{"product_id":"electro-hardware-1443m12f21-440-hex-standoff-4-40","title":"Electro Hardware 1443M12F21-440 Hex Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE 1443M12F21-440 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs or between a board and a chassis panel. The standoff has a 4-40 threaded male end on one side and a 4-40 threaded female end on the other, allowing boards to be stacked or mounted in sequence. The overall length is 15\/16 inches (0.9375 inches), with a hex body that measures 1\/4 inch across the flats. Constructed from Grade 2 steel with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-S-633 standards, it delivers corrosion resistance suitable for indoor electronic assemblies. Electronics technicians and electrical contractors install this type of standoff during control board assembly, panel fabrication, and enclosure builds.\u003c\/p\u003e\u003cp\u003eThis standoff is used in residential and commercial electronic control panels, HVAC control boards, electrical enclosures, and general PCB mounting applications where a male-female threaded connection is required. The hex body allows engagement with a standard nut driver or hex wrench for secure tightening without slipping. The 3\/16-inch thread length on the male end and 1\/4-inch thread depth on the female end accommodate standard 4-40 fasteners used across most PCB mounting configurations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMale-female hex standoff provides rigid, stackable PCB spacing\u003c\/li\u003e\n\u003cli\u003e4-40 thread size on both ends for standard circuit board fastener compatibility\u003c\/li\u003e\n\u003cli\u003eHex body shape at 1\/4 inch across flats allows nut driver or wrench installation\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel construction with zinc-plated finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eMeets ASTM B633 Type 1 and QQ-S-633 finish standards\u003c\/li\u003e\n\u003cli\u003eSold individually, suitable for exact-quantity procurement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-build fastener for circuit board assemblies using 4-40 threaded hardware in standard PCB standoff applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians, electricians, or qualified service personnel working on control boards and panel assemblies. De-energize and lock out all electrical power before servicing any circuit board or panel. Use a nut driver or appropriately sized hex wrench sized for 1\/4-inch across flats to seat the standoff without over-torquing the threaded body. Follow applicable NEC guidelines when installing control boards inside electrical enclosures.\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: 15\/16 inches (0.9375 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 3\/4 inches (0.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length (Male End)\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Depth (Female End)\u003c\/strong\u003e: 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 1\/4 inches (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\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: 1443M12F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51742043013426,"sku":"1443M12F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/81116f15193318fc01d8a784fac20c15.jpg?v=1788835108","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1443m12f21-440-hex-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}