{"product_id":"electro-hardware-s593-m10-f21-h-round-circuit-board-spacer","title":"Electro Hardware S593-M10-F21-H Round Circuit Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE S593-M10-F21-H is a round, female unthreaded circuit board spacer designed to maintain precise standoff distances between a printed circuit board and a mounting surface. Machined from Grade 2 steel with a zinc-plated finish meeting ASTM B633 and QQ-S-633 Type 1 specifications, this spacer provides corrosion resistance in light-duty electronic assemblies. It accepts a No. 8 screw, measures 1.5 inches in overall length, and features an inside diameter of 0.171 inches with a length tolerance of -0.005 to 0.005 inches. Electronics assembly technicians and control board service technicians typically use these spacers during PCB mounting and replacement work.\u003c\/p\u003e\n\u003cp\u003eThis spacer is suited for residential and commercial electronic control assemblies where a round steel standoff is required to separate and secure circuit boards from chassis or enclosure surfaces. Common applications include HVAC control board installations, electrical panel sub-assemblies, and industrial electronic enclosures where No. 8 fasteners are the standard mounting hardware. The female unthreaded body allows a screw to pass through or seat against the spacer without thread engagement at the spacer itself.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFemale unthreaded round body accepts No. 8 screw for secure PCB standoff mounting\u003c\/li\u003e\n  \u003cli\u003eGrade 2 steel construction with zinc-plated finish per ASTM B633 and QQ-S-633 Type 1\u003c\/li\u003e\n  \u003cli\u003eOverall length of 1.5 inches with a tight length tolerance of -0.005 to 0.005 inches\u003c\/li\u003e\n  \u003cli\u003eInside diameter of 0.171 inches with a tolerance of 0.000 to 0.010 inches\u003c\/li\u003e\n  \u003cli\u003eOutside diameter of 0.25 inches for compact board-to-board or board-to-chassis spacing\u003c\/li\u003e\n  \u003cli\u003eInch measurement system; sold individually with a minimum order quantity of 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard-dimension replacement or new-installation spacer for electronic assemblies requiring a No. 8 screw, round, female unthreaded steel standoff with a 1.5-inch overall length and 0.25-inch outside diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by electronics assembly technicians or control board service personnel. Power down and de-energize all equipment before removing or installing circuit board hardware. Use appropriately sized drivers and avoid overtightening fasteners through the unthreaded bore, as the spacer is not designed to carry thread load. Follow applicable equipment manufacturer guidelines and NEC requirements when servicing electrical enclosures.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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. 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: 1.5 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\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\u003eOutside Diameter\u003c\/strong\u003e: 0.25 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  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: S593-M10-F21-H\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51739717337394,"sku":"S593-M10-F21-H","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64ed36ec3a1c33caaf172ec4e8fe95b6_10c32b05-dd94-43dc-8e6c-5d4bb96c9be1.jpg?v=1788818172","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s593-m10-f21-h-round-circuit-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}