{"product_id":"electro-hardware-p421m06f16440-hex-standoff-4-40","title":"Electro Hardware P421M06F16440 Hex Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE P421M06F16440 is a female hex circuit board standoff machined from aluminum alloy and designed to create precise, rigid spacing between PCB layers or between a board and a chassis. This standoff accepts a 4-40 threaded fastener on both the mounting end and the interior female thread, with a 1\/4-inch thread depth. The overall length is 2-1\/4 inches and the hex body measures 3\/16 inches across flats, giving technicians a reliable wrench grip during installation. The plain, bright uncoated finish meets QQ-A-225A Comp 2 material standards. Licensed electricians, electronics technicians, and control-board service professionals install these fasteners in panel assembly and board-mounting applications.\u003c\/p\u003e\u003cp\u003eThis standoff is suited for residential and commercial electronic enclosure assemblies, control panel builds, and circuit board stacking arrangements where consistent board separation and secure mechanical attachment are required. The 4-40 thread size is a common pitch in light-duty PCB mounting applications across HVAC control boards, electrical panels, and industrial electronics. The aluminum construction keeps weight low while providing adequate rigidity for most indoor panel environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale hex body with 4-40 internal thread and 1\/4-inch thread depth for secure fastener engagement\u003c\/li\u003e\n\u003cli\u003eOverall length of 2-1\/4 inches provides reliable PCB standoff spacing\u003c\/li\u003e\n\u003cli\u003e3\/16-inch hex width across flats allows standard nut driver or hex wrench installation\u003c\/li\u003e\n\u003cli\u003eAluminum construction per material grade T3 keeps weight minimal without sacrificing structural integrity\u003c\/li\u003e\n\u003cli\u003ePlain bright uncoated finish meets QQ-A-225A Comp 2 specification\u003c\/li\u003e\n\u003cli\u003eLength tolerance of -0.005 to +0.005 inches supports consistent board alignment across multi-standoff layouts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard 4-40 female hex aluminum standoff for use in circuit board mounting, panel assembly, and PCB stacking applications requiring a 2-1\/4-inch OAL spacer.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians or licensed electricians during panel assembly or control board service. De-energize all circuits and discharge any capacitive components before working inside an enclosure. Use a correctly sized nut driver or hex wrench matched to the 3\/16-inch flats to avoid stripping the aluminum hex body. Do not over-torque; aluminum threads are susceptible to galling and cross-threading if fasteners are driven with excessive force.\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\u003eThread Depth\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.1875 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: Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: T3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Plain (Bright\/Uncoated)\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\u003eStandard\u003c\/strong\u003e: QQ-A-225A Comp 2\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: 1 pound\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: P421M06F16440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51737222250802,"sku":"P421M06F16440","price":57.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2631d8f90ba0d9d2a96df52c14a90332.jpg?v=1788785760","url":"https:\/\/voomisupply.com\/products\/electro-hardware-p421m06f16440-hex-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}