Silicon Bronze Screws & Bronze Machine Screws

Comprehensive Overview of Premium Bronze Fasteners

We are a leading manufacturer and global exporter of Silicon Bronze Screws and Bronze Machine Screws, serving the marine, architectural, and heavy industrial sectors for over three decades. Our state-of-the-art cold heading and thread rolling facility specializes in producing high-integrity bronze fasteners from alloys renowned for their exceptional corrosion resistance and mechanical strength. We primarily utilize C65500 High Silicon Bronze A for its superior performance in saltwater environments and C93200 Bearing Bronze for general-purpose, high-strength machine screw applications. Our comprehensive range includes everything from Silicon Bronze Wood Screws and Self-Tapping Screws to precision Bronze Socket Head Cap Screws and Hex Bolts, all manufactured under a stringent quality management system compliant with ISO 9001:2015.

Silicon Bronze Screws (C65500) – The Ultimate Marine Grade Fastener

Silicon Bronze Screws, primarily made from alloy C65500, represent the gold standard for fasteners in marine and other highly corrosive environments. This alloy offers a unique combination of very high corrosion resistance, excellent strength, and good machinability, making it the preferred choice for boat building, dock construction, and architectural applications.

Applications of Silicon Bronze Screws

• Marine & Shipbuilding: Hull fastenings, deck planking, wooden boat building, and saltwater hardware.

• Architectural & Restoration: Historic building restoration, ornamental metalwork, and permanent outdoor structures.

• Chemical Processing: Fasteners for equipment and structures exposed to corrosive chemicals and fumes.

• Water Treatment Plants: Fasteners in contact with potable water and treatment chemicals.

• Pulp & Paper Industry: Equipment in corrosive bleaching and chemical recovery areas.

Silicon Bronze Alloy Specifications (C65500)

Silicon Bronze Screw Types & Specifications

Bronze Machine Screws – High-Strength, Corrosion Resistant Fastening

Our Bronze Machine Screws are precision-engineered for applications requiring a fastener that mates with a pre-tapped hole or nut. Manufactured from various bronze alloys, they offer excellent wear resistance, good fatigue strength, and corrosion resistance, making them ideal for machinery, pumps, valves, and electrical equipment.

Applications of Bronze Machine Screws

• Pump & Valve Manufacturing: Assembly of pump housings, valve bodies, and fluid handling equipment.

• Electrical Machinery: Fasteners for motors, generators, and control panels where non-magnetic properties are essential.

• Food & Beverage Industry: Equipment assembly where corrosion resistance and non-toxicity are required.

• Industrial Machinery: General assembly in corrosive atmospheres or where galling of steel fasteners is a concern.

• Automotive & Aerospace: Non-magnetic and corrosion-resistant fasteners in specific subsystems.

Bronze Alloy Specifications for Machine Screws

Bronze Machine Screw Technical Specifications

Manufacturing Processes & Quality Control

Our bronze screws are manufactured through a meticulous process to ensure dimensional accuracy and material integrity:

1. Wire Drawing: High-quality bronze wire is drawn to precise diameters.

2. Cold Heading: The screw blank is formed under high pressure in multi-station cold heading machines to create the head and shank.

3. Thread Rolling: Precise threads are formed by rolling the blank between dies, creating a stronger thread than cutting.

4. Heat Treatment (if required): Certain alloys may undergo heat treatment to achieve desired mechanical properties.

5. Deburring & Finishing: Screws are tumbled to remove sharp edges.

6. Quality Inspection: 100% dimensional checks, sample lot testing for mechanical properties, and visual inspection.

7. Packaging: Packed in corrosion-inhibiting packaging for export.

Quality Assurance Tests:

• Dimensional Verification: Go/No-Go gauges for threads, micrometer checks for head dimensions.

• Proof Load Testing: Sample screws are tested to a specified proof load without permanent deformation.

• Material Certification: Mill Test Certificates (MTC) provided for all raw material lots, confirming alloy composition.

• Salt Spray Testing: Periodic corrosion resistance testing per ASTM B117 standards.

Frequently Asked Questions (FAQ)

Q1: What makes Silicon Bronze (C65500) the best choice for marine applications?
Silicon Bronze offers an unmatched combination of very high corrosion resistance (superior to other bronze alloys in seawater), high strength, and excellent resistance to stress corrosion cracking. It is the benchmark material for critical marine fastenings like wooden boat hulls.

Q2: Are bronze machine screws stronger than steel screws?
While high-strength steel has a higher ultimate tensile strength, many bronze alloys like C95400 and C63000 are stronger than mild steel (Grade 2 or A307) and offer sufficient strength for most industrial applications. Their key advantage is maintaining this strength while being completely corrosion-resistant and non-sparking.

Q3: Can you supply bronze screws with different drive types and head styles?
Yes. We manufacture a wide variety of drives (Slotted, Phillips, Pozidriv, Square, and Socket) and head styles (Flat, Round, Pan, Oval, Hex, and Hex Washer). We can also produce custom configurations based on your drawings.

Q4: What is the difference between a bronze wood screw and a bronze machine screw?
A wood screw has a tapered shank with a sharp point and coarse threads designed to cut into wood and create its own mating thread. A machine screw has a uniform shank diameter, a blunt end, and finer threads designed to screw into a pre-tapped hole or a nut.

Q5: Do you offer plating on bronze screws?
Typically, bronze screws are used bare due to their inherent corrosion resistance. However, we can provide electro-tin or nickel plating for specific aesthetic requirements or to prevent galvanic corrosion when mating with certain metals like aluminum.

Why Choose Our Bronze Screws?

• Specialized Alloy Expertise: Deep knowledge in selecting the right bronze alloy (C65500, C93200, C95400) for your specific application and environment.

• Precision Cold Forming: Our cold heading and thread rolling process ensures stronger, more precise, and consistent screws compared to machined alternatives.

• Complete Traceability: From certified bronze wire rod to finished screws, we maintain full traceability and provide all necessary documentation.

• Wide Range & Customization: We stock a wide range of standard sizes and also excel at producing custom-length, non-standard, and specialty head type screws.

• Competitive Global Pricing: Manufacturing in India allows us to offer high-quality bronze fasteners at highly competitive prices without compromising on quality.

Call to Action – Contact Us Today

Secure your project with the reliability of premium bronze fasteners. Contact us for a prompt quote or technical consultation.

• Request a Quote: Email your requirements, specifications, and quantities to sales@jambrass.com for a competitive quotation within 24 hours.

• Call Us Directly: Speak with our fastener experts at +91-22-43449300 / +91-22-43449323 (Monday-Saturday, 9:00 AM – 6:00 PM IST).

• Visit Our Offices:

  • Office Address: 1406, 14th Floor, Dalamal Tower, Nariman Point, Mumbai – 400021, Maharashtra, India

  • Factory Address: Plot 10B, GIDC Industrial Estate, Shanker Tekari, Udyognagar, Jamnagar, Gujarat, India – 361004

• Samples Available: Contact us to request samples for your evaluation and testing.

We look forward to providing you with the highest quality silicon bronze and bronze machine screws for your most demanding applications.