M5 M8 Carbon steel Dome Cap Nut Class 4.8 Grade 8.8 acron nuts Silver Black finishing

Cap nuts are used similarly to hexagonal nuts but feature a design that prevents easy sliding. They require specialized tools for tightening, including live spanners, dull spanners, dual-purpose spanners, or square-hole socket spanners.

These nuts are primarily used for:

• Rough and simple mechanical parts
• Automotive applications (cars, tricycles, electric vehicles)
• Road light frame bases
• Equipment exposed to weather conditions

Used with bolts and screws for fastener connections. Classified by nominal thickness into Type I, Type II, and thin varieties. Type I nuts (Grades A, B, C) are for precision applications, while Type II are thicker for frequent assembly/disassembly.

Welded nuts providing excellent fastening that resists loosening. Widely used in construction, transportation, and building materials industries.

Feature integrated washers with non-slip tooth patterns for superior anti-loosening performance. Ideal for pipe connections and applications requiring increased contact surface area.

Carbon steel offers excellent mechanical properties for fastening applications:

• High strength and hardness to withstand significant forces
• Durable performance in various environmental conditions
• Reliable fastening for industrial applications

The bolt and nut strength levels are matched (e.g., bolt 8.8 pairs with nut 8) to ensure proper function. In some applications, slightly lower nut strength is preferred for easier maintenance and cost-effective replacement.

Available in small packing, carton packing, and pallet options to meet various shipping and storage requirements.