LOCK NUTS

Product Information

Common types of lock nuts include:

Nylon Insert Lock Nuts: Feature a nylon ring that creates friction against the bolt threads, preventing unintentional loosening.

Metal Lock Nuts: Use deformed threads or integrated locking mechanisms to grip the bolt tightly.

Serrated Flange Nuts: Have serrations on the flange that bite into the surface, enhancing grip.

Lock nuts are manufactured according to various international and industry-specific standards to ensure their performance, reliability, and compatibility with corresponding bolts. Below are some of the most widely recognized standards for lock nuts:

1. ISO (International Organization for Standardization)

ISO 7040: Specifies prevailing torque type hex nuts (non-metallic insert, metric thread) with property classes 5, 8, and 10.

ISO 7042: Covers prevailing torque type all-metal hex nuts (metric thread) with property classes 8, 10, and 12.

2. DIN (Deutsches Institut für Normung - German Institute for Standardization)

DIN 985: Defines hex nuts with nylon inserts (metric thread) for general-purpose locking applications.

DIN 6927: Specifies flange nuts with non-serrated or serrated bases, which provide additional locking through surface grip.

3. ANSI/ASME (American National Standards Institute/American Society of Mechanical Engineers)

ANSI B18.16.3: Covers metric series prevailing torque lock nuts, including nylon insert and all-metal types.

ANSI B18.2.2: Includes inch-series lock nuts, such as nylon insert and metal lock nuts, for use in the United States and other regions following the imperial system.

4. BS (British Standards)

BS 3692: Specifies ISO metric precision hex nuts, including those with locking features.

5. ASTM (American Society for Testing and Materials)

ASTM A194: Covers heavy-duty lock nuts for high-pressure and high-temperature applications, often paired with ASTM A193 bolts.

ASTM A563: Includes carbon and alloy steel lock nuts for general-purpose and structural applications.

6. JIS (Japanese Industrial Standards)

JIS B 1181: Defines metric hex nuts, including those with locking features, widely used in Japan and other Asian markets.

Key Features of Lock Nut Standards:

Thread Compatibility: Lock nuts are designed to match the thread pitch and diameter of corresponding bolts.

Material Grades: Standards specify material properties, such as strength and corrosion resistance, to suit different applications.

Locking Mechanisms: Standards define the type of locking feature (e.g., nylon insert, deformed threads, serrated flange) and its performance requirements.

Product Services

1.After-sales quality control: After finished product inspection, ensure that it meets customer requirements.

2.Cooperation services: We can provide customers with OEM and ODM services to customize products to ensure that customer requirements are met.