Lock Nuts Supplier Exporter in China
Ningbo Teng Qi Fasteners Co., Ltd is a lock nuts supplier in China. Lock nut, also known as locking nuts or prevailing torque nuts, are a type of nut designed to resist loosening due to vibration, temperature fluctuations, or other external forces. They provide an extra level of security to threaded connections by adding a locking mechanism that prevents the nut from coming loose unintentionally.
Feature of lock nuts:
| Locking Mechanism: | Lock nuts incorporate a locking feature that increases the friction or tension on the threads, making it harder for the nut to rotate freely |
| Prevailing Torque: | The prevailing torque is the resistance encountered when tightening or loosening the lock nut. This resistance is deliberately added to prevent the nut from loosening on its own. |
| Types of Locking Mechanisms: | There are several types of locking mechanisms used in lock nuts, including nylon inserts, deformed threads, serrated flanges, and metal inserts. These mechanisms create additional resistance or interference to prevent self-loosening. |
| Applications: | Lock nuts are used in applications where vibration, movement, or changes in temperature could potentially cause traditional nuts to come loose. |
Specification of Lock Nuts:
Lock nuts find applications in situations where preventing the unintentional loosening of threaded connections is crucial. They offer added security to fasteners exposed to vibrations, temperature fluctuations, or dynamic loads.
Lock nut are selected based on factors such as the type of locking mechanism, prevailing torque, material compatibility, and specific environmental conditions. Their ability to maintain secure connections in challenging circumstances makes them indispensable components across a wide range of industries.
| Product name | Lock Nuts |
| Type of lock nuts | Nylon Insert Lock Nuts Serrated Flange Lock Nuts All Metal Lock Nuts |
| Diameter | Metric: M3-M48 Imperial:2#-2” |
| Class | 5/8/10/12 A2-70 A2-80 A4-70 A4-80 |
| Grade | SAE J995 GR.2/5/8 |
| Material | Steel/Stainless steel/Brass/Aluminum |
| Manufacturing Process | wire drawing, cold heading/hot forging, thread rolling, heat treatment, surface treatment |
| Surface treatment | Black Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating |
| Application Industry | Construction/Agricultural Machinery/Industrial Structures/Equipment and Machinery/Infrastructure/Mechanical and Engineering/Automotive and Transportation |
Manufacturing Quality Control of lock nut:
| Inspect Item | Detail |
|---|---|
| Dimensional Inspection | Critical dimensions such as bolt diameter, head width, head height, bolt length and thread length are checked using calibrated measuring equipment. Inspection is carried out according to the applicable dimensional standard or customer drawings to ensure consistent fit and interchangeability. |
| Thread Inspection | External threads are inspected using calibrated GO and NO-GO thread gauges to verify thread profile, pitch and dimensional conformity. Additional measurements can be performed when tighter thread tolerances or specific customer requirements apply. |
| Mechanical Testing | Mechanical properties are verified according to the specified material and strength grade. Depending on the applicable standard, testing may include tensile strength, yield strength, hardness and other required mechanical tests, with test results documented in the relevant inspection or material reports. |
| Surface & Coating Inspection | Bolt surfaces are inspected for appearance, defects, coating uniformity and other specified requirements. For coated fasteners, coating thickness and adhesion or other applicable coating characteristics can be checked according to the specified surface treatment standard. |
| Final Inspection & Testing | Before shipment, finished hex bolts undergo final inspection to confirm dimensions, thread quality, mechanical requirements, surface condition, marking and packaging. Inspection records and test reports can be provided according to the order specification and customer requirements. |