{"product_id":"electro-hardware-1307m03f21440-hex-standoff-4-40-brass","title":"Electro Hardware 1307M03F21440 Hex Standoff 4-40 Brass","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE 1307M03F21440 is a male-female hex circuit board standoff used to create precise spacing between PCBs, chassis panels, and mounting surfaces in electronic assemblies. Threaded 4-40 on both ends — male on one side, female on the other — this standoff provides a secure stacking point for circuit board layers or panel-mount hardware. The hex body measures 3\/16 inch across flats, with an overall body length of 5\/16 inch (0.3125 inch) and a thread depth of 1\/4 inch. Constructed from brass with a zinc-plated finish meeting ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, it delivers corrosion resistance suitable for indoor electronic enclosures and control panel builds.\u003c\/p\u003e\n\u003cp\u003eThis standoff is used in electronic control board assemblies found across HVAC, electrical, and industrial equipment. Technicians and panel builders install these when stacking PCBs in equipment enclosures, mounting control boards to chassis, or securing daughter boards to a main board at a fixed standoff height. The 4-40 thread is a common size in low-voltage control and instrumentation boards. Suitable for any application requiring a hex hex standoff at this thread size and body length in a brass-zinc construction.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMale-female configuration allows modular board stacking or chassis-to-board mounting in a single fastener\u003c\/li\u003e\n  \u003cli\u003e4-40 thread size on both ends suits standard control board and PCB fastening patterns\u003c\/li\u003e\n  \u003cli\u003eHex body at 3\/16 inch across flats allows standard hex driver installation without slipping\u003c\/li\u003e\n  \u003cli\u003e5\/16 inch overall body length with 1\/4 inch thread depth provides consistent board spacing\u003c\/li\u003e\n  \u003cli\u003eBrass base material with zinc-plated finish meets ASTM B633 Type 1 and QQ-B-626 Comp 22 corrosion standards\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.13 pounds per package, minimizing load on PCB mounting points\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 4-40 male-female hex standoff for use in electronic control board assemblies, PCB stacking applications, and panel-mount installations where a 5\/16 inch standoff height and 3\/16 inch hex body are specified.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by electricians, electronics technicians, or control panel builders. Power down all equipment and discharge any capacitors before handling circuit boards or installing standoffs. A nut driver or hex wrench sized for 3\/16 inch across flats is the appropriate tool; avoid over-tightening on brass threads, as brass is softer than steel and can strip or crack the female thread under excessive torque. Ensure mating board holes align with the standoff pattern before seating to prevent board stress.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eBody Shape\u003c\/strong\u003e: Hex\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Body Length\u003c\/strong\u003e: 5\/16 inch (0.3125 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 3\/16 inch (0.1875 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Depth\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 3\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: -0.005 to +0.005 inch\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\u003eWeight\u003c\/strong\u003e: 0.13 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161816\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 1307M03F21440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51732412203314,"sku":"1307M03F21440","price":31.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e2ed038b6de2684c05119d308ef78b1d_768e9e25-f7a8-43fe-869f-5ccc436e628e.jpg?v=1788742514","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1307m03f21440-hex-standoff-4-40-brass","provider":"Voomi Supply","version":"1.0","type":"link"}