Definition: Compression springs used to push a retractable ballpoint pen out of its case and return back into the case. Used for click mechanisms.
Ballpoint Pen Spring - Ball Pen Compression Springs for Platignum Ball Pens
Springs, Fall 2021, Vol 60 No 4 by Spring Manufacturers Institute - Issuu
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Springs for Ballpoint Pens Compression Spring Over 70 Trillion spring designs
Spring Loaded Applications Compression Spring Over 70 Trillion spring designs
IMPRINT 30 Count, Multipurpose Springs, Size Equals to General Pen Springs : Office Products
