10pcs UNC Prevailing Torque Flange Hex Lock Nuts – Stainless Steel

JARBLUE Heavy-Duty UNC Prevailing Torque Flange Hexagon Lock Nuts – 10-Pack

Keep your assemblies firmly in place with these JARBLUE stainless steel UNC coarse-thread prevailing torque flange hexagon lock nuts. Engineered for demanding applications, these heavy-duty metal nuts feature a built-in prevailing torque locking form that resists self-loosening under vibration and dynamic loads — no additional locking washers or adhesives required.

Available in a range of popular American UNC (Unified National Coarse) inch sizes — 1/4, 5/16, 3/8, 1/2, #6-32, #8-32, and #10-24 — making them a versatile fastener choice for electrical assemblies, mechanical projects, automotive builds, and general DIY applications.

Key Features

• Material: Durable stainless steel for corrosion resistance and long-lasting performance
• Thread Standard: UNC (American Coarse Thread) — sizes 1/4, 5/16, 3/8, 1/2, #6-32, #8-32, #10-24
• Flange Design: Integrated flange distributes clamping load evenly, protecting the mating surface
• Prevailing Torque Lock: Heavy-form locking mechanism resists loosening from vibration without added hardware
• Pack Quantity: 10 pieces per order — ideal for small projects or topping up your toolkit
• Customizable: Custom sizing and quantities available on request
• Country of Origin: Made in China

Specifications

What Are Prevailing Torque Flange Nuts?

Unlike standard hex nuts, prevailing torque lock nuts use a deformed or distorted thread section that grips onto the bolt, requiring extra torque both to tighten AND to remove. The integrated flange acts as a built-in washer, spreading the load over a wider surface area. This combination makes them the go-to choice for any application where vibration or movement could cause a standard nut to back off.

Common Applications

• Electrical panel and conduit assemblies
• Automotive and machinery builds
• Structural and industrial fabrication
• General DIY construction and repairs
• Securing brackets, frames, and fixtures

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Frequently Asked Questions

Q: What thread standard do these UNC flange lock nuts use?

A: These nuts use the UNC (Unified National Coarse) American inch thread standard, available in sizes 1/4, 5/16, 3/8, 1/2, #6-32, #8-32, and #10-24. UNC is one of the most widely used inch-thread standards in North American fastener applications.

Q: Can these prevailing torque lock nuts be reused after removal?

A: Prevailing torque nuts can typically be reused a limited number of times. However, each removal reduces the prevailing torque (locking resistance). For critical or safety-sensitive assemblies, it is best practice to use a fresh nut each time to ensure maximum locking performance.

Q: Why choose a flange nut over a standard hex nut with a separate washer?

A: The integrated flange eliminates the need for a separate washer, simplifying assembly and ensuring consistent load distribution every time. It also prevents the washer from being forgotten or misaligned, making flange nuts a more efficient and reliable choice for high-volume or time-sensitive projects.

Q: Are these nuts suitable for outdoor or corrosive environments?

A: Yes. Made from stainless steel, these nuts offer good resistance to rust and corrosion, making them suitable for outdoor, damp, or mildly corrosive environments compared to standard carbon steel fasteners.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.