Brass Lock Nuts
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:
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:
Tolerance
Brass lock nuts are manufactured with high-precision tolerances, ensuring proper fitment and reliable fastening.
Surface Finish Options
Brass lock nuts are available in different surface finishes to enhance durability, aesthetics, and performance. Common finishes include:
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.
Conex Metals is the flagship company of the CMI group engaged in manufacturing and exports of high quality non-ferrous metal components and wiring accessories.
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