{"product_id":"electro-hardware-ms1039m01f21f-circuit-board-spacer-m4","title":"Electro Hardware MS1039M01F21F Circuit Board Spacer M4","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE MS1039M01F21F is a round, female unthreaded circuit board spacer designed to create precise standoff gaps between PCBs and mounting surfaces. Manufactured from brass with a zinc-plated finish meeting ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer measures 20 mm overall length with an outside diameter of 6 mm and an inside diameter ranging from 4.2 to 4.8 mm. It is sized for M4 screw hardware. The zinc plating provides corrosion resistance in light-duty electronic assembly environments. Electronics assembly technicians and field service engineers use this spacer in PCB mounting applications across industrial control panels, HVAC control boards, and similar electrical enclosures.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for metric-standard PCB assemblies requiring an M4 fastener and a 6 mm OD standoff. Typical applications include mounting control boards inside residential and light commercial HVAC equipment, electrical enclosures, and industrial automation panels where consistent board-to-chassis clearance is required. The female unthreaded design accepts an M4 screw passed through from the mounting surface side. Minimum order quantity is 10 units.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale unthreaded round spacer accepts M4 screw hardware\u003c\/li\u003e\n\u003cli\u003eBrass body with zinc-plated finish meeting ASTM B633 and QQ-B-626 Comp 22 Type 1\u003c\/li\u003e\n\u003cli\u003e20 mm overall length with a length tolerance of -0.13 to 0.13 mm for precision stacking\u003c\/li\u003e\n\u003cli\u003e6 mm outside diameter with 4.2 to 4.8 mm inside diameter range\u003c\/li\u003e\n\u003cli\u003eMetric measurement system for compatibility with M4 fastener assemblies\u003c\/li\u003e\n\u003cli\u003eLightweight at approximately 0.01 pounds per unit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a metric-standard M4 circuit board spacer for use in PCB mounting assemblies requiring a 6 mm OD, 20 mm standoff height.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians or field service personnel during control board assembly or replacement. Always de-energize and lock out the equipment before working inside any electrical enclosure. Use the correct M4 driver or hex tool to avoid stripping the mating fastener. Follow applicable NEC guidelines when mounting control boards inside energized 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\u003eFor Thread Size\u003c\/strong\u003e: M4\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\u003eOverall Length\u003c\/strong\u003e: 20 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: -0.13 to 0.13 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 6 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.2 to 4.8 mm\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\u003eSystem of Measurement\u003c\/strong\u003e: Metric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\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: MS1039M01F21F\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51732704330034,"sku":"MS1039M01F21F","price":27.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ebd8695a24e2b6532e3d3f30a7e1347f_714e1391-1ac4-4cea-86af-ae8fd9ffcdd9.jpg?v=1788745879","url":"https:\/\/voomisupply.com\/products\/electro-hardware-ms1039m01f21f-circuit-board-spacer-m4","provider":"Voomi Supply","version":"1.0","type":"link"}