{"product_id":"er20-a-collet-clamping-nuts-for-cnc-milling-chuck","title":"ER20 A Collet Clamping Nuts For CNC Milling Chuck Holder Lathe 4 Pack Black Finish, Precision Ground And Hardened 40CR Steel, Replacement Part That Fits Most Tool Holders, Easy Install For Reliable Spindle Performance","description":"\u003cdiv\u003eER20A Collet Clamping Nuts for CNC Holders, 4-Pack\u003cbr\u003e\n✔️ 4 x M25 ER20A nuts, precision ground, hardened 40CR steel \u003cp\u003eThese ER20A clamping nuts are precision-made replacements for ER style tool holders used on CNC milling and turning setups. Built from hardened 40CR steel with a black oxide finish, they’re designed to restore secure grip and smooth spindle performance in everyday machining tasks.\u003c\/p\u003e \u003cp\u003e✅ Material: 40CR steel with black oxide finish \u003cbr\u003e✅ Finish: precision ground and hardened for long life \u003cbr\u003e✅ Size and fit: M25 ER20A nut for replacement of worn parts \u003cbr\u003e✅ Compatibility: fits ER type tool handles, boring cutters, tool bars, extension bars, and drill bits \u003cbr\u003e✅ Pack content: 4 nuts in a 4-pack \u003cbr\u003e\u003c\/p\u003e \u003cp\u003e💡 What is an ER collet nut used for and how does it help CNC machining?\nThis handy part secures the tool in the holder and reduces runout.\n- How it works: locks ER20A collets to maintain alignment\n- Benefits: tighter grip, improved tool retention and spindle reliability\n- Compatibility: fits most ER type tool handles, boring cutters, tool bars\n- Materials: hardened 40CR steel with black oxide for durability\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":48077520961771,"sku":"VXB08YWJHNKT","price":49.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/61jTw1QhSWL.jpg?v=1775866899","url":"https:\/\/vxb.com\/products\/er20-a-collet-clamping-nuts-for-cnc-milling-chuck","provider":"VXB Bearings","version":"1.0","type":"link"}