2-Pack 503220001 Flange Nut Replacement for Echo CS-520 (C09312001001 - C09312999999) Chainsaw - Compatible with 503 22 00-01 Flanged Bar Nuts

2-Pack UpStart Components Replacement 503220001 Flange Nut for Echo CS-520 (C09312001001 - C09312999999) Chainsaw Please note: This is an UpStart Components Brand replacement part NOT an OEM product. All mentions of brand names or model descriptions are made strictly to illustrate compatibility. All brand names and logos are registered trademarks of their respective owners. This product is not affiliated with any brands and is not covered under any warranties offered by the original manufacturers. Any warranties for this product are offered solely by UpStart Components.