{"product_id":"electro-hardware-1451m03f21-440-hex-board-standoff-4-40","title":"Electro Hardware 1451M03F21-440 Hex Board Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE 1451M03F21-440 is a male-female hex circuit board standoff designed to create fixed spacing between printed circuit boards and mounting surfaces or between stacked boards. The hex body provides a secure grip for installation with standard hex drivers or wrenches. Machined from brass with a zinc-plated finish that meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, this standoff delivers corrosion resistance suitable for electronics enclosures and panel assemblies. The overall length is 1.1875 inches with a 1\/4 inch width across flats, a 1 inch body length, and a 3\/16 inch thread length on the male end. Thread size is 4-40.\u003c\/p\u003e\u003cp\u003eThis standoff is used in electronics assembly, control panel fabrication, and PCB mounting applications across residential and commercial HVAC controls, electrical enclosures, and industrial equipment. The male-female configuration allows standoffs to be stacked or used as a single spacer between a board and a chassis. Electronics technicians, panel builders, and field service techs working on control board installations will encounter this hardware in both OEM repair and custom assembly scenarios.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 male-female thread configuration for stacking or single-tier PCB mounting\u003c\/li\u003e\n\u003cli\u003eHex body shape allows torque application with standard hex tools without slipping\u003c\/li\u003e\n\u003cli\u003eBrass construction with zinc-plated finish meets ASTM B633 Type 1 and QQ-B-626 Comp 22\u003c\/li\u003e\n\u003cli\u003eOverall length of 1.1875 inches with a 1 inch hex body and 3\/16 inch male thread length\u003c\/li\u003e\n\u003cli\u003e1\/4 inch width across flats compatible with common hex drivers and nut drivers\u003c\/li\u003e\n\u003cli\u003eThread depth of 1\/4 inch on the female end provides secure board engagement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in 4-40 threaded PCB mounting applications where a hex male-female standoff is required. Suitable for circuit board assemblies using standard inch-series 4-40 hardware.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians, panel builders, or HVAC control board service technicians. Always de-energize the equipment and discharge any capacitors before working inside electrical enclosures or on control boards. Use a correctly sized hex driver or nut driver matching the 1\/4 inch across-flats dimension to avoid rounding the hex body. Do not overtighten — brass fasteners are softer than steel and can strip at the thread under excessive torque.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Male\/Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length (Male)\u003c\/strong\u003e: 3\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Depth (Female)\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 1\/4 inch (0.2500 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\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-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: 1451M03F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51755210866994,"sku":"1451M03F21-440","price":16.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/354e84e78593c87d91054c55b2ccfd1d_0f72eaa3-c661-46ed-aac6-7161b3d89561.jpg?v=1788952234","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1451m03f21-440-hex-board-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}