About Blind Brass Insert

High-Precision Brass Blind Inserts | Closed-End Brass Threaded Inserts | Leak-Proof Molding Inserts Manufacturer

Premium Product Description:

Overview: We are a premier manufacturer, supplier, and global exporter of high-quality Brass Blind Inserts (also known as Closed-End Brass Inserts). These specialized threaded fasteners are precision-engineered for applications where complete sealing is required to prevent the ingress or egress of plastic resin, liquids, dust, or gases during and after the injection molding process.

Design & Mechanics: The defining feature of our Brass Blind Inserts is their solid, closed-bottom construction. Unlike standard through-threaded inserts, the blind-hole design ensures that the mating screw cannot penetrate past the bottom of the insert. This completely eliminates the risk of plastic overflow into the internal threads during high-pressure injection molding, saving valuable post-production cleaning time.

To deliver exceptional torque-out and pull-out resistance, the outer diameter is machined with high-grade diamond or straight knurling patterns. These Closed-End Knurled Inserts establish a permanent, immovable grip within the plastic boss or housing. Manufactured on state-of-the-art automatic lathes and CNC turning centers, every piece features clean, burr-free internal threads and flawless dimensional accuracy.

Technical Product Specifications:

• Product Nomenclature: Brass Blind Inserts, Closed-End Threaded Inserts, Blind-Hole Molding Inserts, Leak-Proof Brass Bushes.

• Material Grades: Premium Free Cutting Brass (IS 319 Type I, CZ121, CuZn39Pb3, or RoHS Compliant Lead-Free Alloys).

• Thread Availability: ISO Metric (M3 to M16 standard sizes), UNC, UNF, BSW.

• Thread Fit Class: High-precision 6H medium class fit or custom tolerances up to 0.01 mm.

• Base Design: Solid Closed Bottom (Blind Hole) with Straight, Diamond, or Helical Knurling.

• Surface Finishing: Clean Natural Brass Polish, Bright Nickel Plated, or Tin Plated for maximum corrosion protection.

Key Industrial Applications:

• Automotive & Fuel Systems: Ideal for fluid reservoirs, fuel tanks, and under-hood components where zero-leakage is mandatory.

• Water Purification & Plumbing: Used heavily in water filter housings, valves, and water meters to prevent leakage under pressure.

• Outdoor Electronics: Perfect for sealed electrical enclosures and junction boxes requiring IP-rated dust and moisture protection.