{"product_id":"electro-hardware-1427m12f21-440-hex-standoff-4-40","title":"Electro Hardware 1427M12F21-440 Hex Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE 1427M12F21-440 is a male-female hex circuit board standoff designed to create fixed spacing between stacked PCBs or between a board and a chassis panel. The body is machined steel with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-S-633 standards, giving it solid corrosion resistance for indoor electronic assemblies. The hex body profile allows standard wrench engagement during installation and removal. Overall length is 7\/16 inches (0.4375 inches), with a 1\/4-inch hex body and a 3\/16-inch male thread projection. Thread size is 4-40, the most common pitch used in light-duty PCB mounting hardware. This standoff is suited for electronics technicians, field service engineers, and industrial maintenance professionals working on control boards and electronic assemblies.\u003c\/p\u003e\u003cp\u003eThis standoff is used in residential and commercial electronic control panels, HVAC control boards, and general-purpose circuit board mounting applications wherever 4-40 threaded hardware is specified. The male end threads into the receiving board or chassis, while the female end accepts the next board-level fastener, maintaining a consistent stack height equal to the overall standoff length. It is typically installed in environments where boards must be stacked or elevated above a mounting surface for clearance, airflow, or vibration isolation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 male-female thread configuration for standard PCB stacking applications\u003c\/li\u003e\n\u003cli\u003eHex body shape allows wrench engagement for secure, controlled installation\u003c\/li\u003e\n\u003cli\u003eZinc-plated steel construction meets ASTM B633 Type 1 and QQ-S-633 standards\u003c\/li\u003e\n\u003cli\u003eOverall length of 7\/16 inches provides precise board-to-board or board-to-chassis spacing\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel material with length tolerance of -0.005 to +0.005 inches for consistent fitment\u003c\/li\u003e\n\u003cli\u003eBody length and thread depth each measure 1\/4 inch for balanced male-female engagement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard component for circuit board assemblies using 4-40 threaded hardware in inch-measurement fastener systems.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics or instrumentation technicians using a hex wrench or nut driver sized to the 1\/4-inch width-across-flats hex body. Always de-energize and discharge any capacitors in the circuit board assembly before handling or mounting hardware. Do not overtighten, as 4-40 threads in lightweight PCB materials can strip under excessive torque. Follow applicable assembly drawings and IPC standards for board mounting practices where required.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Male\/Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 7\/16 inches (0.4375 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length (Male)\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: 1\/4 inch (0.2500 inches)\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: Steel, Grade 2\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-S-633\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: 1427M12F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51743320146226,"sku":"1427M12F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3697da3022b4ba78b1e18ff1610fba0.jpg?v=1788845581","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1427m12f21-440-hex-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}