# How to Specify S694ZZ Without Mixing Nearby Parts
Look-alike part numbers are the usual way a stores ticket goes wrong on a stainless steel miniature deep groove ball bearing. Do not substitute a chrome-steel 694ZZ or a nearby S693/S695 size. Shields (ZZ) and stainless rings are the usual reasons this model is chosen for medical-adjacent duty. Measure the miniature envelope before issuing stock.
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S694ZZ is listed as a stainless steel miniature deep groove ball bearing. Because a public millimetre sheet is thin on some catalog pages, confirm bore, outside diameter, and width against your drawing or the live product listing.
Review S694ZZ bearing on the TFL Bearing Made-in-China listing. Shandong TFL Bearing Co., Ltd can confirm stock, packing, and any OEM marking once the drawing or sample is attached.