The thermal extremes of space are severe, and can easily render a simple zip tie to be useless. Another issue is the potential for materials (plastics are a par

The thermal extremes of space are severe, and can easily render a simple zip tie to be useless. Another issue is the potential for materials (plastics are a particular headache) to offgass in a vacuum, which can send nasty contamination into places that it shouldn't be (like sensitive instruments). They actually test these components in vacuum chambers while thermally cycling the assemblies to figure this out.