{"product_id":"electro-hardware-p577m10f21-440-round-female-standoff","title":"Electro Hardware P577M10F21-440 Round Female Standoff","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ELECTRO HARDWARE P577M10F21-440 is a round female standoff designed for use in electronic assemblies, control panels, and chassis builds where secure, threaded spacing between components is required. Machined from Grade 2 steel with a zinc-plated finish that meets ASTM B633 Type 1 and QQ-S-633 standards, this standoff provides corrosion resistance suitable for indoor electrical enclosures. It features a 4-40 thread size, a 1.25-inch overall length, and a 0.25-inch outside diameter. The fully threaded interior accepts a standard 4-40 fastener to a depth of 1 inch, allowing reliable engagement with mating hardware. Electricians, panel builders, and electronics technicians install these standoffs during enclosure fabrication and board mounting work.\u003c\/p\u003e\u003cp\u003eThis standoff is well suited for residential and commercial control panel assemblies, printed circuit board mounting, and electronic chassis construction. The inch-system sizing and 4-40 thread make it compatible with a wide range of standard fastener hardware used in low-voltage control wiring, instrument enclosures, and electronic sub-assemblies. It is particularly useful wherever a fixed, non-collapsing spacer is needed to maintain consistent clearance between mounted components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 thread size, fully threaded interior for reliable fastener engagement\u003c\/li\u003e\n\u003cli\u003e1 inch thread depth provides full engagement for standard 4-40 fasteners\u003c\/li\u003e\n\u003cli\u003e1.25-inch overall length for consistent component spacing\u003c\/li\u003e\n\u003cli\u003e0.25-inch outside diameter in a round body profile\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel construction with zinc-plated finish\u003c\/li\u003e\n\u003cli\u003eMeets ASTM B633 Type 1 and QQ-S-633 finish standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard inch-series female standoff for use with 4-40 threaded fasteners in electronic enclosures, control panels, and PCB mounting applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by electricians, panel builders, and electronics technicians using standard hand tools. De-energize all circuits in the enclosure before installing or removing standoffs in live panels. Avoid overtightening mating screws, as the 4-40 thread is fine-pitched and can be damaged by excessive torque. Follow applicable NEC guidelines when installing hardware inside electrical enclosures.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.25 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\u003eThread Depth\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASTM B633 Type 1, QQ-S-633\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\u003eSystem of Measurement\u003c\/strong\u003e: Inch\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: P577M10F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51741466788146,"sku":"P577M10F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/24a5d05114a707e7b06a2620b31fbd67_738911a5-72f1-49ef-880e-28bd6a74f7b0.jpg?v=1788831655","url":"https:\/\/voomisupply.com\/products\/electro-hardware-p577m10f21-440-round-female-standoff","provider":"Voomi Supply","version":"1.0","type":"link"}