Brass Lock Nuts
Brass Lock Nuts
Brass Lock Nuts are specialized fasteners designed to prevent loosening due to vibrations or rotational forces. These nuts feature a secure locking mechanism, making them ideal for applications in electrical, automotive, and industrial assemblies where reliability is crucial. Manufactured at our advanced facility in Jamnagar, India, we are one of the leading manufacturers and suppliers of Brass Lock Nuts. Our precision-engineered products are trusted worldwide for their durability, corrosion resistance, and superior quality.
Metric & Imperial Standards
| Standard | Thread Size | Hex Size (Across Flats) mm/inch | Thickness mm/inch |
|---|---|---|---|
| Metric (ISO 4035) | M3 | 5.5 mm | 2.4 mm |
| M4 | 7 mm | 2.9 mm | |
| M5 | 8 mm | 3.2 mm | |
| M6 | 10 mm | 3.7 mm | |
| M8 | 13 mm | 4.7 mm | |
| M10 | 17 mm | 5.7 mm | |
| M12 | 19 mm | 6.7 mm | |
| M16 | 24 mm | 8.8 mm | |
| M20 | 30 mm | 10.9 mm | |
| M24 | 36 mm | 13.1 mm | |
| M30 | 46 mm | 16.5 mm | |
| M36 | 55 mm | 19.8 mm | |
| M42 | 65 mm | 23.1 mm | |
| M48 | 75 mm | 27.4 mm | |
| M56 | 85 mm | 31.7 mm | |
| Max Metric Size | M56 | 85 mm | 31.7 mm |
| Imperial (ASTM B16 – Unified Thread Standard) | 1/4″-20 UNC | 7/16″ (11.1 mm) | 7/32″ (5.5 mm) |
| 5/16″-18 UNC | 9/16″ (14.3 mm) | 1/4″ (6.3 mm) | |
| 3/8″-16 UNC | 11/16″ (17.5 mm) | 5/16″ (7.9 mm) | |
| 1/2″-13 UNC | 7/8″ (22.2 mm) | 3/8″ (9.5 mm) | |
| 5/8″-11 UNC | 1-1/16″ (27 mm) | 15/32″ (11.9 mm) | |
| 3/4″-10 UNC | 1-1/4″ (31.8 mm) | 9/16″ (14.3 mm) | |
| 1″-8 UNC | 1-5/8″ (41.3 mm) | 3/4″ (19.1 mm) | |
| 1-1/4″-7 UNC | 2″ (50.8 mm) | 1″ (25.4 mm) | |
| 1-1/2″-6 UNC | 2-3/8″ (60.3 mm) | 1-3/16″ (30.2 mm) | |
| 2″-4.5 UNC | 3″ (76.2 mm) | 1-1/2″ (38.1 mm) | |
| Max Imperial Size | 2″-4.5 UNC | 3″ (76.2 mm) | 1-1/2″ (38.1 mm) |
Notes:
- Metric Lock Nuts conform to ISO 4035 / DIN 439 standards.
- Imperial Lock Nuts conform to ASTM B16 / ASME B18.2.2 / Unified Thread Standard (UTS).
- Maximum sizes listed for both Metric (M56) and Imperial (2″-4.5 UNC).
- Hex sizes are measured across flats.
- Thickness values are approximate and may vary slightly depending on manufacturer specifications.Brass lock nuts are hexagonal or round nuts designed to resist loosening due to vibrations, torque, and other mechanical forces. They are commonly used in applications requiring a secure and stable fastening. These nuts are made from high-quality brass alloys, offering superior corrosion resistance, electrical conductivity, and durability.UsageBrass lock nuts are widely used in various industries due to their excellent anti-corrosion properties and ability to maintain a secure grip. Common applications include:
- Electrical and Electronics – Used in electrical panels, terminals, and grounding applications due to brass’s high conductivity.
- Plumbing and Water Systems – Ideal for securing fittings in water and gas pipelines due to brass’s resistance to rust.
- Automotive and Machinery – Used in engines, gear assemblies, and vibration-prone environments.
- Marine and Aerospace – Preferred for their non-corrosive properties, making them suitable for humid and saltwater environments.
- Construction and HVAC – Applied in heating, ventilation, and structural fastenings.
Material Grades
Brass lock nuts are manufactured using different grades of Brass alloys, which vary in composition depending on strength, machinability, and corrosion resistance requirements. The most commonly used grades include:
- C36000 (Free Machining Brass) – High strength, excellent machinability, and corrosion resistance.
- C37700 (Forging Brass) – Good hot-working properties, ideal for high-strength applications.
- C27200 (Yellow Brass – 63% Cu, 37% Zn) – Good corrosion resistance and cost-effective.
- C46400 (Naval Brass) – Used in marine applications due to excellent resistance to saltwater corrosion.
- C69300 (Lead-Free Silicon Brass) – Eco-friendly alternative with high mechanical strength.
Tolerance
Brass lock nuts are manufactured with high-precision tolerances, ensuring proper fitment and reliable fastening.
- Metric Tolerances – As per ISO 4035 / DIN 439, typically within ±0.1mm to ±0.3mm depending on thread size.
- Imperial Tolerances – As per ASTM B16 / ASME B18.2.2, generally within ±0.002″ to ±0.005″.
- Thread Fit – Standard threads conform to ISO 6H (metric) or 2B/3B (imperial) for a snug fit.
Surface Finish Options
Brass lock nuts are available in different surface finishes to enhance durability, aesthetics, and performance. Common finishes include:
- Plain Brass Finish – Natural finish with a bright, metallic appearance.
- Nickel Plating – Enhances corrosion resistance and provides a polished silver look.
- Chrome Plating – Improves durability and aesthetics, often used in decorative applications.
- Tin Plating – Provides enhanced electrical conductivity for grounding applications.
- Passivation – Chemical treatment to remove impurities and enhance corrosion resistance.
- Black Oxide Coating – Reduces light reflection and enhances surface hardness.
Key Benefits of Brass Lock Nuts
✅ Corrosion Resistant – Ideal for wet and humid environments.
✅ Excellent Conductivity – Perfect for electrical and electronic applications.
✅ Non-Magnetic – Suitable for sensitive applications like precision instruments.
✅ High Strength & Durability – Withstands high torque and mechanical loads.
✅ Reusable & Easy to Install – Can be used multiple times without losing grip strength.
