{"product_id":"electro-hardware-p545m01f21-440-round-female-standoff-4-40","title":"Electro Hardware P545M01F21-440 Round Female Standoff 4-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE P545M01F21-440 is a round female standoff designed to create fixed spacing between PCBs, panels, and enclosure components. Machined from brass with a zinc-plated finish, this fully threaded standoff accepts a 4-40 machine screw on both ends. It measures 0.75 inches overall length with a 0.25 inch outside diameter and a full 1 inch thread depth. The zinc plating meets ASTM B633 Type 1 and QQ-B-626 Comp 22 standards, providing corrosion resistance suitable for control panel and electronic assembly applications. Electricians, panel builders, and electronics technicians install this type of hardware during enclosure builds and PCB mounting assemblies.\u003c\/p\u003e\n\u003cp\u003eThis standoff is used in residential and commercial electrical enclosures, electronic control assemblies, and industrial panel builds where a 4-40 threaded female-to-female spacer is required. It is well suited for securing circuit boards, mounting plates, and subassemblies at a consistent 0.75 inch standoff height. The fully threaded interior allows fastener engagement from either end, making it adaptable to a range of stacking and mounting configurations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFully threaded female interior accepts 4-40 machine screws from both ends\u003c\/li\u003e\n  \u003cli\u003eBrass construction with zinc-plated finish per ASTM B633 Type 1 and QQ-B-626 Comp 22\u003c\/li\u003e\n  \u003cli\u003eRound body profile with 0.25 inch outside diameter for compact PCB and panel layouts\u003c\/li\u003e\n  \u003cli\u003e0.75 inch overall length with length tolerance of -0.005 to 0.005 inches\u003c\/li\u003e\n  \u003cli\u003e1 inch thread depth provides full fastener engagement through the standoff body\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 4-40 threaded round female standoff for use in PCB mounting, electrical enclosures, and panel assembly applications where inch-series fastener hardware is specified.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by electricians or electronics technicians during panel assembly or PCB mounting operations. Ensure mating screws are 4-40 inch-series fasteners of appropriate length for the application. Do not overtighten, as brass is a softer material that can be damaged by excessive torque. Power down all circuits and discharge any capacitors before working inside electrical enclosures.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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: 0.75 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: Brass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\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\u003eStandards\u003c\/strong\u003e: ASTM B633 Type 1, QQ-B-626 Comp 22\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\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: P545M01F21-440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51739876262194,"sku":"P545M01F21-440","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/24a5d05114a707e7b06a2620b31fbd67_68f7654f-010e-4528-9c7b-e41e74e948ed.jpg?v=1788819938","url":"https:\/\/voomisupply.com\/products\/electro-hardware-p545m01f21-440-round-female-standoff-4-40","provider":"Voomi Supply","version":"1.0","type":"link"}