{"product_id":"electro-hardware-s817-m01-f21-h-circuit-board-spacer","title":"Electro Hardware S817-M01-F21-H Circuit Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE S817-M01-F21-H is a round, female unthreaded circuit board spacer designed to create precise standoff spacing between a PCB and a mounting surface or between stacked boards. Machined from brass and finished with a zinc plating that meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer measures 0.625 inches overall length with a 0.3125-inch outside diameter and a 0.171-inch inside diameter to accept a number 8 screw. Licensed electricians, electronics technicians, and control board service professionals install this hardware during panel assembly, board replacement, or enclosure builds where consistent board height and electrical isolation are required.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for residential and commercial control board applications, including HVAC control assemblies, electrical enclosures, and any PCB mounting scenario requiring a standardized number 8 screw clearance hole. The unthreaded female body design allows a screw to pass through freely, making it appropriate for use as a standoff or pass-through spacer in tight board layouts. The brass construction with zinc-plated finish resists corrosion in moderate-humidity environments typical of HVAC equipment cabinets and electrical panels.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBrass construction with zinc-plated finish meeting ASTM B633 and QQ-B-626 Comp 22 Type 1 standards\u003c\/li\u003e\n\u003cli\u003eFemale unthreaded body accepts a number 8 screw for pass-through mounting\u003c\/li\u003e\n\u003cli\u003e0.625-inch overall length with a tight length tolerance of -0.005 to 0.005 inches\u003c\/li\u003e\n\u003cli\u003e0.171-inch inside diameter with tolerance of 0.000 to 0.010 inches for consistent screw fit\u003c\/li\u003e\n\u003cli\u003eRound body profile with 0.3125-inch outside diameter for compact PCB footprint\u003c\/li\u003e\n\u003cli\u003eInch measurement system  -  dimensions align with standard American fastener sizing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard replacement or assembly spacer for circuit board mounting applications requiring a number 8 screw, female unthreaded round brass standoff.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electricians or electronics technicians during board assembly or control board replacement. Always de-energize the equipment and follow lockout\/tagout procedures before working inside any electrical enclosure or HVAC control cabinet. No special tooling beyond standard hand tools is required to position these spacers; secure the mating fastener to the manufacturer-specified torque for the surrounding assembly. Verify screw length accounts for the full 0.625-inch spacer height plus board thickness before final assembly.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\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\u003eFastener Standard\u003c\/strong\u003e: ASTM B633, QQ-B-626 Comp 22 Type 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: No. 8\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: 0.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: -0.005 to 0.005 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\u003eInside Diameter\u003c\/strong\u003e: 0.171 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\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: S817-M01-F21-H\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51740834529586,"sku":"S817-M01-F21-H","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64ed36ec3a1c33caaf172ec4e8fe95b6_7798b779-a224-44bb-abad-7c8aff729dd2.jpg?v=1788827721","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s817-m01-f21-h-circuit-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}