{"product_id":"electro-hardware-s529-m10-f21-g-round-circuit-board-spacer","title":"Electro Hardware S529-M10-F21-G Round Circuit Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE S529-M10-F21-G is a round, female unthreaded circuit board spacer designed to create a fixed standoff gap between a PCB and a mounting surface. Machined from Grade 2 steel with a zinc-plated finish that meets ASTM B633 and QQ-S-633 Type 1 standards, this spacer measures 0.5 inches in overall length with an outside diameter of 0.25 inches and an inside diameter of 0.141 inches. It is sized for a No. 6 screw. Electronics technicians, panel builders, and control board assembly technicians use this spacer to protect circuit boards from contact shorts and to maintain consistent clearance in enclosures.\u003c\/p\u003e\n\u003cp\u003eThis spacer is suited for residential and light commercial control panel assemblies, HVAC control boards, electrical enclosures, and general PCB mounting applications where a No. 6 fastener is used. The zinc-plated steel construction resists corrosion in typical indoor environments, making it appropriate for use inside equipment cabinets, junction boxes, and control modules. It installs with standard hand tools and requires no threading into the spacer body itself, as it is a female unthreaded design that accepts a passing fastener from the board side.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFemale unthreaded, round body accepts No. 6 screws for straightforward PCB standoff mounting\u003c\/li\u003e\n  \u003cli\u003e0.5 inches overall length provides consistent board-to-surface clearance\u003c\/li\u003e\n  \u003cli\u003e0.25 inches outside diameter and 0.141 inches inside diameter with tight length tolerance of -0.005 to 0.005 inches\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\u003eInside diameter tolerance of 0.000 to 0.010 inches ensures reliable fastener fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style spacer for circuit board mounting applications requiring a No. 6 screw, 0.5 inch standoff height, and a round female unthreaded body in inch measurements.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall using standard screwdrivers or nut drivers appropriate for No. 6 fasteners. De-energize all electrical panels and control boards before handling or replacing PCB spacers to prevent shorts or component damage. Do not overtighten fasteners through the unthreaded bore, as excessive force can crack the circuit board or deform the spacer. Follow applicable NEC guidelines for control panel assembly and PCB mounting clearances.\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: 0.25 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\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\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: S529-M10-F21-G\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51743140577586,"sku":"S529-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_5553f089-efef-43c4-b50d-84e8e4a6a870.jpg?v=1788843154","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s529-m10-f21-g-round-circuit-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}