{"product_id":"electro-hardware-ms1021m04f16f-round-board-spacer-m4","title":"Electro Hardware MS1021M04F16F Round Board Spacer M4","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE MS1021M04F16F is a round, female unthreaded circuit board spacer machined from Aluminum Grade T3 to fastener standard QQ-A-225A Comp 2. It accepts an M4 screw and measures 11 mm (approximately 0.433 inches) overall length with a 6 mm (approximately 0.236 inches) outside diameter and an inside diameter ranging from 4.2 to 4.8 mm (approximately 0.165 to 0.189 inches). The uncoated bright finish leaves the aluminum surface bare, which suits applications where added coatings would interfere with tight dimensional tolerances. Electronics technicians and PCB assembly professionals use this spacer to maintain precise standoff distances between a circuit board and a mounting surface or between stacked boards.\u003c\/p\u003e\u003cp\u003eThis spacer is suited for metric-fastener PCB assemblies in light industrial, commercial electronics, and control-panel applications where consistent board separation and reliable M4 thread engagement are required. Its compact outside diameter of 6 mm makes it appropriate for densely populated boards where clearance between components is limited. The female unthreaded body allows an M4 screw to pass through or seat against the spacer without threading into the spacer itself, simplifying removal and reinstallation during service.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale unthreaded body sized for M4 screw clearance\u003c\/li\u003e\n\u003cli\u003e11 mm overall length with a tight length tolerance of -0.130 to 0.130 mm\u003c\/li\u003e\n\u003cli\u003e6 mm outside diameter for use in tight board layouts\u003c\/li\u003e\n\u003cli\u003eInside diameter range of 4.2 to 4.8 mm with a tolerance of 0.000 to 0.270 mm\u003c\/li\u003e\n\u003cli\u003eAluminum Grade T3 construction per fastener standard QQ-A-225A Comp 2\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish — no added coating to affect fit or conductivity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a metric M4 round circuit board spacer for use in PCB standoff and board-stacking applications requiring a female unthreaded aluminum spacer with a 6 mm outside diameter and 11 mm overall length.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electronics technicians or electricians working on control panels and PCB assemblies. Power down and de-energize the board assembly fully before installing or removing spacers. Use correctly sized M4 fasteners to avoid deforming the unthreaded bore. Follow applicable IPC assembly standards and any equipment-specific torque requirements provided by the board or enclosure manufacturer.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Aluminum Grade T3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: QQ-A-225A Comp 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Screw Size\u003c\/strong\u003e: M4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Type\u003c\/strong\u003e: Female Unthreaded Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 11 mm (approximately 0.433 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\u003eOutside Diameter\u003c\/strong\u003e: 6 mm (approximately 0.236 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.2 to 4.8 mm (approximately 0.165 to 0.189 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\u003eFinish\u003c\/strong\u003e: Bright \/ Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.00216 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Metric\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: MS1021M04F16F\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51727427436850,"sku":"MS1021M04F16F","price":17.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e0a405ceb63c0dd5c1dbdb7f5517a2d3.jpg?v=1788677812","url":"https:\/\/voomisupply.com\/products\/electro-hardware-ms1021m04f16f-round-board-spacer-m4","provider":"Voomi Supply","version":"1.0","type":"link"}