Stainless Steel 303 Dowel Pins
Free-machining austenitic stainless — good corrosion resistance.
303 is the free-machining austenitic stainless: a sulphur addition breaks the chip and lets it be turned faster and cleaner than 304 or 316. That makes it a sensible default whenever a pin needs to be stainless but is not going to live in salt or cleaning chemistry. The same sulphur that helps the cut costs some corrosion resistance, so it is the wrong pick for anything repeatedly autoclaved.
303 is the sensible default for stainless pins that are not going anywhere corrosive: jigs, general assemblies, and anything where the drawing says "stainless" without saying why. It machines faster than its neighbours, which keeps the cycle time down.
Any size, not a series
There is no size list here because there is no catalogue: diameters run from 0.015" to 0.375", including sizes between two standard ones, and lengths from 0.02" to 4" — turned to order rather than cut down from a stock pin and re-finished. Pricing in Stainless Steel 303 starts at $2.86 per piece at 100 off, and falls further at higher volumes.
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