{"product_id":"electro-hardware-s1359-m10-f21-i-round-board-spacer","title":"Electro Hardware S1359-M10-F21-I Round Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE S1359-M10-F21-I is a round, female unthreaded circuit board spacer designed to maintain precise standoff clearance between a PCB and a mounting surface. Manufactured from Grade 2 steel with a zinc-plated finish conforming to ASTM B633 and QQ-S-633 Type 1, this spacer provides corrosion resistance and dimensional stability in electronic enclosures and control panel assemblies. The spacer measures 0.5 inches overall length with a 0.5-inch outside diameter and a 0.194-inch inside diameter, sized for a No. 10 screw. Technicians and assemblers working on HVAC control boards, electrical panels, and similar equipment rely on this type of hardware for consistent, repeatable board mounting.\u003c\/p\u003e\n\u003cp\u003eThis spacer is suited for use in residential and light commercial electronic assemblies where a No. 10 fastener is used to secure a circuit board to a chassis or DIN-mounted enclosure. Typical applications include HVAC control board mounting, electrical panel PCB assemblies, and industrial control enclosures where board-to-surface clearance must be held to a tight tolerance. The female unthreaded bore accepts a No. 10 screw passed through from the board side, making it straightforward to stack or layer boards at a fixed standoff distance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFemale unthreaded design accepts No. 10 screws for simple pass-through mounting\u003c\/li\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\u003e0.5-inch overall length with tight length tolerance of -0.005 to 0.005 inches for consistent standoff height\u003c\/li\u003e\n  \u003cli\u003e0.194-inch inside diameter with inside diameter tolerance of 0.000 to 0.010 inches\u003c\/li\u003e\n  \u003cli\u003eRound body shape provides uniform contact and load distribution on PCB mounting holes\u003c\/li\u003e\n  \u003cli\u003eZinc-plated finish resists corrosion in enclosure and panel environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard No. 10 round female unthreaded circuit board spacer for use in electronic assemblies, control panels, and PCB mounting applications requiring a 0.5-inch standoff height.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by electronics assemblers, electricians, or HVAC technicians during control board servicing or panel assembly. Always de-energize the equipment and discharge any stored energy before handling circuit boards or installing spacers. Use a No. 10 screw of appropriate length to account for the 0.5-inch spacer stack height. Follow applicable NEC guidelines when working inside electrical enclosures.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 0.194 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\u003eThread Size\u003c\/strong\u003e: No. 10\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\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\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: S1359-M10-F21-I\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51743938838834,"sku":"S1359-M10-F21-I","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64ed36ec3a1c33caaf172ec4e8fe95b6_46053cc6-3241-452f-9c86-30885d9eaee9.jpg?v=1788851610","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s1359-m10-f21-i-round-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}