socket fuse
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plug fuse

plug fuse
1. A fuse mounted in an insulated porcelain container fitted with a threaded, metal screw base; has a small window on the face of the fuse for observing the condition of the fuse element.
2. An Edison-base fuse or a type-S fuse.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.