Brass Inserts

About Brass Inserts

Brassmoulding inserts are specialized threaded fasteners designed to beembedded into plastic parts—typically via heat, ultrasonic, or in-mouldtechniques—to provide strong, permanent, and wear-resistant metal threads. Theyenhance durability, support high pull-out loads in industries like automotive,electronics, and medical devices. 

DetailedDescription of Brass Moulding Inserts

• Core Material: Fabricated from high-grade brass (ASTM B 124 C37700 or BS 2874 CZ 122), offering excellent corrosion resistance, high tensile strength, and good thermal conductivity. 
• Design Features:
• Knurling: Most inserts feature diamond or straight knurling to enhance grip and prevent rotation within the plastic.
• Shapes: Typically, round or hexagonal.
• Types: Available in blind (closed end) to prevent plastic seepage, or through-hole (open end) for long bolts. 
• Installation Methods:
• Heat/Ultrasonic Insert: Installed after molding by melting the plastic around the insert using heat or ultrasonic waves.
• In-Mold Inserts: Placed into the mold before injection, allowing plastic to flow around them.
• Press-In/Self-Tapping: Pushed or threaded into a pre-molded hole without additional heat. 
• Advantages: Provide high torque resistance, allow for repetitive assembly/disassembly, and are corrosion-resistant. 
• Applications: Crucial in assembling consumer electronics, automotive interiors, furniture, and plastic enclosures. 

MaterialGrade & Standards:
Commonly made from free-cutting brass (C36000), offering superior machinabilityfor detailed knurls. 

CommonConfigurations:

• Straight Knurled Inserts: Often used for press-in.
• Diamond Knurled Inserts: Ideal for heat-set and ultrasonic installation.