# How to Specify S71916ACEGA/HCP4A Without Mixing Nearby Parts
Look-alike part numbers are the usual way a stores ticket goes wrong on a high-precision spindle angular contact bearing. Do not substitute a standard 71916 or a different preload/contact-angle suffix. P4 and P2 precision grades are discussed for this spindle series. Confirm preload, contact angle, and hybrid vs steel balls on the drawing.
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S71916ACEGA/HCP4A is listed as a high-precision spindle angular contact 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 S71916ACEGA/HCP4A 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.