ASME B18.16.6 Gr.8 Nylon Insert Lock Nut Zinc Plated

The ASME B18.16.6 Gr.8 Nylon Insert Lock Nut Zinc Plated is a prevailing-torque self-locking hex nut manufactured strictly following ASME B18.16.6 industry standard. It is produced from Grade 8 carbon steel, engineered to mate with UNC inch series bolts. The embedded nylon collar acts as the core anti-loosening structure, generating steady friction against bolt threads. When exposed to recurring vibration, impact or alternating load, this design prevents spontaneous loosening that commonly occurs with ordinary plain hex nuts. The zinc plated coating provides dependable basic oxidation resistance, making it suitable for most indoor and mildly exposed outdoor working environments.

Core Advantages

Built on high-strength Grade 8 carbon steel, this nut delivers tensile performance that perfectly matches the requirements of Grade 8 hex bolts.

- Integrated nylon insert locking mechanism, stable anti-vibration performance for assemblies under dynamic loads

- Uniform electro zinc plating finish, clean surface and minimal burrs for neat installation

- Precision UNC inch thread with tight tolerance control, ensuring smooth screwing and reliable fit

- Standard hex profile, compatible with common wrenches, sockets and automatic fastening equipment

- Full compliance with ASME B18.16.6, good interchangeability for replacement and bulk assembly

- Moderate locking torque, easy for manual and machine installation without special tools

Technical Parameters

Typical Application Scenarios

This nylon lock nut is the ideal fastening choice for assemblies that face continuous vibration and shock. It is widely adopted in automotive spare parts, agricultural machinery, truck and trailer frames, light steel construction, general industrial machinery, metal support frames and equipment cabinet fabrication. Many engineers prefer this fastener for dynamic joints, where regular hex nuts cannot hold clamping force steadily under cyclic movement and vibration.

Quality Assurance

Every batch of ASME B18.16.6 Gr.8 Nylon Insert Lock Nut Zinc Plated undergoes a full set of inspection procedures before delivery. Our QC team carries out multiple testing items:

- Overall dimension inspection to comply with ASME B18.16.6 drawings

- UNC thread fit test with professional thread gauges

- Locking torque test to guarantee stable anti-loosening effect

- Nylon collar integrity check, no crack or offset inside the nut

- Zinc coating thickness and surface appearance inspection

- Random sampling to verify mechanical strength of Grade 8 carbon steel

Complete batch records are archived for traceability. Non-conforming pieces will be fully screened out, to guarantee consistent and stable quality for your bulk procurement orders.

Packaging & Export Delivery

We use sturdy export cartons lined with anti-rust paper to protect nuts during long-distance sea or land transit. Custom shipping marks, product labels and brand logos can be printed on cartons based on your requirements. Our export team prepares all required commercial documents to facilitate smooth customs clearance for overseas orders.

FAQ

Q: How many times can this nylon insert lock nut be reused?

A: It supports limited repeated disassembly and assembly. Repeated use will slowly wear the nylon collar and lower locking torque. We recommend using new nuts for safety-critical connections.

Q: Which bolts match this Grade 8 nylon lock nut?

A: It is designed to match same-size ASME B18.2.1 Grade 8 UNC hex bolts.

Q: Can zinc plated nuts work in coastal salty air environments?

A: Standard zinc plating only supplies basic rust protection. For high-corrosion coastal areas, hot dip galvanized or stainless steel nylon lock nuts are more suitable.

Q: Can I get samples for project testing?

A: Samples are available for your performance evaluation. The buyer only needs to bear the shipping freight.

Q: Are other surface treatment options available for this nut?

A: Yes, we also provide color zinc, black oxide and other finishes for ASME B18.16.6 nylon lock nuts upon request.