{"product_id":"electro-hardware-ms1001m01f21f-circuit-board-spacer-m4","title":"Electro Hardware MS1001M01F21F Circuit Board Spacer M4","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE MS1001M01F21F is a round, female unthreaded circuit board spacer designed for M4 screw applications in printed circuit board assemblies. Manufactured from brass and finished with a zinc plating that meets ASTM B633 and QQ-B-626 Comp 22 Type 1 standards, this spacer provides reliable electrical isolation and mechanical standoff between a board and a mounting surface. The overall length is 1 mm, the outside diameter is 6 mm, and the inside diameter ranges from 4.2 mm to 4.8 mm. It is a metric-dimensioned fastener hardware component installed by electronics assembly technicians, PCB service professionals, and industrial maintenance personnel.\u003c\/p\u003e\n\u003cp\u003eThis spacer is suited for use in commercial and industrial PCB assembly environments where a low-profile, metric standoff is required. The compact 1 mm OAL makes it appropriate for tight board stack applications where minimal clearance is needed between the circuit board and the mounting substrate. The zinc plating provides corrosion resistance in standard indoor environments. The female unthreaded bore accepts M4 fasteners, making it compatible with common metric hardware used across HVAC control boards, industrial control panels, and electronic enclosures.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBrass construction with zinc plating meeting ASTM B633 and QQ-B-626 Comp 22 Type 1 standards\u003c\/li\u003e\n  \u003cli\u003eFemale unthreaded bore sized for M4 screw applications\u003c\/li\u003e\n  \u003cli\u003e1 mm overall length for low-profile board standoff applications\u003c\/li\u003e\n  \u003cli\u003eInside diameter range of 4.2 mm to 4.8 mm with a tolerance of 0.000 to 0.270 mm\u003c\/li\u003e\n  \u003cli\u003eRound body shape with 6 mm outside diameter for consistent seating on PCB mounting pads\u003c\/li\u003e\n  \u003cli\u003eMetric dimensioned hardware suitable for international and domestic PCB assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or supplemental hardware component for circuit board assemblies requiring a metric M4 female unthreaded round spacer with a 1 mm standoff height.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCircuit board spacers of this type are installed by electronics assembly technicians and PCB service professionals. Always de-energize and discharge the circuit board assembly before installing or replacing spacers to prevent damage to sensitive components. Use calibrated metric hand tools and avoid over-torquing the mating M4 fastener, as brass hardware is susceptible to thread deformation under excessive load. Follow applicable industry guidelines for PCB assembly and rework when replacing standoff hardware in control board applications.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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: M4\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: 1 mm\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: 4.2 mm 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\u003eOutside Diameter\u003c\/strong\u003e: 6 mm\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: 0.00192 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161816\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: MS1001M01F21F\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51732209107250,"sku":"MS1001M01F21F","price":20.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ebd8695a24e2b6532e3d3f30a7e1347f_62d2745f-c683-468a-9f86-94365d01021a.jpg?v=1788740436","url":"https:\/\/voomisupply.com\/products\/electro-hardware-ms1001m01f21f-circuit-board-spacer-m4","provider":"Voomi Supply","version":"1.0","type":"link"}