Stainless Steel Parts We Machine
Representative stainless part families from recent production, including the thin-wall medical and semiconductor work our floor is known for.
Part Families, Tolerances, Order Patterns
| Part family | Common materials | Key tolerances | Typical finish | Typical order |
|---|---|---|---|---|
| Thin-wall semiconductor core parts | SUS304 | 0.3 mm wall, GD&T within 0.01 mm | Ra 0.4, cleaned | repeat batches |
| Endoscope tube components | SUS316L | ID/OD +/-0.01 mm, Ra 0.4 inner | Electropolish ready | 100 to 1,000 pcs |
| Surgical instrument bodies | 17-4PH, 420 | +/-0.01 mm seats, HRC 40-50 | Passivation | 200 to 2,000 pcs |
| External fixator rods and clamps | SUS316L | +/-0.02 mm threads and seats | Passivation | ISO 13485 documented |
| Valve needles and seats | 440C | hardened HRC 58-60, roundness 0.002 mm | Ground finish | 500 to 5,000 pcs |
| Optical lens barrels | SUS304, 303 | Concentricity 0.005 mm, Ra 0.4 bores | Bare or blackened | 50 to 500 pcs |
| Manifold blocks, corrosion service | 316L | Port position +/-0.02 mm, leak tested | Passivated | 50 to 300 pcs |
| Pump shafts and impellers | 316L, 17-4PH | Journal +/-0.005 mm after grind | Passivated | 100 to 1,000 pcs |
| Food equipment components | SUS304, 316L | Ra 0.8 wetted surfaces | Passivated, food safe | 500 to 5,000 pcs |
| Fittings, NPT/BSPP threaded | 303, 316L | Thread gauge 100 percent | Passivated | 1,000 to 10,000 pcs |
How to use this page: these are families we run repeatedly, so process risk is low and lead times are predictable. If your part is not listed, it is likely still in scope: send the drawing and we answer within 24 hours.
See medical typical parts and semiconductor typical parts for industry views.
Stainless Steel Parts FAQ
303 or 304 for small fittings?
303 when machinability leads on small threaded parts; 304 when welding or corrosion exposure matters more. Both are stocked and certificate backed.
Can you passivate and certify stainless parts?
Yes, passivation per ASTM A967 is coordinated with RoHS and REACH declarations available per shipment.
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