{"product_id":"electro-hardware-1427m03f21-440-hex-standoff-4-40-7-16-in","title":"Electro Hardware 1427M03F21-440 Hex Standoff 4-40 7\/16 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE 1427M03F21-440 is a male-female hex circuit board standoff designed to separate and support PCBs within electronic enclosures and control panels. This fastener features a 4-40 threaded male post on one end and a 4-40 threaded female receptacle on the other, allowing boards to be stacked or mounted at a fixed, repeatable distance. The body measures 0.25 inches in length with an overall length of 0.4375 inches (7\/16 inch). The hexagonal body profile measures 0.25 inches across the flats for easy wrench engagement. Constructed from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff delivers corrosion resistance suitable for indoor electronic assemblies.\u003c\/p\u003e\u003cp\u003eThis standoff is commonly used in HVAC control boards, electrical enclosures, industrial control panels, and other applications where printed circuit boards require secure, isolated mounting. The male-female configuration allows daisy-chain stacking of multiple boards or mounting a single board to a chassis at a consistent 7\/16-inch standoff height. Technicians assembling or servicing control panels in commercial or residential HVAC equipment, electrical distribution hardware, or custom electronic builds will find this standoff a reliable off-the-shelf component for 4-40 threaded mounting patterns.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMale-female thread configuration supports PCB stacking and single-board chassis mounting\u003c\/li\u003e\n\u003cli\u003e4-40 thread size on both male post and female receptacle\u003c\/li\u003e\n\u003cli\u003eHexagonal body at 0.25 inches across the flats allows wrench or nut-driver installation\u003c\/li\u003e\n\u003cli\u003eOverall length of 0.4375 inches (7\/16 inch) with a thread length of 3\/16 inch and body length of 0.25 inches\u003c\/li\u003e\n\u003cli\u003eBrass construction with zinc-plated finish per ASTM B633 Type 1 and QQ-B-626 Comp 22\u003c\/li\u003e\n\u003cli\u003eLength tolerance held to -0.005 to +0.005 inches for consistent board-to-board spacing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in any application requiring a 4-40 male-female hex standoff in the inch measurement system, including circuit board assemblies, control panels, and electronic enclosures where 7\/16-inch board separation is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by technicians assembling or servicing electronic control panels and PCB assemblies. Power down and de-energize all circuits before working inside any control enclosure. Use an appropriately sized nut driver or hex wrench on the 0.25-inch across-flats body to tighten without deforming the standoff. Avoid over-torquing brass standoffs, as the material is softer than steel and thread damage is possible with excessive force.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Male\/Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 0.4375 inches (7\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.25 inches (1\/4 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 3\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Depth (Female)\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.25 inches (1\/4 inch)\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: -0.005 to +0.005 inches\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: Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 1427M03F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51749677531442,"sku":"1427M03F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b0229b6c668c391f2e8def04cb88c97f.jpg?v=1788909095","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1427m03f21-440-hex-standoff-4-40-7-16-in","provider":"Voomi Supply","version":"1.0","type":"link"}