Metric Zinc Plated Nylon Lock Nuts

What do Class 8 and Class 10 mean?

Metric nuts use a property class number rather than an SAE grade. Class 8 is a standard-strength nut comparable to SAE Grade 5, while Class 10 is a higher-strength nut comparable to SAE Grade 8. Choose the class that matches your metric bolt's property class, such as 8.8 or 10.9, since pairing them gives a balanced joint. The nylon insert resists loosening from vibration, and the zinc plating adds corrosion resistance for indoor and general outdoor use. For wet or coastal exposure, a metric stainless nylon lock nut in A2 or A4 is the better choice.

Why choose metric zinc plated nylon lock nuts

• Metric threads: sized for M-series bolts and rod.
• Class 8 and Class 10: standard and high-strength options.
• Vibration locking: the nylon insert grips the threads to resist loosening.
• Zinc plated: added corrosion resistance for indoor and general outdoor use.

Common applications for metric nylon lock nuts

• Metric machinery and equipment
• Automotive and imported hardware
• Metric brackets, frames, and assemblies
• Vibration-prone metric joints

For wet or coastal metric use, see stainless A2 metric nylon lock nuts, and browse every material on the main lock nuts category.

Metric Zinc Plated Nylon Lock Nuts FAQ

What do Class 8 and Class 10 mean?

They are metric strength property classes. Class 8 is comparable to SAE Grade 5, and Class 10 is comparable to SAE Grade 8. A higher class number means higher strength.

How do I match a metric nut to my bolt?

Match the nut class to your bolt's property class, such as an 8 nut with an 8.8 bolt or a 10 nut with a 10.9 bolt, so the joint strength is balanced.

Are metric zinc nylon lock nuts good outdoors?

The zinc plating suits indoor and general dry outdoor use. For wet, coastal, or saltwater exposure, choose a metric stainless nylon lock nut in A2 or A4.