A 3mm x 20mm nylon screw is an M3 x 20mm metric machine fastener featuring a 0.5mm thread pitch. Made from durable, lightweight thermoplastic (usually Nylon 6/6), it offers exceptional electrical insulation, chemical resistance, and non-magnetic properties, making it ideal for electronics.

Diameter (Size): 3mm (M3)
Length: 20mm (measured from under the head)
Thread Pitch: 0.5mm (standard coarse for M3)
Material: PA66 Nylon (Flame retardant and non-corrosive)
Common Head Styles: Pan head, countersunk, or socket head
Drive Types: Phillips, slotted, or hex socket