{"product_id":"electro-hardware-1431m03f21-440-hex-standoff-4-40-9-16-in","title":"Electro Hardware 1431M03F21-440 Hex Standoff 4-40 9\/16 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE 1431M03F21-440 is a male-female hex circuit board standoff designed to create precise spacing between PCBs, panels, and chassis in electronics assemblies. Threaded 4-40 on both ends, this standoff accepts a machine screw on the male end and receives a mating screw on the female end, allowing boards to stack securely at a fixed height. The body is machined from brass and finished with a zinc plating that meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards. Overall length is 9\/16 inch (0.5625 inches), with a 1\/4-inch hex body width across flats for easy wrench engagement during installation.\u003c\/p\u003e\u003cp\u003eThis standoff is used in residential and commercial electronics applications wherever circuit boards must be mounted at a controlled standoff height from a base surface or stacked in multi-board assemblies. Typical install scenarios include control board mounting in HVAC equipment, electrical enclosures, instrumentation panels, and industrial electronics. The inch-measurement system and 4-40 thread size are standard in North American electronic and electromechanical assemblies. Electricians, electronics technicians, and OEM assembly crews regularly specify this hardware for control board service and new builds.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMale-female thread configuration allows board stacking and secure fastening in a single standoff\u003c\/li\u003e\n\u003cli\u003e4-40 thread size is a widely used standard in North American PCB and control board assemblies\u003c\/li\u003e\n\u003cli\u003eHex body shape allows wrench-driven installation without slipping\u003c\/li\u003e\n\u003cli\u003eBrass construction with zinc plating resists corrosion and meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards\u003c\/li\u003e\n\u003cli\u003eTight length tolerance of plus or minus 0.005 inches ensures consistent board spacing in precision assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or service standoff for circuit board assemblies using 4-40 inch-series threaded hardware, including control boards in HVAC equipment, electrical enclosures, and industrial panel assemblies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by electricians, electronics technicians, or HVAC service technicians working on control board assemblies. De-energize all equipment and discharge any stored electrical energy before handling circuit boards or fasteners. A nut driver or small hex wrench sized for 1\/4-inch across flats is recommended to seat the standoff without over-torquing the brass body. Follow applicable NEC guidelines and equipment manufacturer instructions when replacing control board hardware in 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: 0.5625 inches (9\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.375 inches (3\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Depth\u003c\/strong\u003e: 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.25 inches (1\/4 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: Brass\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-B-626 Comp 22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 1431M03F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51752564654386,"sku":"1431M03F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f0e18eacf727e166037f511f031c0301.jpg?v=1788929125","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1431m03f21-440-hex-standoff-4-40-9-16-in","provider":"Voomi Supply","version":"1.0","type":"link"}