This is a Genuine Replacement Part ,The Model Number and Name for the Following Item: Whirlpool (WHIRA) 488130 Hex Nut for Fan Motor - Refrigerator.
OEM Part - Manufacturer #WP488130
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#8 NCH SS U-TYPE NUT
OEM Part - Manufacturer #488660
Compression nut
OEM Part - Manufacturer #WP486255