NNP

Stem and Clasp.  A pin, hinged on one end and with a mechanism in place to fasten the other end, all of which is soldered to the back of a medallic item. A stem and clasp is used to fasten the item, as a pin or badge, securely to a garment or headgear.  See mounting.

excerpted with permission from

An Encyclopedia of Coin and Medal Technology

For Artists, Makers, Collectors and Curators

COMPILED AND WRITTEN BY D. WAYNE JOHNSON

Roger W. Burdette, Editor