Brass Inserts
Precision brass inserts for plastics, built to print — the reliable threaded interface behind assembled devices. Kedar Hub supplies threaded, heat-set, ultrasonic, press-fit, molded-in, knurled and self-tapping inserts, manufactured in Jamnagar, India and delivered duty-paid to your U.S. facility.
Types we supply
Every brass insert, for every substrate.
Matched to your plastic, installation method and load — standard styles or fully custom knurl patterns to your drawing.
Install by Heat / Sound
- Heat-Set Inserts
- Ultrasonic Inserts
- Thermoplastic Inserts
- 3D-Printing Inserts
Install by Force
- Press-Fit Inserts
- Self-Tapping Inserts
- Expansion Inserts
- Knurled Inserts
Mold-In & Board
- Molded-In Inserts
- Injection-Molding Inserts
- PCB Inserts
- Blind & Through-Hole
Threaded & Special
- Threaded Inserts
- Wire Thread (Helical)
- Threaded Standoffs
- Captive / Panel Inserts
- Custom Inserts
Where they're used
Applications & industries served.
Applications / substrates
- Injection-molded plastics
- Thermoset & thermoplastic
- 3D-printed parts
- Die-cast & composites
- PCB & electronics housings
- Enclosures & consumer devices
Industries served
- Electronics & consumer devices
- Automotive & EV
- Medical devices
- Telecom & IoT
- Appliances
- Aerospace & defense
See all the sectors we serve on our Industries page.
Brass grades for inserts
Certified brass, traceable by lot.
Free-machining brass for clean knurls and threads; low-lead grades where compliance requires it. See full quality & traceability →
Free-Cutting Brass
C36000 · CW614N — standard inserts, crisp knurling
CZ121 / CuZn39Pb3
Excellent machinability for fine threads
Low-Lead & Eco Brass
Medical, food-contact & RoHS compliance
Custom Alloys
Matched to your drawing or specification
How they're made
Manufacturing process.
Bar stock
Certified free-cutting brass bar selected for machinability and thread quality.
CNC turning
Bodies turned on CNC and Swiss lathes to precise OD, length and internal bore.
Knurling & threading
External knurl patterns for retention and internal threads tapped and gauged.
Inspection & test
Dimensional, thread and (on request) pull-out/torque validation before packing.
*on request, tested in your substrate. Threads: UNC · UNF · Metric · custom.
Finishes, inspection & packaging
Delivered ready to install.
Surface finishes
- Natural brass
- Nickel-plated
- Tin-plated
- Bright-dipped
- Anti-tarnish
Inspection
- Thread gauge
- Dimensional (FAI)
- Knurl & OD check
- Bore concentricity
Testing
- Pull-out / jack-out
- Torque-out
- Installation trial
- Material verification
Packaging
- Bulk / poly-bagged
- Counted packs
- Tape & reel (small)
- Custom-labeled
Documentation ships with the order. See our full quality standards →
Custom brass inserts
Built to your boss & drawing.
Send your plastic type, boss geometry and load requirement — or a sample — and we'll build the right insert to print, with the correct knurl, length and thread, from prototype to high-volume production.
- Reverse engineering from sample
- Custom knurl patterns
- Special lengths & threads
- Prototype to high-volume
Brass inserts FAQ
Questions, answered.
What is the difference between heat-set and ultrasonic brass inserts?
Both install into plastic by melting it around the insert. Heat-set inserts are pressed in with a heated tip and are ideal for thermoplastics and 3D-printed parts; ultrasonic inserts use high-frequency vibration for fast, high-volume assembly. We supply both, plus press-fit and mold-in styles.
Which brass insert should I use for injection-molded plastic?
For molded-in applications, use mold-in inserts placed in the tool before molding. For post-mold assembly, heat-set or ultrasonic inserts are most common. Send your plastic type and boss dimensions and we'll recommend the right style and knurl pattern.
Do you perform pull-out and torque testing on brass inserts?
Yes. Inserts can be pull-out (jack-out) and torque-out tested in your substrate to validate retention, with test reports supplied on request.
What sizes and threads do you make brass inserts in?
Common sizes run from M2 to M12 and #2 to #10-32 UNC/UNF, with metric and imperial internal threads. Custom sizes, knurl patterns and lengths are made to your drawing.
Are lead-free brass inserts available for medical or food-contact use?
Yes. Low-lead and eco-brass grades are available for medical, food-contact and RoHS-compliant applications, with documentation provided.
Related: Brass Fasteners · Brass Electrical Components · How ordering works
Need brass inserts?
Send your drawings, plastic type or a sample. We'll recommend the right insert, brass grade and finish — delivered duty-paid to your dock.
Request a Quote