All Metal Locknuts
Rettig’s Industrial Supplies first opened its doors in 1888. We grow with your success, and we are committed to carrying or sourcing the high-quality industrial components your business needs to conduct efficient operations. All orders ship within twenty-four business hours or less to get you back to work as soon as possible. We strive to save you time, money, and stress by being your one-stop industrial shop.
All metal locknuts are rugged, vibration-resistant fasteners designed for secure, long-lasting performance in high-stress environments. Unlike nylon insert locknuts, these fasteners rely on mechanical deformation to create their locking action, making them ideal for high-temperature, high-vibration, or chemically exposed applications where nylon may degrade or fail.
These locknuts are most commonly used in aerospace, automotive, heavy machinery, construction equipment, and industrial manufacturing—anywhere a secure, reusable, and heat-resistant fastening solution is critical. Whether securing critical engine components or holding structural steel in place, all metal locknuts are engineered for durability and performance under pressure.
There are several types of all metal locknuts, including prevailing torque locknuts (such as top lock and center lock styles) and wedge lock nuts, each offering different locking mechanisms based on thread interference or serrated bearing surfaces. The key benefit is that these locknuts do not rely on plastic inserts, meaning they maintain full locking strength at elevated temperatures and can be reused more reliably.
Specifications include:
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Material: Carbon steel, stainless steel (18-8, 316), alloy steel
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Finish: Zinc-plated, galvanized, black oxide, or plain
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Thread Types: Inch (UNC/UNF) and metric (coarse/fine)
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Locking Mechanism: Deformed threads, elliptical, or serrated design
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Standards: ASME B18.16.6, DIN 980, ISO 7040
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Sizes: Commonly from #6-32 to 1-1/2" and M3 to M36
Whether you're assembling heavy equipment or constructing steel frames, all metal locknuts provide exceptional resistance to vibration, loosening, and thermal breakdown. They're the fastener of choice when failure is not an option.
Looking for bulk pricing, stainless options, or a specific standard? Our team is ready to help you select the perfect locknut for your job.