CFR›Title 16›Chapter II›Part 1513›Appendix Figure 4 to Part 1513 CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Figure 4 to Part 1513—Neck Portion of “B” Section of Probe Enters Completely Into Opening Previous Figure 3 to Part 1513 Figure 3 to Part 1513—Motion of Test Probe Arrested by Simultaneous Contact With Both Sides of “A” Section of Probe and Boundaries of Opening