{"product_id":"electro-hardware-p513m12f21-440-hex-standoff-4-40","title":"Electro Hardware P513M12F21-440 Hex Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE P513M12F21-440 is a female hex circuit board standoff designed to create fixed spacing between printed circuit boards and mounting surfaces. Threaded 4-40 internally, this standoff accepts a mating machine screw to secure stacked PCB assemblies or mount a single board at a set height. The hex body measures 0.25 inches across flats and 0.25 inches in overall length, making it suitable for compact, low-profile board mounting applications. Manufactured from Grade 2 steel with a zinc-plated clear chromate finish per ASTM B633 Type 1 and QQ-S-633, it provides corrosion resistance appropriate for indoor electronic enclosures. Electronics assembly technicians, panel builders, and electricians working on control board installations are the typical end users.\u003c\/p\u003e\u003cp\u003eThis standoff is used in residential and commercial electronic assemblies where PCBs must be mounted at a defined standoff height above a chassis or secondary board. Typical applications include HVAC control panels, electrical enclosures, and OEM electronic equipment. The 4-40 thread size is one of the most common in light-duty PCB hardware, making this part a standard choice wherever fine-thread inch-series standoffs are called for in board stack-up assemblies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale 4-40 internal thread accepts standard 4-40 machine screws for secure board mounting\u003c\/li\u003e\n\u003cli\u003eHex body shape at 0.25 inches across flats allows tightening with standard hex drivers or nut drivers\u003c\/li\u003e\n\u003cli\u003e0.25 inches overall length provides low-profile standoff height for compact PCB assemblies\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel construction with zinc-plated clear chromate finish meets ASTM B633 Type 1 and QQ-S-633 standards\u003c\/li\u003e\n\u003cli\u003eLength tolerance of -0.005 to +0.005 inches ensures consistent stack height across multi-board assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard inch-series female hex standoff for PCB mounting applications using 4-40 thread fasteners in electronic enclosures and control panel assemblies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by electronics assembly technicians or electricians during control panel build or board replacement. Power down and de-energize any enclosure before installing or removing standoffs from live assemblies. Use a correctly sized hex driver or nut driver matching the 0.25-inch across-flats dimension to avoid rounding the hex body. Do not overtighten mating screws, as the fine 4-40 thread in steel can be damaged by excessive torque applied with power tools.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: 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: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.25 inches\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated Clear Chromate\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\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: P513M12F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51742815650098,"sku":"P513M12F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/69be0ea513ec4cbce20afd5016302ef1_e8c103a0-cad6-4f65-8b85-caca68495090.jpg?v=1788839568","url":"https:\/\/voomisupply.com\/products\/electro-hardware-p513m12f21-440-hex-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}