| Item | Full Details |
|---|
| Product Full Name | Hex Groove Custom Length Zinc Plated Double Hex Long Connecting Nut, Multi-Standard Carbon Steel & Stainless Steel Hex Coupling Nut for Machinery Connection & Equipment Assembly |
| Brand Trademark | HYS |
| Place of Origin | China |
| Core Product Type | Hex Coupling Nut / Double Hex Long Connector Nut, double-head hexagonal long coupling nut used to connect two bolts for lengthened assembly of mechanical equipment |
| Core Material & Grade | Dual optional raw materials: Carbon Steel / Stainless Steel; multiple tensile grades available: 4.8 / 6.8 / 8.8 / 12.9 carbon steel for different load demands |
| Specification Range | Standard metric thread sizes M4-M16; fully customizable custom overall length, inner thread pitch and outer hex size per mechanical drawings |
| Compliance Standards | Global multi-standard compatibility: DIN, ANSI, GB, JIS, GOST, BSW; meets international coupling fastener dimensional standards |
| Performance Grade | Optional mechanical strength grades 4.8 / 6.8 / 8.8 / 12.9, matched with light, medium and heavy load mechanical connection scenarios |
| Tolerance Grade | Custom dimension tolerance according to customer drawing requirements, high precision fit for matched bolt assembly |
| Head & Structural Design | Double-sided uniform hexagonal outer groove structure, compatible with standard hex wrench clamping at both ends; through full internal thread design, stable connection for extending bolt distance between two equipment components |
| Connection & Mounting Method | Matched with common standard bolts; screwed onto two bolts simultaneously to realize lengthened fixed connection between mechanical frames and equipment modules |
| Core Production Process | Cold forging integral forming + precision thread rolling, stable straightness of long body, smooth burr-free internal threads for long-term vibration-resistant assembly |
| Surface Treatment Options | Multi anti-corrosion finishes: Zinc Plated, Black Oxide, Hot-dip Galvanized, customizable surface coating as customer needs |
| Key Product Features | Dual-end hex groove wrench design, fully customizable overall length, multi-strength grade options, carbon & stainless steel material selection, multiple anti-rust surface treatments, stable long-distance mechanical connection performance |
| Main Application Scenarios | General machinery frame lengthened connection, automation equipment module assembly, engineering machinery cabinet fixing, conveyor equipment component linking, large equipment split assembly |
| Customization Service | Full one-stop customization: custom metric thread size, total length, hex width, material grade, surface anti-rust process, laser engraved brand logo, customizable standard export carton packaging |
| Drawing Support | Accept custom machinery and equipment assembly engineering drawings; technical team provides tensile load fatigue testing, long-body straightness detection and mechanical connection structural optimization consultation |
| Supporting Services | Free sample testing available for machinery manufacturers, automation equipment factories and engineering hardware distributors; complete OEM custom machining mass production for hex coupling nut series |
| Quality Control System | 100% full dimensional inspection before shipment; strict thread matching test, long-body straightness measurement, tensile strength grading verification, surface coating uniformity inspection, full batch production traceability management |
| Transportation Packaging | Standard customizable export carton packing, adjustable packaging capacity according to order volume to avoid collision deformation during transit |
| Port of Loading | Shanghai Port, supports FOB, CIF, CFR, DAP and other mainstream Incoterms clauses; complete global sea freight logistics arrangement and customs clearance auxiliary services |
| Minimum Order Quantity (MOQ) | 10,000 PCS; MOQ negotiable for long-term cooperative machinery factories, automation equipment enterprises and engineering hardware wholesale customers with bulk coupling nut procurement orders |
