{"product_id":"electro-hardware-ms1039m01f21d-circuit-board-spacer-m3","title":"Electro Hardware MS1039M01F21D Circuit Board Spacer M3","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE MS1039M01F21D is a round, female unthreaded circuit board spacer designed to create precise standoff clearance between a PCB and a mounting surface or adjacent board. Constructed from brass with a zinc-plated finish meeting ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer accepts an M3 screw and measures 20 mm in overall length. The inside diameter ranges from 3.2 to 3.6 mm, and the outside diameter is 6 mm. Electronics assemblers, electrical technicians, and PCB repair professionals use this spacer in both production and field-service applications where consistent board-to-board or board-to-chassis spacing is required.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for metric-fastener assemblies in residential and commercial electronics, control panels, and industrial PCB mounting configurations. The M3 thread compatibility makes it a standard fit in a wide range of low-voltage control board assemblies, enclosure-mounted electronics, and HVAC or appliance control modules that rely on metric hardware. It installs where dimensional consistency and corrosion resistance are required in the standoff column.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBrass body with zinc-plated finish for corrosion resistance per ASTM B633 and QQ-B-626 Comp 22 Type 1\u003c\/li\u003e\n\u003cli\u003eFemale unthreaded design accepts M3 screws for straightforward PCB standoff assembly\u003c\/li\u003e\n\u003cli\u003e20 mm overall length with a tight length tolerance of -0.13 to 0.13 mm for consistent stack height\u003c\/li\u003e\n\u003cli\u003eInside diameter of 3.2 to 3.6 mm with an inside diameter tolerance of 0.000 to 0.270 mm\u003c\/li\u003e\n\u003cli\u003e6 mm outside diameter in a compact round body profile\u003c\/li\u003e\n\u003cli\u003eMetric system of measurement for compatibility with M3 fastener ecosystems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-build component for metric PCB standoff applications requiring an M3 female unthreaded brass spacer with a 20 mm overall length.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians or electricians working on control board assemblies. Power down and de-energize all circuits before servicing any PCB or control enclosure. Use appropriate M3 fasteners and a calibrated torque tool to avoid over-stressing the unthreaded bore. Follow applicable NEC guidelines and equipment manufacturer instructions when mounting control boards in electrical enclosures.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass\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-B-626 Comp 22 Type 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Female Unthreaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 20 mm (approximately 0.787 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: -0.130 to 0.130 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 3.2 to 3.6 mm (approximately 0.126 to 0.142 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter Tolerance\u003c\/strong\u003e: 0.000 to 0.270 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 6 mm (approximately 0.236 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Metric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01048 pounds\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: MS1039M01F21D\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51750740459826,"sku":"MS1039M01F21D","price":27.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ebd8695a24e2b6532e3d3f30a7e1347f_da792f3e-bc02-43e7-9055-f637b872b2dd.jpg?v=1788919191","url":"https:\/\/voomisupply.com\/products\/electro-hardware-ms1039m01f21d-circuit-board-spacer-m3","provider":"Voomi Supply","version":"1.0","type":"link"}