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But the cow Hex Nuts Assortment Review: Handy metric lock nut kit for DIY and repairs

200 Pcs Metric Hex Nuts M3 M4 M5 M6 M8, Metric Standard Thread Assorted Self Locking Hexagon Lock Nuts Assortment, Carbon Steel
4.8
[High Quality Carbon Steel]  Made from high strength carbon steel for superior hardness, corrosion resistance, and long-lasting durability.
[Secure Fastening]  Designed to lock with bolts and screws, preventing loosening and ensuring a firm, stable connection.
[Organized Storage Box]  Transparent compartmentalized box keeps sizes organized, portable, and easy to access.
[Versatile Applications]  Ideal for machinery, electronics, automotive repair, home appliances, DIY projects, and professional maintenance.
[Comprehensive 200-Piece Set]  Includes 200 nuts across six sizes (M3–M8) to meet diverse repair and assembly needs.
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Hardware essentials for small repairs and projects, But the cow Hex Nuts Assortment supplies a range of carbon steel metric self-locking hex nuts. Home improvers and maintenance professionals can rely on durable, corrosion-resistant fastenings that stay secure. Will the size mix and organised storage box cover everyday DIY and workshop needs?

⚡ At a Glance
  • Material Strength: High-strength carbon steel, corrosion-resistant and hard-wearing
  • Best for: DIY enthusiasts, tradespeople and maintenance workers needing organised fastenings
  • Not ideal for: Applications requiring stainless steel or specialised coating for prolonged marine exposure

Carbon steel construction gives durability and corrosion resistance. A 200-piece assortment with multiple metric sizes comes in a compartmented storage box for easy organising.


Secure fastenings - with self-locking hexagon thread design

Self-locking hexagon nuts rely on a thread profile that grips bolt threads to resist loosening under vibration and repeated use. The locking action is integrated into the nut geometry rather than relying on separate components.

Reliable thread grip prevents bolts working loose in machinery and appliances, reducing maintenance checks. Suitable for assemblies where a firm, lasting connection is important.

Long-lasting performance - with high-strength carbon steel construction

Carbon steel offers elevated tensile strength and hardness, helping nuts resist deformation under torque. Corrosion-resistant treatment helps preserve mechanical integrity in harsher environments.

Durable fastenings tolerate repeated tightening and heavy use, keeping joints secure over time. Corrosion resistance extends usable life in garages, workshops and many household applications.

Organised storage and ready availability - with a transparent compartment box

Assorted nuts are separated into labelled compartments inside a clear, sturdy storage box that keeps sizes distinct and visible. The set contains exact counts per size to maintain stock clarity.

Quickly find the correct M3 to M8 size without sorting through loose parts, saving time on jobs. The compact box makes transport and storage straightforward for mobile work or home toolkits.

✨ The 4 Key Reasons for But the cow Hex Nuts Assortment
  1. Self-locking thread – Reduces loosening under vibration during regular use
  2. Comprehensive size mix – Includes M3, M4, M5, M6 and M8 for common repair jobs
  3. Transparent compartment box – Keeps 200 pieces organised and easy to locate
  4. Carbon steel construction – Withstands torque and regular handling for long service life
📋 Technical Details at a Glance
  • Category: Metric hex nuts assortment
  • Brand: But the cow
  • Material: Carbon steel
  • Thread standard: Metric standard thread
  • Locking type: Self-locking hexagon nuts
❓ Frequently Asked Questions

Q: What sizes are included in the kit?

A: The set contains M3, M4, M5, M6 and M8 sizes, with a total of 200 pieces divided as 70 M3, 60 M4, 40 M5, 20 M6 and 10 M8.

Q: Are the nuts suitable for use in harsh environments?

A: Descriptions state corrosion resistance and long-lasting durability, indicating suitability for use in harsher environments, though no specific coating or rating is listed.

Q: Is the set organised for easy access on the job?

A: A transparent, sturdy storage box with separate compartments keeps sizes organised and easy to carry between sites.

🏆 Our Verdict

The But the cow Hex Nuts Assortment suits DIY enthusiasts, tradespeople and maintenance workers who need a ready supply of metric lock nuts. The combination of self-locking threads, carbon steel strength and a compartmented storage box makes the kit especially practical for routine repairs. Given the wide size range and durable materials, the set represents strong long-term value for workshop and home use.