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Locknuts

At SCHNAP, our Locknuts range offers tradies and contractors reliable, top-quality fittings for every electrical setup. From durable nylon and machined brass to marine-grade 316 stainless steel, we stock sizes from 12mm to 63mm to suit any conduit application. Whether you're after Clipsal-compatible gear or Tradepro's corrosion-resistant solutions, each locknut is built for secure fastening and long-term performance—even in tough Aussie conditions.

Buy online and save with trade discounts across the range. Check live stock levels across Australia and enjoy fast, reliable delivery to your site or shed.

$2.00 $1.70
Lock nut brass 40.0mm made from durable brass metal—ideal for securing bolts in construction and industrial applications. Built for reliable fastening, with a single pack quantity for individual use.
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$3.40 $2.80
Lock nut brass 50.0mm made from durable brass metal, ideal for heavy-duty fastening in construction and industrial applications. This single pack is perfect for securing bolts and fasteners, ensuring reliable performance and longevity.
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$3.80 $3.20
Lock nut brass 63mm made from durable brass metal—ideal for construction and industrial fastening applications. Built for secure fastening, with a single pack quantity for convenience.
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$1.60 $1.40
Brass EMC lock nut M16 designed for secure EMC grounding in electrical cable installations. Ideal for industrial and commercial applications, it features durable brass construction and is compliant with AS/NZS 3000 standards.
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$8.30 $6.80
Brass lock nut M40 with durable brass construction and corrosion resistance—ideal for secure fastening of cable glands in electrical installations. Built for industrial and commercial use, it ensures reliable cable management and protection.
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$4.60 $3.80
Brass EMC lock nut M32 designed for secure cable gland locking—ideal for electrical installations and industrial applications. Built for durability with corrosion-resistant brass, ensuring electromagnetic compatibility for reliable performance.
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$2.30 $1.90
Brass Lock Nut M20 with durable brass construction and secure locking mechanism—ideal for electrical installations requiring reliable fastening of cable glands. Built for industrial and commercial use, it ensures compliance with safety standards while providing long-lasting durability.
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$7.40 $6.10
Brass EMC lock nut M40 designed for secure cable gland locking—ideal for electrical installations and industrial applications. Built for durability with corrosion-resistant brass, it ensures effective electromagnetic compatibility and compliance.
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$14.70 $12.10
Brass EMC lock nut M50 designed for secure cable gland locking—ideal for electrical installations requiring electromagnetic compatibility. Built for industrial and commercial use, it offers durability and corrosion resistance, ensuring long-lasting performance.
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$25.00 $20.70
Brass lock nut M63 with durable brass construction and secure locking mechanism—ideal for electrical installations requiring reliable fastening of cable glands. Built for industrial and commercial use, it offers corrosion resistance and compliance with AS/NZS 3000 standards.
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$2.10 $1.70
Brass EMC lock nut M20 designed for secure cable gland fastening and effective EMC grounding—ideal for electrical installations. Built for industrial and commercial use, it offers durability and corrosion resistance, ensuring compliance with electrical standards.
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$1.00 $0.80
Brass lock nut M12 with durable brass construction and corrosion resistance—ideal for secure fastening of cable glands in electrical installations. Built for industrial and commercial use, it ensures reliable cable management and protection.
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$4.10 $3.40
Brass lock nut M25 with durable brass construction and corrosion resistance—ideal for secure fastening of cable glands in electrical installations. Built for industrial and commercial wiring setups, it ensures reliable cable management and protection.
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$14.80 $12.30
Brass Lock Nut M50 with durable brass construction and secure locking mechanism—ideal for electrical installations requiring reliable fastening of cable glands. Built for industrial and commercial use, it offers corrosion resistance and long-lasting durability.
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$58.20 $48.10
The Brass Reducer Nickel Plated Hazardous Areas is designed for safe electrical installations in hazardous environments. Featuring durable nickel-plated brass construction and IP66/68 ingress protection, it effectively reduces 3/4" NPT threads to M20. Ideal for industrial and commercial applications, this reducer ensures compliance with IECEx standards and includes a locknut for secure fitting.
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$3.20 $2.60
The Locknut Hexagon Nylon M20 Black is designed for securing threaded conduits and adaptors, featuring a hexagonal rim for secure fastening and UV stabilisation for outdoor durability. Ideal for electrical installations, this locknut offers high impact resistance, ensuring long-lasting performance in various applications.
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$10.10 $8.30
The Locknut Hexagon Nylon M40 Black is designed for securing threaded conduits and adaptors, featuring a hexagonal rim for easy tightening and UV stabilisation for outdoor use. With high impact resistance, it's perfect for electrical installations where durability is essential. Ideal for electricians and contractors, this locknut ensures reliable fittings in various applications.
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$13.50 $11.10
The Locknut Hexagon Nylon M50 Black is designed for securing threaded conduits in unthreaded openings, featuring a UV stabilised construction and high impact resistance. Ideal for electrical installations, this locknut ensures a secure fit and is perfect for use with flexible and Anaconda conduits. Its hexagonal rim allows for easy tightening, making it a reliable choice for professionals.
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$125.20 $103.40
The Brass Locknut Nickel Plated M105 Thread is designed for secure fastening of cable glands in electrical installations. Made from durable nickel plated brass, it fits metric conduits ranging from 16mm to 63mm, ensuring compliance with AS/NZS 3000 standards. Ideal for electricians and professionals, this locknut enhances corrosion resistance and extends product life.
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$158.30 $130.80
The Brass Locknut Nickel Plated M120 Thread is designed for securing cable glands in electrical installations. Made from nickel-plated brass, it offers excellent corrosion resistance and is compatible with all Alco metal cable glands. Ideal for fastening in industrial and commercial wiring, this locknut ensures a reliable connection for metric conduits ranging from 16mm to 63mm.
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$88.20 $72.90
The Brass Locknut Nickel Plated M75 Thread is designed for secure fastening of cable glands in electrical installations. Made from durable nickel-plated brass, it is compatible with metric conduits ranging from 16mm to 63mm, ensuring reliability and compliance with AS/NZS 3000 standards. Ideal for professional electricians, this locknut enhances corrosion resistance and supports long-term use.
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$86.50 $71.40
The Locknut Stainless Steel M16 is designed for reliable fastening in electrical installations, made from high-quality grade 316 stainless steel for superior corrosion resistance. Ideal for securing conduit fittings and cable glands, this durable solution ensures compliance with AS/NZS 3000 standards, making it perfect for both professional electricians and DIY enthusiasts.
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$135.70 $112.10
The Locknut Stainless Steel M40 is designed for fastening conduit fittings and cable glands, made from high-quality grade 316 stainless steel for superior corrosion resistance. Ideal for industrial, commercial, and residential electrical installations, this durable solution ensures reliable performance and compliance with AS/NZS 3000 standards.
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$47.00 $38.80
The Locknut Brass M63 is designed for securing cable glands in electrical installations, featuring a durable brass construction and a nickel-plated finish for corrosion resistance. Ideal for both industrial and commercial wiring projects, this metric locknut ensures a secure fit with metal and PVC conduit fittings, making it a reliable choice for electricians and contractors.
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$147.80 $122.10
The Locknut Stainless Steel M63 is designed for secure fastening of conduit fittings in electrical installations. Made from high-quality grade 316 stainless steel, it offers exceptional corrosion resistance and durability. Ideal for use with Wattmaster conduit fittings and cable glands, this locknut ensures reliable performance in various applications, making it a must-have for professional electricians.
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$16.80 $13.50
The Key for Rebate Lock features an 8 mm male triangle design, crafted from durable metal for long-lasting use. Ideal for industrial enclosures and electrical cabinets, this key ensures secure locking mechanisms in commercial settings. With a three-square model, it provides reliable access control without the need for professional installation.
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$14.50 $11.60
The Key for Rebate Lock is designed with a double bar metal construction, ensuring durability and secure locking for industrial enclosures. Perfect for electrical cabinets and commercial facility security, this key is easy to use and compatible with rebate locks, making it an essential tool for maintaining safety in your workspace.
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$1.50 $1.20
The Metal Locking Nut PG 16 is designed for secure cable management, featuring a durable nickel-plated brass construction that ensures corrosion resistance. Ideal for industrial and electrical installations, this halogen-free and shock-resistant nut provides enhanced safety in harsh environments, making it a reliable choice for securing cable glands.
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$17.20 $13.80
The Metal Locking Nut PG 42 is expertly designed for secure cable entry in industrial applications. Made from high-quality nickel-plated brass, it offers excellent corrosion resistance and is halogen-free, ensuring safety in case of fire. Ideal for electrical enclosures and machinery wiring, this durable locking nut guarantees a reliable fit and compliance with electrical standards.
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$2.10 $1.70
The Metal Locking Nut ISO 25 is designed for secure cable gland assemblies, featuring a durable brass construction and a nickel-plated surface for enhanced corrosion resistance. Ideal for both indoor and outdoor electrical installations requiring IP68 protection, this locking nut ensures reliable sealing and compliance with industry standards, making it perfect for industrial applications.
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$14.10 $11.30
The Metal Locking Nut ISO 40 is designed for secure cable gland assemblies, featuring a robust brass construction and a nickel-plated surface for enhanced corrosion resistance. Ideal for industrial and electrical applications, this halogen-free and shock-resistant nut ensures reliable performance in demanding environments.
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$25.60 $20.60
The Metal Locking Nut ISO 63 is designed for secure cable gland assemblies, constructed from high-quality brass for durability and featuring a nickel-plated surface for enhanced corrosion resistance. Ideal for industrial and commercial electrical applications, this halogen-free and shock-resistant nut ensures reliable performance in both indoor and outdoor installations.
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$2.70 $2.20
The Lock Nut 25mm is designed for secure conduit connections, ensuring durability and compatibility with Eureka corrugated conduit systems. Ideal for industrial flexible conduit installations, this lock nut provides reliable protection for wiring, making it a must-have for electricians and professionals in the field.
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$7.20 $5.90
The Lock Nut 32mm is designed for secure conduit connections, ensuring compatibility with Eureka corrugated conduit and fittings. Ideal for industrial flexible conduit installations, this durable lock nut minimizes the need for frequent replacements, making it a reliable choice for electricians and professionals.
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$4.70 $3.90
The Locknut 20mm Nickel Plated is designed for secure fastening in conduit installations, featuring a durable nickel plating that ensures corrosion resistance. Ideal for industrial and commercial electrical applications, this locknut guarantees compliance with AS/NZS 3000 standards, making it a reliable choice for electricians and professionals.
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Lock It In: A Sparky's Guide to Conduit Locknuts

A conduit fitting is only as secure as the nut that's holding it tight. A loose connection that vibrates over time isn't just unprofessional—it's a future point of failure. The humble electrical locknut is the essential component that guarantees a rock-solid, vibration-proof fastening for your conduit entries into switchboards, junction boxes, and enclosures.

At SCHNAP, our Locknuts range offers Aussie tradies and contractors reliable, top-quality fittings for every electrical setup, from a standard domestic fit-out to the toughest industrial site.

Choosing the Right Locknut Material for the Job

Selecting the right material for the environment is key to a long-lasting, compliant installation.

  • Durable Nylon Locknuts: The versatile and cost-effective choice for securing PVC fittings into PVC or plastic enclosures. They are naturally corrosion-free and easy to work with, making them a staple in any sparky's kit.
  • Machined Brass Locknuts: The industry standard for a secure mechanical and electrical earth continuity bond. When you're connecting metal conduit fittings to a steel switchboard or enclosure, a brass locknut is the professional's choice. Our range includes Clipsal-compatible gear you can rely on.
  • Marine-Grade 316 Stainless Steel Locknuts: For the toughest Aussie conditions, you need the ultimate in corrosion resistance. For installations in coastal, marine, or highly corrosive industrial environments (like food processing plants), 316 stainless steel locknuts offer unparalleled long-term performance and prevent rust.

A Size for Every Conduit

From a small 12mm lighting circuit right up to a heavy-duty 63mm sub-main, we've got the right size locknut to suit any standard Australian conduit application.

Trusted Brands for a Secure Fastening

A secure connection starts with quality parts. We stock a huge range of locknuts from the brands that Aussie sparkies trust on their jobs every day, including Tradepro's corrosion-resistant solutions and other industry leaders like Matelec.

Why Sparkies Choose SCHNAP

Don't let a cheap, low-quality nut compromise your professional installation.

  • A complete range of nylon, brass, and 316 stainless steel locknuts.
  • Sizes from 12mm to 63mm to suit any conduit application.
  • Trusted brands built for tough Aussie conditions.
  • Fast delivery and competitive trade pricing.

For the rock-solid locknuts you need to keep your connections tight and your installs compliant, trust SCHNAP to have you covered.

Need locknuts at the best prices and good quality? Shop now at Schnap