{"product_id":"electro-hardware-p529m03f21-440-female-hex-standoff-4-40","title":"Electro Hardware P529M03F21-440 Female Hex Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE P529M03F21-440 is a female hex circuit board standoff designed to mount and space printed circuit boards within enclosures and electronic assemblies. The standoff features a 4-40 female threaded bore, a 0.5 inch overall length, and a 0.25 inch width across the hex flats. Manufactured from brass with a zinc-plated finish certified to ASTM B633 Type 1 and QQ-B-626 Comp 22, this standoff provides corrosion resistance and reliable electrical isolation between stacked boards. It is installed by electronics technicians, field service engineers, and industrial maintenance professionals working on control panels and PCB assemblies.\u003c\/p\u003e\u003cp\u003eThis standoff is suited for residential and commercial control board assemblies, industrial automation enclosures, and any application requiring precise PCB-to-surface or PCB-to-PCB spacing using 4-40 threaded hardware. The hex body shape allows installation and removal with standard hex drivers or nut drivers, making it practical in tight-tolerance layouts where boards must be securely mounted without direct contact with chassis surfaces. The zinc-plated brass construction is appropriate for indoor and protected environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 female threaded bore for standard inch-series 4-40 fasteners\u003c\/li\u003e\n\u003cli\u003e0.5 inch overall length with a tight length tolerance of -0.005 to +0.005 inches\u003c\/li\u003e\n\u003cli\u003eHex body profile, 0.25 inch width across flats, compatible with standard nut drivers\u003c\/li\u003e\n\u003cli\u003eBrass base material with zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22\u003c\/li\u003e\n\u003cli\u003eInch measurement system  -  fits standard imperial PCB mounting layouts\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 board assemblies using 4-40 inch-series threaded fasteners in industrial, commercial, and residential control panel applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians or qualified control panel assemblers. Power down and de-energize all circuits before handling PCBs or standoffs in live enclosures. Use a correctly sized nut driver or hex driver matching the 0.25 inch across-flats dimension to avoid rounding the hex body. Do not over-torque  -  brass standoffs are susceptible to thread damage if excessive force is applied.\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\u003eOverall Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.25 inches\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: 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\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: P529M03F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51743856460082,"sku":"P529M03F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/59e594cf171389ace4104f7657c27e94.jpg?v=1788850445","url":"https:\/\/voomisupply.com\/products\/electro-hardware-p529m03f21-440-female-hex-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}