{"product_id":"electro-hardware-s553-m10-f21-g-round-board-spacer","title":"Electro Hardware S553-M10-F21-G Round Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE S553-M10-F21-G is a round, female unthreaded circuit board spacer designed to provide precise, stable standoff clearance between a PCB and a mounting surface. Machined from Grade 2 steel with a zinc-plated finish per ASTM B633 and QQ-S-633 Type 1, this spacer delivers corrosion resistance alongside the mechanical strength expected in industrial and commercial electronic assemblies. It measures 0.875 inches overall length with a 0.25 inch outside diameter and a 0.141 inch inside diameter, sized for No. 6 screw applications. Electronics technicians, panel builders, and industrial maintenance personnel use this type of hardware during control board mounting and enclosure assembly work.\u003c\/p\u003e\n\u003cp\u003eThis spacer is suited for use in control panel assemblies, HVAC circuit board mounting, electrical enclosures, and similar applications where a fixed standoff clearance is required between a PCB and a chassis or sub-panel. The female unthreaded design accepts a No. 6 screw and holds board position securely without threading into the board itself. It is appropriate for both original equipment assembly and field replacement or repair scenarios where consistent board standoff is critical to proper component clearance and airflow.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 2 steel construction with zinc-plated finish meets ASTM B633 and QQ-S-633 Type 1 standards\u003c\/li\u003e\n  \u003cli\u003eFemale unthreaded body accepts No. 6 screws for straightforward board mounting\u003c\/li\u003e\n  \u003cli\u003eOverall length of 0.875 inches provides consistent standoff clearance\u003c\/li\u003e\n  \u003cli\u003eOutside diameter of 0.25 inches and inside diameter of 0.141 inches with tight tolerances (inside diameter tolerance 0.000 to 0.010 inches, length tolerance -0.005 to 0.005 inches)\u003c\/li\u003e\n  \u003cli\u003eRound body shape for uniform load distribution on PCB mounting holes\u003c\/li\u003e\n  \u003cli\u003eZinc plating provides corrosion resistance in enclosure and panel environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation standoff spacer for circuit board mounting applications requiring a No. 6 screw, female unthreaded, round steel spacer with 0.875 inch overall length.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by electronics technicians, panel builders, or licensed electricians during control board assembly or replacement. Power down and de-energize the control panel or enclosure fully before handling any circuit board hardware. Use appropriately sized No. 6 screws and avoid overtightening, which can crack PCB mounting pads or distort the spacer body. Follow applicable NEC guidelines for control panel assembly and enclosure work.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eOverall Length\u003c\/strong\u003e: 0.875 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\u003eInside Diameter\u003c\/strong\u003e: 0.141 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\u003eScrew Size\u003c\/strong\u003e: No. 6\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\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\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: S553-M10-F21-G\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51739579875634,"sku":"S553-M10-F21-G","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64ed36ec3a1c33caaf172ec4e8fe95b6_dcdf76c6-4347-4e10-8d48-4be67bca93a3.jpg?v=1788816542","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s553-m10-f21-g-round-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}