Hex Flange Nylon Insert Lock Nuts M3–M12 | Stainless & Carbon
Hex Flange Nylon Insert Lock Nuts M3–M12 | Stainless & Carbon
Details
Hex Flange Nylon Insert Lock Nuts — M3 to M12
Keep your fasteners firmly in place with these high-quality hex flange nylon insert lock nuts (nylock locknuts). The integrated nylon insert creates a secure friction lock that resists loosening caused by vibration, thermal cycling, and dynamic loads — making them ideal for machinery, automotive assemblies, woodworking projects, electronics enclosures, and general DIY applications.
Material Options
- 304 Stainless Steel (A2-70) — Corrosion-resistant, CE & RoHS certified, suitable for outdoor and humid environments
- Carbon Steel — Black Zinc-Plated — Enhanced surface protection with a sleek black finish
- Carbon Steel — White Zinc-Plated — Classic zinc coating for everyday fastening needs
Thread Sizes & Pitches Available
| Size | Thread Diameter | Thread Pitch |
|---|---|---|
| M3 | 3 mm | 0.5 mm |
| M4 | 4 mm | 0.7 mm |
| M5 | 5 mm | 0.8 mm |
| M6 | 6 mm | 1.0 mm |
| M8 | 8 mm | 1.25 mm |
| M10 | 10 mm | 1.5 mm |
| M12 | 12 mm | 1.75 mm |
Key Features
- ✅ Nylon insert locking mechanism — prevents self-loosening under vibration
- ✅ Flanged bearing surface — distributes load evenly without a separate washer
- ✅ CE & RoHS certified (stainless steel variants)
- ✅ Customizable quantities — available in packs of 2, 5, or 10
- ✅ Metric standard threading — compatible with standard M-series bolts and screws
- ✅ Wide range of applications — machinery, automotive, DIY woodworking, electronics, and more
Specifications
- Brand: JARBLUE
- Type: Hex Flange Nylon Insert Lock Nut (Nylock)
- Materials: 304 Stainless Steel / Carbon Steel (Black or White Zinc-Plated)
- Sizes: M3, M4, M5, M6, M8, M10, M12
- Certification: CE, RoHS
- Country of Origin: Made in China
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Frequently Asked Questions
Q: What is the difference between a nylon insert lock nut and a standard hex nut?
A: A nylon insert lock nut (nylock) features a nylon collar at the top of the nut. When tightened onto a bolt, the nylon collar grips the thread and creates additional friction that prevents the nut from vibrating loose over time. A standard hex nut relies solely on clamping force and can work loose under vibration without additional thread-locking measures.
Q: Can these hex flange nylon lock nuts be reused?
A: Nylon insert lock nuts can be reused a limited number of times, but the locking effectiveness of the nylon insert decreases with each use. For safety-critical or high-vibration applications, it is recommended to use a fresh nut. For general DIY and low-vibration applications, careful reuse is acceptable.
Q: What is the advantage of the flanged design over a standard hex nut?
A: The integrated flange acts as a built-in washer, spreading the clamping load over a larger surface area. This reduces the risk of the nut sinking into soft materials, helps prevent surface damage, and eliminates the need for a separate flat washer in most applications — saving assembly time and reducing part count.
Q: Are these lock nuts suitable for outdoor or corrosive environments?
A: Yes — the 304 stainless steel (A2-70) variants offer excellent corrosion resistance, making them well-suited for outdoor, marine-adjacent, or humid environments. The carbon steel zinc-plated variants provide moderate corrosion protection and are best suited for indoor or sheltered applications.
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.
Materials + Care
We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.
Shipping + Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.