{"product_id":"electro-hardware-p421m09f16440-hex-standoff-4-40-2-1-4in","title":"Electro Hardware P421M09F16440 Hex Standoff 4-40 2-1\/4in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE P421M09F16440 is a female hex circuit board standoff designed to create fixed spacing between a PCB and a mounting surface or between stacked boards. Threaded 4-40 on the female end with a 1\/4 inch thread depth, it accepts a mating screw to secure the board firmly in place. The hex body measures 3\/16 inches across flats, allowing a standard hex driver or wrench to install and torque it without slipping. Machined from 303 stainless steel with a plain bright finish, this standoff meets QQ-S-763 fastener standards and resists corrosion in demanding environments. Electronics assemblers, panel builders, and HVAC control board technicians are the typical installers.\u003c\/p\u003e\u003cp\u003eThis standoff is used wherever a circuit board must be mounted at a fixed height above a chassis or enclosure floor, including residential and commercial HVAC control panels, industrial equipment enclosures, and electronic assembly applications. The 2-1\/4 inch overall length provides ample clearance for components mounted on the underside of the board or for routing wire harnesses between the board and the panel surface. The inch measurement system and 4-40 thread size make it a standard fit for North American PCB assembly work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale 4-40 thread with 1\/4 inch thread depth for secure board fastening\u003c\/li\u003e\n\u003cli\u003e2-1\/4 inch overall length provides generous standoff clearance\u003c\/li\u003e\n\u003cli\u003eHex body at 3\/16 inches across flats for wrench-assisted installation\u003c\/li\u003e\n\u003cli\u003e303 stainless steel construction meets QQ-S-763 fastener standard\u003c\/li\u003e\n\u003cli\u003ePlain bright finish with no coating that could affect dimensional tolerances\u003c\/li\u003e\n\u003cli\u003eLength tolerance held to plus or minus 0.005 inches for precise stacking\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation standoff for circuit boards using 4-40 screw fastening systems in inch-measurement assemblies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians or HVAC controls specialists. De-energize all equipment and discharge any capacitors before handling circuit boards. Use a hex driver or open-end wrench sized for 3\/16 inch across flats to seat the standoff firmly without overtightening, which can crack PCB laminate. Follow the equipment manufacturer's assembly documentation for board mounting sequence and screw engagement depth.\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: 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.25 inches (2-1\/4 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.1875 inches (3\/16 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: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 303\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-S-763\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: P421M09F16440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51745472446770,"sku":"P421M09F16440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/69be0ea513ec4cbce20afd5016302ef1_e28a84d1-d634-40c5-a326-cee645d55bcb.jpg?v=1788864164","url":"https:\/\/voomisupply.com\/products\/electro-hardware-p421m09f16440-hex-standoff-4-40-2-1-4in","provider":"Voomi Supply","version":"1.0","type":"link"}