1/4-20 Brass Hex Bolt – Premium Corrosion-Resistant Fastener for Industrial Applications

1. Product Overview

Our 1/4-20 brass hex bolt is a high-quality, precision-engineered fastener designed for demanding environments where corrosion resistance, electrical conductivity, and aesthetic appeal are paramount. Manufactured from lead-free naval brass (C46400 or equivalent), this bolt features a standard 1/4-inch diameter with 20 threads per inch (UNC coarse thread). The hexagonal head provides superior torque transfer during installation, while the brass alloy offers exceptional durability in marine, electrical, and decorative applications.

This bolt is ideal for OEM manufacturers, marine engineers, electrical contractors, and hardware distributors seeking a reliable, non-magnetic alternative to steel fasteners. Each bolt undergoes rigorous quality control to ensure consistent thread pitch, head dimensions, and material composition, meeting ASTM B16 and SAE J429 specifications.

2. Key Features

• Premium Brass Alloy: Made from high-grade C46400 naval brass, offering excellent resistance to saltwater, humidity, and chemical corrosion.
• UNC Coarse Thread (1/4-20): Standard unified coarse thread ensures compatibility with common nuts, washers, and tapped holes across industries.
• Non-Magnetic & Spark-Resistant: Ideal for sensitive electronic equipment, marine environments, and explosive atmospheres where ferrous metals are prohibited.
• Full Hex Head Design: Precision-formed hexagonal head (3/8" across flats) provides maximum wrench grip, reducing cam-out and installation torque loss.
• Lead-Free Compliance: Meets RoHS, REACH, and California Proposition 65 standards for safe use in potable water systems and food processing equipment.
• Corrosion-Resistant Finish: Natural brass patina or optional clear lacquer coating prevents tarnishing and maintains aesthetic appearance over time.
• Consistent Dimensional Accuracy: CNC-machined threads with ±0.002" tolerance ensure reliable mating with standard 1/4-20 nuts and washers.

3. Technical Specifications

4. Application Scenarios

• Marine & Offshore Equipment: Ideal for boat fittings, dock hardware, underwater lighting fixtures, and saltwater pump assemblies where steel bolts would corrode rapidly.
• Electrical & Electronics: Used in grounding terminals, bus bars, switchgear enclosures, and transformer connections due to brass's excellent electrical conductivity (28% IACS).
• Plumbing & Potable Water Systems: Safe for drinking water applications – commonly found in valve assemblies, faucet mounts, water filter housings, and pipe clamps.
• Architectural & Decorative Hardware: Preferred for handrails, gate hinges, door handles, and marine-grade railings where brass's golden appearance adds aesthetic value.
• Food Processing Machinery: Non-sparking and corrosion-resistant properties make it suitable for breweries, dairy equipment, and food conveyor systems.
• Renewable Energy: Used in solar panel mounting frames, wind turbine control boxes, and hydroelectric generator components.

5. Advantages

• Superior Corrosion Resistance: Unlike zinc-plated steel or stainless steel, brass forms a protective patina that self-heals minor surface scratches, extending service life in harsh environments.
• Excellent Thermal & Electrical Conductivity: Brass conducts heat and electricity significantly better than steel or aluminum, reducing overheating in electrical connections.
• Non-Magnetic & Spark-Free: Essential for MRI rooms, aerospace components, and hazardous location equipment (Class I, Division 2).
• Easy Machinability: Brass's softness reduces tool wear during installation, while the 1/4-20 UNC thread provides strong holding power without galling.
• Aesthetic Appeal: The warm golden tone of brass complements wood, glass, and stainless steel in visible applications, eliminating the need for painting or plating.
• Recyclable & Sustainable: 100% recyclable brass alloy supports circular economy initiatives and reduces environmental impact compared to disposable fasteners.

6. Why Choose Us

• ISO 9001:2015 Certified Manufacturing: Our facility in [City, Country] maintains strict quality control from raw material sourcing to final packaging.
• In-House Testing Lab: Each batch of 1/4-20 brass hex bolts is tested for tensile strength, hardness, thread accuracy, and chemical composition using spectrometers and torque testers.
• Custom Manufacturing: We offer custom lengths (0.5" to 6"), special head markings, and batch heat treatment for specific OEM requirements.
• Global Logistics Network: Inventory of over 500,000 units in stock ensures 48-hour shipping for standard sizes. Express DDP/FOB terms available.
• Competitive OEM Pricing: Factory-direct pricing with volume discounts for orders above 10,000 pieces. No minimum order quantity (MOQ) for standard sizes.
• Technical Support: Our engineering team provides free consultation on thread selection, torque specifications, and material compatibility for your project.

7. FAQ

Q1: What is the difference between a 1/4-20 brass hex bolt and a stainless steel one?

A: Brass offers superior electrical conductivity (28% IACS vs. 2.5% for 304SS), non-magnetic properties, and better corrosion resistance in saltwater. However, stainless steel (316 grade) has higher tensile strength (70,000+ psi) and is more cost-effective for structural applications.

Q2: Can this bolt be used in potable water systems?

A: Yes, our lead-free C46400 naval brass complies with NSF/ANSI 61 and California Proposition 65, making it safe for drinking water applications up to 180°F.

Q3: What torque should I apply for a 1/4-20 brass hex bolt?

A: Recommended tightening torque is 5-7 ft-lbs (6.8-9.5 Nm) for dry threads and 4-6 ft-lbs (5.4-8.1 Nm) for lubricated threads. Over-tightening may cause thread stripping due to brass's lower shear strength compared to steel.

Q4: Do you offer clear lacquer coating for tarnish resistance?

A: Yes, we offer optional clear lacquer (epoxy-based) coating that prevents tarnishing for 3-5 years in indoor environments. For outdoor marine use, we recommend natural patina development.

Q5: What is the lead time for custom-length orders?

A: Standard custom lengths (0.5"-6") ship within 5-7 business days. Non-standard diameters or thread pitches require 10-14 days for tooling setup.

Q6: Are these bolts compatible with standard 1/4-20 nuts?

A: Yes, the UNC 1/4-20 thread is fully compatible with standard hex nuts, wing nuts, and lock nuts. We recommend using brass or nylon-insert lock nuts for vibration-prone applications.

Q7: Do you provide Material Test Reports (MTR) with shipments?

A: Yes, MTRs are included free of charge for orders over 500 pieces. Third-party inspection certificates are available upon request at nominal cost.

Contact our sales team today for a quote, free samples, or technical drawing for your specific application. We ship globally with tracking and insurance on all orders over $500.