{"product_id":"electro-hardware-p545m10f21-440-female-standoff-4-40","title":"Electro Hardware P545M10F21-440 Female Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE P545M10F21-440 is a round female standoff designed to create a threaded space between two mating components in electrical enclosures, control panels, and electronic assemblies. The standoff features a 4-40 thread size, a 0.75 inch overall length, and a 0.25 inch outside diameter. The body is fully threaded and manufactured from Grade 2 steel with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-S-633 standards. Licensed electricians, panel builders, and electronics technicians install these standoffs when mounting circuit boards, sub-panels, or barrier strips where defined clearance between surfaces is required.\u003c\/p\u003e\u003cp\u003eThis standoff is suited for use in residential and commercial electrical control panels, industrial enclosures, and electronic equipment assemblies. The female thread configuration accepts a mating male fastener on both ends, making it practical for stacking or spacing printed circuit boards, mounting brackets, and other flat components that require a fixed air gap or insulation clearance. The small 4-40 thread size is standard in light-duty electronics and instrumentation work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 thread size for compatibility with standard light-duty electronic and instrumentation fasteners\u003c\/li\u003e\n\u003cli\u003e0.75 inch overall length with a 1 inch thread depth, allowing full engagement of mating screws\u003c\/li\u003e\n\u003cli\u003e0.25 inch outside diameter round body for compact panel layouts\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel construction for reliable strength in fixed mounting applications\u003c\/li\u003e\n\u003cli\u003eZinc-plated finish per ASTM B633 Type 1 and QQ-S-633 for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eFully threaded body provides consistent thread engagement along the entire length\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation standoff for control panels and electronic assemblies requiring a 4-40 female threaded spacer with a 0.75 inch overall length and 0.25 inch outside diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electricians or electronics technicians using standard hand tools. De-energize all circuits in the enclosure before installing or removing standoffs in live panels. Thread engagement should be verified to avoid cross-threading, which can compromise clamping force and board stability. Follow applicable NEC requirements for panel assembly and component mounting clearances.\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: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Depth\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\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\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\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: P545M10F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51740136341810,"sku":"P545M10F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/24a5d05114a707e7b06a2620b31fbd67_3ab8648c-f8e1-4e97-a7c2-f365d1634b82.jpg?v=1788822742","url":"https:\/\/voomisupply.com\/products\/electro-hardware-p545m10f21-440-female-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}