As the most expertised manufacturer of threaded inserts and precision components in China, Sandum ("In-saiL") have supported many famous EMS companies like Foxconn, Flextronics, and many automotive subassembly companies for Audi, BWM, WV, etc.

Our threaded inserts includes almost all of the industrial applications, there are threaded inserts for plastics, threaded inserts and wire inserts for metals, self-tapping inserts for cast irons and alloys, threaded blind rivets and self-clinching fasteners for closures or sheet metals. Also there are zinc alloy based threaded inserts for wood and furnitures. We are the most expertised fastener solution provider in China!

Besides our fastener solutions, we are also known as a precision components maker. We can provide CNC lathing, CNC milling and complex machining, as well as auto lathe turning works according to customer drawings.