If you are unsure of the exact size you need, purchasing a bulk kit is often the most cost-effective solution for DIY and hobby projects.
: Sells a popular 200 Piece Assorted Spring Set for under $10, containing both extension and compression types. 3. Specialized Engineering Suppliers (Best for Precision)
: Offers various kits like the 390-Piece Compression Spring Assortment or the 96pcs Stainless Steel Extension Spring Set .
: A good source for "new old stock" or specific small lots of industrial-grade springs.
Buying small or miniature springs depends heavily on whether you need a single replacement, a varied assortment for hobbyist experimentation, or high-precision components for engineering.
and Lowe’s typically stock spring assortment kits (e.g., the Everbilt Spring Assortment ) in their hardware or "fasteners" aisle.
For common repairs like a pen spring or a small latch, local hardware stores carry basic assortments.