Some information on peened and threaded tangs, from a modern day armorer:
Arms & Armor was founded in 1982, and is owned and operated by Christopher Poor. Chris has had a life-long interest in weapons and armor, reflected in his time spent as a professional jouster. This first-hand experience, plus scholarly research, provides a working knowledge of weapons and armor that few others achieve.
Arms & Armor crafts a wide variety of items, with the majority of work done in the Medieval and Renaissance styles. Each replica is researched and modeled from examples found in museums, private collections, and other historical sources. Our goal at Arms & Armor is to recreate the look and feel of the original in all respects. Literally to allow you, the customer, to get the best replica available today. A 16th century person would, hopefully, not quickly recognize a difference between one of our reproductions and a piece made in their own time.
(snip)
Some of your weapon descriptions mention a 'tang'; beside being a popular artificial fruit drink what is a tang?
The tang is the portion of the blade that is covered by the cross guard, grip and pommel. It is traditionally of a tapering profile which passes through the above items and was peened over on the top of the pommel to hold it all together. The tangs on our swords are quite sturdy by comparison to original swords which were often quite narrow and thin. Most original swords have an upper section of softer metal welded to the top of the sword which included a few inches of the blade and the tang.
Many modern tangs are pieces of threaded rod which are welded to a stub tang which is often less than an inch in length. These type of hilts are notorious for breaking at the weld point. You should always check the tang construction on a sword if you are concerned about its usability.