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The hex coupling nut is a fastener with a hexagonal shape and a significantly longer length than a regular nut. Its core function is to connect two threaded rods (such as studs, threaded rods, or bolts) to achieve axial extension or rigid mating. It is an “extended hexagonal nut” specifically designed for strong thread-to-thread coupling connections.
Hex nuts are standard hexagonal fasteners with threaded inner holes. They are primarily used with bolts and screws, generating axial force through helical engagement to connect and secure machine parts. They are widely used in construction, automotive, and machinery industries.
Hex Nut Classification:
1. By Thickness: Hex nuts are divided into Type 1 (standard height, most widely used), Type 2 (thickened, resistant to frequent assembly and disassembly), and thin nuts (for space-constrained applications).
2. By Function: Hex nuts have evolved into specialized variants such as anti-loosening types (e.g., slotted nuts with cotter pins), flange types (with flanges to increase the stress surface), and cap types (to protect bolt heads).
High Quality Nuts are fasteners that are screwed onto a bolt or threaded rod to secure a fastener. High Quality Nuts are generally classified into several types, including carbon steel, stainless steel, and non-ferrous metals (such as copper). High quality nuts are typically hexagonal in shape with internal threads, used to mate with bolts to tighten related components.
High Quality Nuts are categorized by their properties according to national standards (GB), German standards (DIN), international standards (ISO), Japanese standards (JIS), and American standards (ASTM/ANSI). GB, DIN, and JIS standards use “M” to indicate size (e.g., M8, M16), while American and British standards use fractions or “#” to indicate size (e.g., 8#, 10#, 1/4, 3/8).