Yes, Schedule 10 stainless steel pipe can be threaded. However, it's important to note that stainless steel, particularly austenitic grades like 304 and 316, can work-harden during machining processes like threading. Therefore, it's crucial to use appropriate cutting tools and techniques to avoid damaging the material and ensure proper thread formation.

When threading stainless steel pipe, it's advisable to use sharp cutting tools specifically designed for stainless steel and to apply cutting lubricants to reduce friction and heat buildup. Additionally, maintaining proper thread depth and pitch is essential for ensuring a tight and leak-free seal when connecting threaded components.

If you're not experienced in threading stainless steel or working with similar materials, it might be a good idea to consult with a professional or seek guidance from someone with expertise in this area to ensure the job is done correctly and safely.