{"product_id":"electro-hardware-s521m17f16g-circuit-board-spacer","title":"Electro Hardware S521M17F16G Circuit Board Spacer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE S521M17F16G is a round, female unthreaded circuit board spacer designed to create consistent standoff clearance between a PCB and its mounting surface. Made from Nylon Grade 101 and meeting the MIL-P-17091B fastener standard, this spacer accepts a No. 6 screw and measures 0.375 inches overall length with a 0.25 inch outside diameter and a 0.141 inch inside diameter. The uncoated finish is appropriate for standard electronic assembly environments. Electricians, electronic technicians, and panel builders use these spacers during control board installations to maintain proper board-to-chassis spacing and prevent electrical contact with mounting surfaces.\u003c\/p\u003e\n\u003cp\u003eThis spacer is suited for residential and commercial applications wherever printed circuit boards require secure, insulated standoff mounting. Common use cases include HVAC control board assemblies, electrical panel subassemblies, and industrial control enclosures. Its nylon construction provides electrical insulation between the board and chassis, which is especially useful in low-voltage control circuits. The No. 6 screw thread size makes it compatible with a wide range of standard PCB mounting hardware used in trade equipment.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNylon Grade 101 construction provides electrical insulation and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eMeets MIL-P-17091B fastener standard for consistent dimensional quality\u003c\/li\u003e\n  \u003cli\u003eFemale unthreaded body accepts No. 6 screws for straightforward installation\u003c\/li\u003e\n  \u003cli\u003e0.375 inch overall length with tight length tolerance of -0.005 to 0.005 inches\u003c\/li\u003e\n  \u003cli\u003eInside diameter tolerance of 0.000 to 0.010 inches for reliable screw fit\u003c\/li\u003e\n  \u003cli\u003eUncoated bright finish compatible with standard PCB assembly processes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation spacer for circuit board assemblies requiring a No. 6 screw, round body, female unthreaded standoff with a 0.375 inch overall length and 0.25 inch outside diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by electricians or electronics technicians during control board assembly or replacement. Always de-energize the equipment and discharge any stored electrical energy before handling circuit boards or mounting hardware. Use a hand screwdriver rather than a power driver to avoid over-torquing nylon spacers, which can crack or deform under excessive force. Follow applicable NEC guidelines for low-voltage control wiring when reassembling the control panel after spacer installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Female Unthreaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrew Size\u003c\/strong\u003e: No. 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 0.375 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\u003eLength Tolerance\u003c\/strong\u003e: -0.005 to 0.005 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\u003eMaterial\u003c\/strong\u003e: Nylon Grade 101\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: MIL-P-17091B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.001 pounds\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: S521M17F16G\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51730716590386,"sku":"S521M17F16G","price":1017.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ce6d8e9e11b69c93ec30698d6d2c32c4.jpg?v=1788721713","url":"https:\/\/voomisupply.com\/products\/electro-hardware-s521m17f16g-circuit-board-spacer","provider":"Voomi Supply","version":"1.0","type":"link"}