{"product_id":"m3x6-button-head-screws-black","title":"M3x6 Button Head Hex Socket Screws - Black Alloy Steel","description":"\u003cdiv class=\"nznpd\"\u003e\n\u003cdiv class=\"nznpd__lead\"\u003e\n\u003cp class=\"nznpd__intro\"\u003eA button head screw has a low, rounded head with a hex socket in the top. It sits lower and looks tidier than a standard cap screw. These are M3x6 in black alloy steel, so they blend into a black 3D printed case, a dark panel or a black PCB.\u003c\/p\u003e\n\u003cp class=\"nznpd__intro\"\u003eThey're for indoor builds. The black finish is thin, so outdoors or anywhere damp they can rust. For outside, use the \u003ca href=\"\/products\/m3-button-head-screws-304-stainless\"\u003e304 stainless M3x6\u003c\/a\u003e instead. The 6mm length is the thread under the head, which is enough to go through a 1.6mm PCB into a nut, or to hold a lid onto a heat-set insert.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__specs\"\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eThread\u003c\/span\u003e\u003cstrong\u003eM3 x 0.5mm, standard metric\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eLength (under the head)\u003c\/span\u003e\u003cstrong\u003e6mm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eOverall length\u003c\/span\u003e\u003cstrong\u003eAbout 7.7mm with the head\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eHead\u003c\/span\u003e\u003cstrong\u003eButton (low dome), hex socket\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eHead size\u003c\/span\u003e\u003cstrong\u003eAbout 5.7mm across, 1.65mm tall\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eHex key\u003c\/span\u003e\u003cstrong\u003e2mm (not included)\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMaterial\u003c\/span\u003e\u003cstrong\u003eAlloy steel, magnetic\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eFinish\u003c\/span\u003e\u003cstrong\u003eBlack, for indoor use\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMinimum order\u003c\/span\u003e\u003cstrong\u003e5 screws, priced per screw\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003cdiv class=\"nznpd__qs\"\u003e\n\u003ch3\u003eChoosing and fitting\u003c\/h3\u003e\n\u003col class=\"nznpd__steps\"\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eCheck the length\u003c\/strong\u003e\u003cp\u003eThrough a 1.6mm PCB into a standoff, 4.4mm of thread goes in, so the standoff needs a thread at least that deep. Through the same PCB with an \u003ca href=\"\/products\/metric-hex-nuts-m2-m3-m4-m5-stainless-steel\"\u003eM3 hex nut\u003c\/a\u003e on the back, about 2mm shows past the nut.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eUse a 2mm hex key\u003c\/strong\u003e\u003cp\u003eButton heads take a 2mm hex key, one size down from the 2.5mm key an M3 cap screw takes. Push the key all the way into the socket and stop once the screw is snug. The socket is shallow, so a key that slips or a lot of force will round it out.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eInto plastic, fit an insert first\u003c\/strong\u003e\u003cp\u003eAn M3 thread cut straight into a 3D print holds at first, then wears loose after the screw has been in and out a few times. Fit an \u003ca href=\"\/products\/m3-brass-heat-set-insert-3d-printing-5mm\"\u003eM3 heat-set insert\u003c\/a\u003e and the screw goes into brass instead.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n","brand":"NZN Electronics","offers":[{"title":"Default Title","offer_id":67775418171488,"sku":"FST-BHCS-M3X6-BLK","price":0.35,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/FST-BHCS-M3X6-BLK_01-hero_v2_transparent.png?v=1794537711","url":"https:\/\/www.nznelectronics.co.nz\/products\/m3x6-button-head-screws-black","provider":"NZN Electronics","version":"1.0","type":"link"}