{"product_id":"electro-hardware-s289m10f21c-circuit-board-spacer-steel","title":"Electro Hardware S289M10F21C Circuit Board Spacer Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE S289M10F21C is a round, female unthreaded circuit board spacer designed to create a fixed standoff distance between a PCB and a mounting surface. Machined from Grade 2 steel with a zinc-plated finish conforming to ASTM B633 and QQ-S-633 Type 1, this spacer provides corrosion resistance in typical indoor control-board environments. It measures 3\/16 inches overall length (OAL), 3\/16 inches outside diameter (OD), and 0.089 inches inside diameter (ID), sized for a No. 2 screw. Electricians, HVAC technicians, and electronics assembly techs use this type of hardware when mounting control boards inside equipment enclosures.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for residential and light commercial applications wherever a No. 2 screw pattern circuit board mount is required. Typical install scenarios include PCB standoff mounting inside HVAC control panels, electrical enclosures, and other equipment requiring precise board-to-chassis clearance. Its compact 3\/16-inch profile makes it appropriate for low-profile board assemblies where space is constrained.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale unthreaded round body accepts No. 2 screw for secure two-point board mounting\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel construction for reliable mechanical support in enclosure environments\u003c\/li\u003e\n\u003cli\u003eZinc-plated finish meets ASTM B633 and QQ-S-633 Type 1 for corrosion resistance\u003c\/li\u003e\n\u003cli\u003e3\/16 inches OAL provides consistent standoff height between PCB and mounting surface\u003c\/li\u003e\n\u003cli\u003eInside diameter tolerance of 0.000 to 0.010 inches and length tolerance of -0.005 to 0.005 inches for consistent fitment\u003c\/li\u003e\n\u003cli\u003eInch measurement system; UNSPSC Code 31161816\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or general-use standoff spacer for circuit board assemblies requiring a No. 2 screw, female unthreaded, round spacer with a 3\/16-inch OAL and OD in inch-measurement applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified electronics assembly technicians or licensed trades during control board service or panel assembly. Always de-energize and lock out the equipment before accessing any circuit board or internal enclosure hardware. Use the correct No. 2 screw driver or driver bit to avoid stripping the mating fastener. Do not overtighten the screw into the unthreaded female bore, as this spacer relies on the fastener for clamping force only.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel, Grade 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASTM B633, QQ-S-633 Type 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: No. 2\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 (OAL)\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter (OD)\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter (ID)\u003c\/strong\u003e: 0.089 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\u003eLength Tolerance\u003c\/strong\u003e: -0.005 to 0.005 inches\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: S289M10F21C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51728527556914,"sku":"S289M10F21C","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64ed36ec3a1c33caaf172ec4e8fe95b6_554de477-0cdd-4b15-be4e-624a9245979a.jpg?v=1788692751","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s289m10f21c-circuit-board-spacer-steel","provider":"Voomi Supply","version":"1.0","type":"link"}