{"product_id":"electro-hardware-s577-m10-f21-e-circuit-board-spacer","title":"Electro Hardware S577-M10-F21-E Circuit Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE S577-M10-F21-E is a round, female unthreaded circuit board spacer designed to maintain precise standoff distances between printed circuit boards and mounting surfaces or between stacked boards. Manufactured from Grade 2 steel with a zinc-plated finish conforming to ASTM B633 and QQ-S-633 Type 1, it delivers reliable corrosion resistance in electronics enclosure environments. The spacer measures 1.25 inches overall length, with a 0.116 inches inside diameter and a 0.25 inches outside diameter. It is sized for No. 4 screw installations. Licensed electricians, control board technicians, and electronics assembly professionals use this hardware during control panel builds, PCB mounting, and board replacement service work.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for residential and commercial electronic control assemblies, HVAC control boards, and general PCB mounting applications where a standardized steel standoff is required. Its female unthreaded body accepts a No. 4 screw and is specified under inch-measurement standards. The zinc-plated steel construction makes it appropriate for indoor enclosures and panel environments where light corrosion resistance is needed. It ships individually and can be ordered in single-unit quantities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale unthreaded body sized for No. 4 screws\u003c\/li\u003e\n\u003cli\u003e1.25 inches overall length with tight length tolerance of -0.005 to 0.005 inches\u003c\/li\u003e\n\u003cli\u003e0.116 inches inside diameter with tolerance of 0.000 to 0.010 inches\u003c\/li\u003e\n\u003cli\u003e0.25 inches outside diameter, round body profile\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\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard-dimension replacement or new-installation circuit board spacer for No. 4 screw PCB mounting applications following inch-measurement specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified electronics technicians or licensed electricians during control board mounting or replacement. De-energize all circuits and discharge any capacitors before handling circuit boards or installing standoff hardware. Use the correct No. 4 screw and verify board hole alignment before seating. Follow applicable NEC guidelines for control panel assembly and enclosure work.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Female Unthreaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: No. 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.25 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: 0.116 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\u003eOutside Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\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 Standards\u003c\/strong\u003e: ASTM B633, QQ-S-633 Type 1\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: S577-M10-F21-E\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51743003083058,"sku":"S577-M10-F21-E","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64ed36ec3a1c33caaf172ec4e8fe95b6_6092d69e-8197-40a8-b55d-40d7afde0122.jpg?v=1788841448","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s577-m10-f21-e-circuit-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}