Specification : Material: 304 Stainless Steel; Thread: M3; Thread Pitch: 0.5mm/0.016"; Stud length: 50mm/1.97"; Screw length: 6mm/0.24"; Overall Size: 56mm x 4.9mm/2.2" x 0.19" (L*W); Packing List:10pcs 50mm+6mm Standoffs Advantage: The standoff screws are made of stainless steel, which is rust-free, durable, stable, and reusable compared with plastic. Instruction: Specially designed to keep PCB at a consistent height and prevent it from bending, twisting, and short-circuiting. Application: Our standoff screws are widely used in computers, computer cases, circuit board assembly and other electronic fields. The PCB standoffs play a supporting, isolating and fastening role in the use. NOTE: Please measure the required length of your project, and then select the appropriate standoffs to save your time and effort.