Nylon material, single hex head, male female type threaded, and it is ideal for mounting between PCB circuit boards and machine boards.,
50pcs M4 25+6mm Male Female Thread Nylon Hex Standoff Spacer Screws Black
25/50/100pcs Black Plastic Nylon M3 Hex Column Standoff Support Spacer Screw Nut
50pcs M2/M2.5/M3/M4*L+6mm Thread Black/white Spacing Screw Plastic For PCB Motherboard Fixed Nylon Standoff Spacer Pillar - AliExpress
20-50pcs M2 M2.5 M3 M4 M5 M6*L black nylon spacer female to female nylon hex standoff
50pcs M4 Male x Female 19mm+6mm Nylon Spacer Hex Standoff Pillar for PCB Board : Industrial & Scientific
50pcs M2 M2.5 M3 M4 PCB Motherboard Black Nylon Plastic Phillips Screw Male-Female Female Hex Standoff Hexagon Pillar Spacer
50Pcs M3*5/6/8/10/12/14/16/18/20/25+6mm Hex Nut Spacing Screw Brass Threaded Pillar PCB Computer PC Motherboard Standoff Spacer - Price history & Review, AliExpress Seller - Sunny Business
20/ 50pcs White Plastic Nylon Hex Hexagon Standoff Spacer Male-Female Phillips Pan Round Head Screw Nut M2 M2.5 M3 M4 M5
50pcs/lot M3*L L=5mm to 50mm Female Female black Hex Threaded Spacer Standoff PA66 Nylon Standoff For PCB Circuit Boards