250PCS Nylon M3 Hex Column Male Standoff Spacer Screw Nut Assortment Kit (M3 male standoff A) Description: A standoff is a fastener that is used to create space between two objects, often to properly position them. In the world of electronic components and electronic hardware, standoffs are typically used to space circuit boards, panels, doors or gears. These standoff set includes screws and nuts, made of durable and long-lasting eco-friendly Nylon PA66 which has the characteristics of insulation, Non-Magnetic,thermal insulation,corrosion resistance, etc, and perfectly suitable for mounting between PCB circuit boards and machine boards and widely applied to the industries of communication, electroplating, medical device, office equipment, electronics, etc.  Clean pieces, no excess molding materials or anything to trim, snug fit, this is really an ideal set for your home projects! What are you waiting for? Get one set and make your life easier and more convenient! Feature: Made of durable eco-friendly nylon PA66 which has the stable and long-lasting performance of acid resistant, alkali resistant,  insulation and anti-signal interference.  Waterproof standoffs are rust resistant and easy to clean, you can simply clean them with a cloth. There are 4 different sets available for your building needs including a variety of male or female standoffs, nuts and screws. Ideal for mounting between PCB circuit boards and machine boards, working great for creating thermal channels between chips, or creating multistory 'nerd' arrays of home made circuit boards. They do not skid easily with appropriate use. Specification: Material: PA66 Nylon Thread Type: M2, M3 Color: Black Package  A  B C  D Male-female Standoff M3*6+6mm        25pcs M2*5+3mm         25pcs M3*8+6mm        25pcs M2*6+3mm         25pcs M3*10+6mm      25pcs M2*8+3mm         25pcs M3*12+6mm      25pcs M2*10+3mm        25pcs M3*15+6mm      25pcs M2*12+3mm        25pcs M3*20+6mm      25pcs M2*15+3mm        25pcs Female-female Standoff M3*6mm         25pcs M2*5mm         25pcs M3*8mm         25pcs M2*6mm         25pcs M3*10mm        25pcs M2*8mm         25pcs M3*12mm        25pcs M2*10mm        25pcs M3*15mm        25pcs M2*12mm        25pcs