batch info, and optional barcoding. Wooden crates and pallets for large orders. Air and sea freight options available with full shipping support.
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