{"product_id":"electro-hardware-1308m12f21440-hex-standoff-4-40","title":"Electro Hardware 1308M12F21440 Hex Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE 1308M12F21440 is a male-female hex circuit board standoff designed to create fixed spacing between PCBs, chassis, and mounting surfaces in electronic assemblies. It features a 4-40 unified coarse thread with a male thread on one end and a female threaded bore on the other, allowing boards to be stacked or secured in a single pass. The hex body measures 3\/16 inches across flats and has an overall body length of 11\/32 inches (0.3438 inches). Finished in zinc plating to ASTM B633 Type 1 and QQ-S-633 standards, it provides corrosion resistance suitable for indoor electronic enclosures. Installation is performed by electronics technicians, HVAC controls specialists, and panel builders working with control boards and low-voltage assemblies.\u003c\/p\u003e\u003cp\u003eThis standoff is used in residential and commercial applications wherever PCBs require mechanical separation and secure mounting. Typical installations include HVAC control boards, electrical panel assemblies, industrial enclosures, and custom electronics chassis builds. The male-female configuration allows standoffs to be threaded together in series for increased stack height or used as a single spacer between a board and a metal or plastic mounting surface. Length tolerance is held to plus or minus 0.005 inches for consistent, repeatable board clearance.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 unified coarse thread with male end and female threaded bore for stackable PCB mounting\u003c\/li\u003e\n\u003cli\u003eHex body shape, 3\/16 inches across flats, for wrench or nut driver installation\u003c\/li\u003e\n\u003cli\u003eOverall body length of 11\/32 inches (0.3438 inches) with 1\/4 inch thread depth\u003c\/li\u003e\n\u003cli\u003eSteel construction with zinc plating meeting ASTM B633 Type 1 and QQ-S-633 standards\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus or minus 0.005 inches for precision board spacing\u003c\/li\u003e\n\u003cli\u003eInch measurement system, Material Grade 2 steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-build fastener for any application requiring a 4-40 threaded male-female hex standoff with a 3\/16 inch hex body in steel with zinc finish.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by electronics technicians or controls specialists using a nut driver or small wrench sized to the 3\/16 inch hex body. Power down and de-energize all circuits before working on or near any control board assembly. Avoid over-torquing the standoff into threaded inserts or PCB mounting holes, as excess torque can crack board substrates or strip 4-40 threads. Follow applicable assembly drawings and any relevant IPC standards for PCB hardware installation.\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 and Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Body Length\u003c\/strong\u003e: 11\/32 inches (0.3438 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\u003eLength Tolerance\u003c\/strong\u003e: plus or minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel, Material Grade 2\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-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\u003eWeight\u003c\/strong\u003e: 0.12 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161816\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: 1308M12F21440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51733492007218,"sku":"1308M12F21440","price":29.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e2ed038b6de2684c05119d308ef78b1d_894c156c-103c-4270-b6eb-ac3f87fe5b34.jpg?v=1788755851","url":"https:\/\/voomisupply.com\/products\/electro-hardware-1308m12f21440-hex-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}