{"product_id":"electro-hardware-1310m12f21440-hex-standoff-4-40","title":"Electro Hardware 1310M12F21440 Hex Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE 1310M12F21440 is a male-female hex circuit board standoff designed to space and secure printed circuit boards within electronic enclosures and control assemblies. The standoff features a 4-40 unified thread on both ends — a male thread on one side and a female threaded bore on the other — allowing boards to be stacked or mounted at a fixed distance from a chassis. The body measures 0.4063 inches in overall length with a 3\/16-inch hex width across flats, making it compatible with standard hex drivers and nut drivers. Constructed from steel with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-S-633 standards, this standoff delivers corrosion resistance appropriate for indoor control panels and circuit board assemblies.\u003c\/p\u003e\n\u003cp\u003eThis standoff is used in residential and commercial electrical and HVAC control board assemblies where boards must be elevated from a mounting surface or stacked in a multi-board configuration. Typical applications include furnace control boards, thermostat sub-assemblies, variable frequency drive panels, and general electronic equipment enclosures. The 4-40 thread size is a widely used standard in PCB mounting hardware, making this standoff a common replacement or build component for electrical and controls technicians working on panel-level assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMale-female hex configuration allows board stacking and chassis-mount in a single fastener\u003c\/li\u003e\n  \u003cli\u003e4-40 unified thread on both ends for compatibility with standard PCB hardware\u003c\/li\u003e\n  \u003cli\u003eOverall body length of 0.4063 inches with 3\/16-inch hex width across flats\u003c\/li\u003e\n  \u003cli\u003eSteel construction with zinc-plated finish per ASTM B633 Type 1 and QQ-S-633\u003c\/li\u003e\n  \u003cli\u003eThread depth of 1\/4 inch on the female end; thread length of 3\/16 inch on the male end\u003c\/li\u003e\n  \u003cli\u003eLength tolerance of -0.005 to 0.005 inches for precise board spacing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 4-40 male-female hex PCB standoff for use in circuit board mounting applications requiring inch-system hardware and zinc-plated steel fasteners.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by electricians or controls technicians during panel assembly or board replacement. Power down and de-energize the control panel fully before handling circuit boards or standoff hardware. Use a properly sized hex driver or nut driver matching the 3\/16-inch across-flats dimension to avoid rounding the hex body. Follow applicable NEC guidelines and equipment manufacturer torque recommendations when securing board assemblies within enclosures.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Male and 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: 0.4063 inches (13\/32 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.1875 inches (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\u003eThread Length (Male)\u003c\/strong\u003e: 3\/16 inch\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\u003eBody Shape\u003c\/strong\u003e: Hex\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\u003eWeight\u003c\/strong\u003e: 0.13 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161816\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: 1310M12F21440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51738279313714,"sku":"1310M12F21440","price":18.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e2ed038b6de2684c05119d308ef78b1d_0751fe8f-a738-4e88-964e-7f49e5de93d9.jpg?v=1788797594","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1310m12f21440-hex-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}