China Brass Threaded Machined Bushings Manufacturer, Supplier, Factory

Precision brass threaded machined bushings are essential hardware components used to create strong, wear-resistant threaded connections in assemblies where base materials are too soft, too thin, or unsuitable for direct tapping. These bushings are CNC machined from high-quality brass alloys to deliver stable thread geometry, smooth engagement, and resistance to corrosion in wet, humid, or mildly acidic environments. Every bushing is produced with controlled lead-in chamfers, clean thread starts, and uniform wall thickness to prevent cross-threading and improve assembly speed. As part of our broader line of Brass CNC Turned Components, these bushings can be supplied with external knurling, hex flanges, or custom drive features. For systems that require leak-tight joints, we also manufacture matching Copper Alloy Machined Fittings in compatible thread forms and pressure ratings. Our manufacturing process includes bar-fed CNC lathes, in-process gauging, and final thread inspection to ensure each part meets the specified pitch diameter and functional size. Unlike stock inserts used for plastic injection molding, our Precision Brass Threaded Inserts are machined after forming, which removes internal stresses and improves dimensional repeatability. For unique designs that combine brass and copper alloys or require complex turned geometry, our Custom Copper CNC Turned Parts service can produce prototypes and production volumes with short lead times. Typical applications include electrical grounding studs, pneumatic cylinder ports, hydraulic adapters, instrument panel mounts, and marine hardware. The combination of good machinability, moderate strength, and attractive surface finish makes brass an economical choice for low-to-medium volume production runs and custom replacement parts.

Brass Threaded Machined Bushings are available in both standard and custom configurations to match common industrial thread specifications. The standard range covers internal threads from M2 to M24 and #2-56 to 1"-14, with external diameters from 0.125" to 2.000". Custom sizes can extend up to 4.000" outside diameter and 6.000" length, depending on the selected alloy and thread profile. These bushings can be manufactured with through holes, blind holes, reduced shanks, or stepped bodies. Because brass has a lower coefficient of friction than steel, these bushings reduce the risk of galling during repeated assembly and disassembly. All parts are deburred and cleaned before packaging, and optional plating such as nickel, tin, silver, or gold can be applied to improve surface hardness or solderability. Quality control includes dimensional layout, thread plug gauging, and optical profile inspection on critical features. This makes the product suitable for electrical terminals, fluid connectors, valve bodies, control panels, sensor housings, and custom OEM assemblies. The following parameters and tolerance ranges provide a technical reference for design engineers and purchasing teams.

• Material: C36000 (free-cutting brass), C37700, C38500, or C46400 naval brass
• Thread standards: UNC, UNF, UNEF, ISO metric, BSP, NPT, NPTF
• Thread sizes: M2 to M24, #2-56 to 1"-14
• Outer diameter: 0.125" to 2.000" (3.0 mm to 50.0 mm)
• Length: 0.187" to 3.000" (5.0 mm to 76.0 mm)
• Tolerance: ±0.0005" (±0.013 mm) on critical diameters, Class 2A/2B or 3A/3B threads
• Surface finish: Natural brass, nickel-plated, tin-plated, silver-plated, or custom
• Compliance: RoHS, REACH, and DFARS-compliant options available