{"product_id":"silver-knurled-thumb-nut-gb806-m3-m6-double-step-hand-tighten","title":"Silver Knurled Thumb Nut GB806 M3–M6 Double Step Hand Tighten Nut","description":"\u003ch2\u003eSilver Knurled Thumb Nut GB806 — M3–M6 Double Step Hand Tighten Nut\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eGB806 silver knurled thumb nuts\u003c\/strong\u003e are designed for tool-free hand tightening in applications requiring frequent adjustment, quick-release assembly, or operator-accessible fastening. The double-step knurled body provides a secure grip for fingers even in gloved or oily conditions, making them the standard choice for 3D printer bed leveling, glass curtain wall adjustment, jig and fixture assembly, and any application where a screwdriver or spanner is inconvenient.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eGB806\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eSilver (natural \/ zinc-plated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Style\u003c\/td\u003e\n\u003ctd\u003eDouble step knurled cylinder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eMetric coarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize Range\u003c\/td\u003e\n\u003ctd\u003eM3, M4, M5, M6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive\u003c\/td\u003e\n\u003ctd\u003eHand (tool-free)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhy Choose GB806 Double Step Thumb Nuts?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble step knurled body\u003c\/strong\u003e — two-diameter stepped profile provides a natural finger grip point; easier to locate and turn than single-diameter knurled nuts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool-free operation\u003c\/strong\u003e — hand-tighten and loosen without screwdriver or spanner; ideal for frequent adjustment and quick-release applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGB806 standard\u003c\/strong\u003e — Chinese national standard for knurled thumb nuts; widely specified in 3D printing, jig, and fixture applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM3–M6 range\u003c\/strong\u003e — covers the most common sizes for 3D printer bed leveling (M3–M4) and curtain wall adjustment (M5–M6)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilver finish\u003c\/strong\u003e — clean, professional appearance for visible fasteners on equipment and fixtures\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e3D printer heated bed leveling (M3, M4 — Ender 3, Prusa MK3S, Bambu Lab, Creality)\u003c\/li\u003e\n\u003cli\u003eGlass curtain wall and glazing system adjustment (M5, M6)\u003c\/li\u003e\n\u003cli\u003eJig and fixture quick-release clamping (M4–M6)\u003c\/li\u003e\n\u003cli\u003eLaboratory and test equipment panel adjustment\u003c\/li\u003e\n\u003cli\u003ePhotography and camera rig quick-release mounting (M4–M6)\u003c\/li\u003e\n\u003cli\u003eElectronics enclosure access panel retention (M3–M5)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible With\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard metric coarse thread bolts and studs M3–M6\u003c\/li\u003e\n\u003cli\u003e3D printer bed leveling springs and standoffs (M3, M4)\u003c\/li\u003e\n\u003cli\u003eThreaded rod M3–M6 for jig and fixture assembly\u003c\/li\u003e\n\u003cli\u003eCaptive nut inserts in aluminium extrusion (M3, M4, M5, M6)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eGB806 silver knurled thumb nuts in selected size and quantity (per variant)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What size thumb nut do I need for 3D printer bed leveling?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: Most FDM 3D printers use M3 or M4 bed leveling screws. Ender 3 and Creality printers typically use M4. Prusa MK3S uses M3. Check your printer’s bed leveling screw size before ordering. GB806 M3 and M4 thumb nuts are direct replacements for the standard yellow thumb nuts supplied with most printers.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is the double step design?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The double step body has two different diameters — a larger lower step for initial grip and a smaller upper step for fine adjustment. This provides a natural ergonomic grip point and makes the nut easier to locate and turn than a single-diameter knurled nut.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Can these be tightened with a spanner if needed?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The knurled cylindrical body is not designed for spanner use. For applications requiring tool-tightening, use a standard hex nut instead. These are designed exclusively for hand tightening.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"Keszoox","offers":[{"title":"nickle plated \/ M3","offer_id":46895269019883,"sku":"14:10#nickle plated;5:200051330#M3","price":3.1,"currency_code":"USD","in_stock":true},{"title":"nickle plated \/ M4","offer_id":46895269052651,"sku":"14:10#nickle plated;5:200099163#M4","price":3.2,"currency_code":"USD","in_stock":true},{"title":"nickle plated \/ M5","offer_id":46895269085419,"sku":"14:10#nickle plated;5:200099271#M5","price":4.26,"currency_code":"USD","in_stock":true},{"title":"nickle plated \/ M6","offer_id":46895268987115,"sku":"14:10#nickle plated;5:200148165#M6","price":5.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/Silver_Knurled_Thumb_Nut_M3_GB806.webp?v=1758697985","url":"https:\/\/keszoox.com\/products\/silver-knurled-thumb-nut-gb806-m3-m6-double-step-hand-tighten","provider":"Keszoox","version":"1.0","type":"link"}