Custom CNC Hex Plug Nut with Dual Male & Female Thread for High Corrosion

Custom CNC Male Female Thread Hex Plug Nut is a dual-purpose precision blocking and switching connector specially designed for fluid control systems. Manufactured from carbon steel or 304/316 stainless steel using integrated CNC turning and cold heading strengthening processes, this hex fitting combines external thread locking, internal thread extension, inner hex installation, and flat sealing functions.

Featuring standard threads, smooth sealing surfaces, and tight dimensional tolerances, it is widely applied for port blocking, pipeline temporary connections, and process hole sealing of oil, air, and water valve bodies. The product maintains stable performance under long-term high fluid pressure without deformation or leakage. Full custom service based on drawings and samples is available for hydraulic valves, pneumatic assemblies, and chemical pipeline equipment.

• Dual Male & Female Thread Integrated Design, Multi-Functional: Unlike ordinary single-thread plugs, this double-thread structure supports port blocking via outer thread and pipeline extension through inner thread, enabling blocking and switching simultaneously. The built-in inner hex hole allows easy tool installation with uniform locking force, providing anti-slip and anti-thread-stripping performance for quick maintenance and pipeline modification.
• Cold Heading Base + High Precision CNC Machining, Excellent Pressure Resistance: The cold heading process optimizes internal metal fiber structure for high density and rigidity, delivering outstanding resistance to high pressure, impact, and alternating fluid loads. Multi-pass CNC machining precisely controls thread profile, hex size, sealing flatness, and concentricity. Burr-free surfaces and uniform fitting clearance effectively prevent deformation, oil, and air leakage under continuous high-pressure operation.
• Precision Flat Sealing Surface for Zero Leakage: Ultra-smooth sealing end faces match well with O-rings and flat gaskets to achieve reliable sealing against compressed air, hydraulic oil, clean water, and mild corrosive chemicals. Tightly engaged threads provide anti-loosening performance under equipment vibration, stabilizing system working pressure and reducing leakage failures.
• Multiple Material & Anti-Corrosion Treatment Options: Available in carbon steel, 304, and 316 stainless steel for different working conditions. Carbon steel can be treated with black oxide, zinc plating, or nickel plating for rust protection. Stainless steel offers natural acid, alkali, and moisture resistance, making it ideal for electroplating, chemical, and outdoor humid pipeline environments. Material and surface finish can be customized according to medium pressure and corrosiveness to extend service life.
• Comprehensive Non-Standard Customization: We provide full customization of internal and external thread specifications, pitch, overall length, hex size, sealing grooves, steps, counterbores, and special end faces. Prototype trial orders, small batch, and mass production are all acceptable, meeting supporting, maintenance, and equipment upgrading demands for all kinds of fluid machinery.

• Blocking and sealing connectors for hydraulic fluid valve bodies
• Air circuit plug nuts and process hole sealing parts for pneumatic control systems
• High-pressure leak-proof plugs for oil and water pipelines of automation equipment
• Corrosion-resistant pipeline transition fittings for chemical and water treatment machines
• Custom CNC male female hex plugs for non-standard fluid control modules

Every custom CNC male female thread hex plug nut undergoes full dimensional inspection, thread gauge testing, high-pressure air/hydraulic tightness testing, and burr screening before delivery. Standard sizes are in stock for fast shipment, and one-stop custom CNC precision machining service is offered. We supply high-precision, pressure-resistant, and long-lasting pipeline blocking connectors for global fluid control, hydraulic, pneumatic, and automation manufacturing industries.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.

Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include , Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia.