{"product_id":"electro-hardware-s817-m10-f21-e-circuit-board-spacer","title":"Electro Hardware S817-M10-F21-E Circuit Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE S817-M10-F21-E is a round, female unthreaded circuit board spacer designed to maintain consistent standoff height between a PCB and a mounting surface. Built from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, this spacer provides corrosion resistance suitable for electronic assemblies in demanding environments. It measures 0.625 inches overall length, with an outside diameter of 0.3125 inches and an inside diameter of 0.116 inches, fitting a No. 4 screw. Electronics assemblers, field technicians, and controls installers use these spacers when mounting control boards in HVAC equipment, electrical enclosures, and industrial panels.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for applications requiring precise board standoff and secure, non-threaded female retention on a No. 4 fastener. Typical use cases include mounting control boards in residential and light commercial HVAC systems, motor control panels, and other electronic assemblies where a fixed, repeatable standoff height is critical. The zinc-plated steel construction handles the vibration and thermal cycling common in mechanical system enclosures. Sold individually, it fits standard board-mounting layouts where a 5\/8-inch standoff height is specified.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale unthreaded design accepts No. 4 screws for secure, non-binding board retention\u003c\/li\u003e\n\u003cli\u003e0.625-inch overall length provides consistent PCB standoff height\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel construction meets ASTM B633 and QQ-S-633 Type 1 standards\u003c\/li\u003e\n\u003cli\u003eZinc-plated finish resists corrosion in enclosure and panel environments\u003c\/li\u003e\n\u003cli\u003eRound body shape with 0.3125-inch OD fits standard board-mounting footprints\u003c\/li\u003e\n\u003cli\u003eInside diameter tolerance of 0.000 to 0.010 inches ensures reliable screw fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard No. 4 screw round circuit board spacer for use in PCB mounting applications requiring a 5\/8-inch standoff in inch-measurement assemblies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians and controls assemblers. Always power down and de-energize the control panel or equipment before handling circuit boards or mounting hardware. Use appropriately sized No. 4 fasteners and verify that the spacer seating surface is clean and flat to avoid board stress. Follow applicable NEC guidelines when working inside electrical enclosures.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 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. 4\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\u003eOutside Diameter\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 0.116 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: S817-M10-F21-E\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51739790410034,"sku":"S817-M10-F21-E","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b7f3ef12822ad3eca3d971514c8b2041.jpg?v=1788818895","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s817-m10-f21-e-circuit-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}