Brass Lock Nuts

When threaded assemblies require firm retention and electrical grounding, brass lock nuts must hold without loosening under vibration. We manufacture these nuts with controlled thread class, varied hex sizes, and reliable fits for NPT, BSP, and metric systems.

Nominal Pipe Size / Thread Size

#4-40 to 2″ (Metric: M3 to M50)

Thread Type

NPT, BSPT, BSPP, Metric (Internal/External)

Material Grade

C36000 (Free-Cutting Brass), CW617N (EN), C37700 (High-Strength)

Overall Thickness / Height

0.1″ – 0.75″ (varies with thread size)

Hex Size / Wrench Size

0.25″ – 1.5″ (e.g., 1/2″ NPT: 7/8″ Hex)

Product Description

Inconsistent locking can cause system failures and raise maintenance costs. These lock nuts stay secure across temperature shifts, electrical loads, and frequent torque cycles.

Outer Diameter

0.3″ – 2.5″ (size-dependent)

Thread Class / Tolerance

Class 2B (Internal), Class 2A (External) – ISO 228/ASME B1.1 compliant

Thread Pitch

14 TPI (1/8″ NPT) to 8 TPI (2″ NPT) / Metric pitches (e.g., M12x1.75)

Finish/Coating

Natural Brass, Electroless Nickel (ENP), Chrome, Anti-Corrosive Coating

Standards Compliance

ASME B1.20.1, ISO 228, DIN 7604, ANSI B16.11, ASTM B16, RoHS

Weight

0.01 lb – 1.5 lb (size/material-dependent)

Electrical Conductivity

28% IACS (International Annealed Copper Standard)

EMC Screening

EMI/RFI Shielding (with nickel/chrome plating)

Corrosion Resistance Properties

Excellent (saltwater-resistant with ENP/chrome finish)

Temperature Range

-65°F to 400°F (-54°C to 204°C)

Lead-Free Status

Compliant (RoHS, NSF/ANSI 61 for potable water)

Technical Advantages

Poor locking leads to thread slips and compromised safety in electrical and fluid systems. We produce lock nuts from C36000, CW617N, and C37700 grades to balance machinability, strength, and corrosion resistance. Thread tolerance follows ISO 228 and ASME B1.1 with pitch options from fine metric to 8 TPI for 2″ NPT. With sizes from #4-40 to M50 and coatings like ENP and chrome, these nuts adapt to varied environments with minimal wear.

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Industry Applications

Panel Mount Fittings

Locks threaded parts securely through panels, preventing movement during mechanical stress.

Instrumentation Assemblies

Holds sensors or gauges in place, maintaining calibration in high-vibration zones.

Electrical Box Terminations

Grounds conduit fittings, supporting continuity across metal enclosures.

Machinery Housing Seals

Fastens components to fixed housings, resisting loosening from machine operation.

Fluid Transfer Lines

Anchors fittings in pipe assemblies, maintaining joint integrity under flow pressure.

Telecom Grounding Setups

Supports EMI shielding where stable ground connections are required.

Designed for Assembly Consistency

Locking performance matters when threaded parts must stay fixed during operation or transport. Our brass lock nuts bring consistency across assembly runs, allowing batch-level customization for thread type, coating, and hex fit.

You avoid mismatch during installation by aligning nut specs with your fitting standards upfront. With secure grip and low maintenance cycles, these lock nuts reduce adjustment downtime across long-term use.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

Can you match lock nuts to non-standard thread pitches used in our existing designs?

Yes, we can machine to match special thread pitches, including non-listed metric and inch variants. We verify compatibility by cross-referencing with your mating part drawings or samples. This helps prevent misfits during your final assembly stage.

Do you offer finish options suitable for outdoor or marine-facing enclosures?

We provide finishes like electroless nickel and chrome that resist salt spray and environmental corrosion. You can also request anti-corrosive coatings for specific use cases. These options help reduce part degradation and lower your maintenance intervals.

How do you manage dimensional accuracy across different thread classes?

We manufacture threads under Class 2A/2B and ISO 228 standards using calibrated gauges. For tighter control, we adjust cutting tools and perform fit checks during batch runs. This ensures consistent torque performance across different nut sizes.

Can I define my own hex size or outer diameter for tool compatibility?

Yes, we can machine to your preferred hex or wrench size based on tool clearance or space constraints. We support variations outside the standard range if your fittings need exact engagement. Custom sizing helps prevent slippage or tool misalignment in your assembly process.

Is it possible to combine electrical grounding needs with locking functionality in one part?

Yes, we can build lock nuts that serve both mechanical fastening and grounding through conductive finishes. You can specify contact surface area or plating type to meet EMI or RFI shielding expectations. This reduces the need for multiple parts and simplifies your wiring layout.

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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Components Built for Critical Performance

Engineered Products for Critical Applications

Brass Lock Nuts

Nominal Pipe Size / Thread Size

Thread Type

Material Grade

Overall Thickness / Height

Hex Size / Wrench Size

Product Description

Outer Diameter

Thread Class / Tolerance

Thread Pitch

Finish/Coating

Standards Compliance

Weight

Electrical Conductivity

EMC Screening

Corrosion Resistance Properties

Temperature Range

Lead-Free Status

Technical Advantages

Let's Get Started

Industry Applications

Designed for Assembly Consistency

Related products

Brass Nipples

Brass Plugs & Caps

Brass Hex Sockets

Having Doubts? Our FAQ

Get Clarity with Our Manufacturing Insights

We'd love to Manufacture for you!

LOCATIONS

Registered Office

Operations Office

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

Other Locations

GENERAL ENQUIRIES

Get Your Quote Now

Brass Lock Nuts

Get Latest Price

Brass Lock Nuts

Get Latest Price