{"product_id":"electro-hardware-mmf1329m03f21m3-hex-standoff-m3","title":"Electro Hardware MMF1329M03F21M3 Hex Standoff M3","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE MMF1329M03F21M3 is a male-female hex circuit board standoff designed to create precise spacing between PCBs and mounting surfaces in electronic assemblies. The standoff features an M3 x 0.5 thread on both ends  -  a male thread on one side and a female threaded bore on the other  -  allowing boards to be stacked or secured in a fixed, repeatable position. The hex body measures 4.5 mm across flats for wrench engagement. Overall length is 23.76 mm, with a body length of 19.00 mm and a thread depth of 6.40 mm on the female end. Constructed from brass with a zinc-plated finish conforming to ASTM B633 Type 1 and QQ-B-626 Comp 22, this standoff delivers corrosion resistance suitable for long-term installation inside control panels and enclosures.\u003c\/p\u003e\n\u003cp\u003eThis standoff is used in electronic and electrical control assemblies where circuit boards must be mounted at a fixed height above a panel or stacked in a multi-board configuration. Typical applications include HVAC control boards, industrial relay panels, variable-frequency drives, and general PCB enclosures. The metric M3 x 0.5 thread sizing is common in commercial and light industrial electronic equipment. Installers working with metric fastener systems will find this standoff a direct fit for standard M3 threaded mounting points on circuit boards and chassis.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMale-female configuration allows board stacking and panel mounting in a single fastener\u003c\/li\u003e\n  \u003cli\u003eHex body at 4.5 mm across flats accepts standard metric wrenches and nut drivers for secure torquing\u003c\/li\u003e\n  \u003cli\u003eBrass base material with zinc-plated finish provides corrosion resistance in enclosed environments\u003c\/li\u003e\n  \u003cli\u003eMeets ASTM B633 Type 1 and QQ-B-626 Comp 22 finish standards\u003c\/li\u003e\n  \u003cli\u003eOverall length of 23.76 mm with a length tolerance of -0.150 to 0.150 mm for consistent board spacing\u003c\/li\u003e\n  \u003cli\u003eM3 x 0.5 metric thread sizing compatible with standard PCB mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard M3 x 0.5 male-female hex standoff suitable for circuit board mounting and stacking applications in electronic assemblies using metric fastener systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePower down and de-energize the equipment completely before servicing any circuit board mounting hardware. Use an appropriate metric nut driver or open-end wrench sized for 4.5 mm across flats to install and tighten the standoff without over-stressing the PCB. Minimum order quantity for this part is 10 units  -  confirm required quantity before ordering. Follow applicable electrical codes and manufacturer assembly documentation when mounting control boards in panel enclosures.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M3 x 0.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Male and Female\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 23.76 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 19.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Depth (Female End)\u003c\/strong\u003e: 6.40 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length (Male End)\u003c\/strong\u003e: 4.76 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 4.5 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Hex\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: -0.150 to 0.150 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASTM B633 Type 1, QQ-B-626 Comp 22\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Metric\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.00736 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ELECTRO HARDWARE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: MMF1329M03F21M3\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51743198708018,"sku":"MMF1329M03F21M3","price":22.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/058618b61ed1e7530ddb8e1d1ac45e5b_f69dd92c-9cae-4c0b-aef3-97362a3d10bd.jpg?v=1788843875","url":"https:\/\/voomisupply.com\/products\/electro-hardware-mmf1329m03f21m3-hex-standoff-m3","provider":"Voomi Supply","version":"1.0","type":"link"}