{"product_id":"electro-hardware-s857-mo4-f16-g-round-pcb-spacer-6-aluminum","title":"Electro Hardware S857-MO4-F16-G Round Pcb Spacer 6 Aluminum","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE S857-MO4-F16-G is a round, female unthreaded circuit board spacer designed to create precise standoff distances between a PCB and a mounting surface or between stacked boards. Machined from aluminum alloy grade T-3 per fastener standard QQ-A-225A Comp 2, it offers a lightweight and corrosion-resistant construction without any surface coating. It accepts a number 6 screw, measures 1.25 inches overall length, carries a 0.141 inch inside diameter, and has a 0.3125 inch outside diameter. Electronics technicians, panel builders, and control board installers use these spacers to secure and isolate circuit boards in HVAC controls, electrical enclosures, and industrial panels.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for residential and commercial applications wherever a number 6 fastener is used to mount a circuit board. Common install scenarios include securing HVAC control boards inside furnace or air handler cabinets, mounting relay or transformer boards in electrical panels, and supporting PCBs in custom control enclosures. The uncoated aluminum finish is appropriate for indoor, dry environments and clean equipment interiors where dielectric isolation is not a primary concern.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale unthreaded bore accepts number 6 screws for straightforward board mounting\u003c\/li\u003e\n\u003cli\u003eAluminum grade T-3 per QQ-A-225A Comp 2 for lightweight, corrosion-resistant performance\u003c\/li\u003e\n\u003cli\u003e1.25 inch overall length provides consistent standoff height across a board assembly\u003c\/li\u003e\n\u003cli\u003e0.141 inch inside diameter with a tolerance of 0.000 to 0.010 inches for reliable fastener fit\u003c\/li\u003e\n\u003cli\u003e0.3125 inch outside diameter with length tolerance of -0.005 to 0.005 inches for precise fit\u003c\/li\u003e\n\u003cli\u003eUncoated finish  -  no coatings to interfere with thermal or mechanical contact\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard round PCB spacer for use with number 6 screws in circuit board mounting applications across HVAC, electrical, and industrial control assemblies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003ePower down and de-energize all circuits before removing or installing circuit board hardware. Use a calibrated torque screwdriver to avoid over-tightening through the unthreaded bore, which can crack the PCB substrate. Follow applicable NEC guidelines when installing control boards inside electrical enclosures. Inspect the mounting surface for burrs or debris before seating the spacer to ensure flush, level board support.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: T-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: QQ-A-225A Comp 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: Number 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Female Unthreaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter Tolerance\u003c\/strong\u003e: 0.000 to 0.010 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 0.3125 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\u003eFinish\u003c\/strong\u003e: Uncoated\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: S857-MO4-F16-G\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51739755708722,"sku":"S857-MO4-F16-G","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64ed36ec3a1c33caaf172ec4e8fe95b6_cb045370-a840-469c-bb48-9f0c8b07ebd2.jpg?v=1788818541","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s857-mo4-f16-g-round-pcb-spacer-6-aluminum","provider":"Voomi Supply","version":"1.0","type":"link"}