7/8/1991 Protest number 3004-0-000237; flat-rolled steel rings;Subheading 7225.90.00; Heading 7225; Chapter 72, note 1(f);Chapter 72, note 1(k); Subheading 7225.30; Subheading 7225.40;Subheading 8436.99.00; Subheading 8431.10.00; Explanatory Note72.25; Subheading Explanatory Notes to Subheading 7225.30 and7225.40; Subheading Explanatory Notes to Subheading 7225.50;Section XVI, note 2(b); General Rule of Interpretation 2(a);General Rule of Interpretation 2(a), Explanatory Note (II). 10/29/2001 Protest 5301-99-100246; Spelter Sockets; Turnbuckles 6/19/1997 PRD 2704-96-103184; Tire Locking Chock, Apparatus for Locking Tandem Wheels in Place to Keep Them From Turning; Wedge Jack, Heading 8425; Threaded Rod Between Base Metal Plates With Reverse Threads and Nuts; Parts of Jacks, Heading 8431; Articles of Iron or Steel 3/31/2021 Internal Advice; Tariff Classification of a Steel Tube