Threaded M3 hex standoff female to female they are usually round or hex (for wrench tightening), often made of aluminum, brass, or nylon, and come in male-female or female-female forms.
M3 Knurled Thread Brass Insert Nuts are made of brass, knurled for a good anti-slip effect.They used by hot melt, hot pressure, and injection molding embedded processing technology, play a role in connection, locking, tightening.
Brass inserts for plastic injection molding The main purpose is to inject the product into some plastic parts, which can form an effective internal thread on the plastic part after installation.