CFR › Title 46 › Part 164 › §164.023-946 CFR §164.023-9Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkApplication samples. A product sample submitted for acceptance as required by § 164.019-7(c)(4) must consist of at least one unit of put-up of thread.