We supply these custom aerospace compression springs to our aerospace components manufacturing customer. 17-7PH stainless steel material is used for the domestic production of these parts, per AMS 5673-F. Our production runs are typically in the smaller 500 piece quantity range for this specific spring, with lead time at 8-10 weeks. That lead time includes passivation per AMS QQ-P-35, and penetrant inspection per ASTM E 1417 Type I, Method A, Sensitivity L-3. Each one of those two processes typically takes about 1 week to complete.