{"product_id":"holo-krome-640010280-button-socket-cap-screw-5-40","title":"Holo-krome 640010280 Button Socket Cap Screw 5-40","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HOLO-KROME 640010280 is a 5-40 button socket cap screw designed for applications requiring a low-profile fastener with high tensile strength. The button head style provides a wide bearing surface and a rounded top profile, making it suited for assemblies where clearance above the joint surface is limited. Drive engagement is via a 5\/64-inch hex socket. The screw is fully threaded, manufactured from alloy steel, and finished in black oxide for mild corrosion resistance and reduced reflectivity. Thread fit is Class 3A, indicating a standard close tolerance for general mechanical assembly. Hardness is rated at 38 HRC.\u003c\/p\u003e\u003cp\u003eThis fastener is used in light mechanical assemblies, precision equipment, and machine components where a clean, flush-profile head is needed. The 1\/4-inch length under head and 5-40 UNC thread make it appropriate for thin-section or sheet metal applications. It is commonly installed by machinists, mechanical assemblers, and equipment technicians working with small-format fasteners in tight-clearance environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eButton head profile provides low clearance height of 0.066 inches above the mating surface\u003c\/li\u003e\n\u003cli\u003e5\/64-inch hex socket drive for precise torque application in confined spaces\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction rated at 38 HRC hardness\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish for mild corrosion resistance and low-reflectivity surface\u003c\/li\u003e\n\u003cli\u003eClass 3A thread fit per ANSI\/ASME B18.3 and ASTM F835\u003c\/li\u003e\n\u003cli\u003eFully threaded shank along the 0.25-inch length under head\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use fastener for mechanical assemblies requiring a 5-40 UNC fully threaded button socket cap screw per ANSI\/ASME B18.3 and ASTM F835 standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a 5\/64-inch hex key or hex socket bit. Power down or de-energize any equipment before accessing fastener locations in live assemblies. Follow applicable torque guidelines for 5-40 alloy steel fasteners per the relevant ASME standard. Avoid overtightening, as the small thread diameter is susceptible to thread stripping under excessive load.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNRC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Fit Class\u003c\/strong\u003e: 3A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Button\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.238 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.066 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 5\/64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 38 HRC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ANSI\/ASME B18.3 and ASTM F835\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HOLO-KROME\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 640010280\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51734082158898,"sku":"640010280","price":3583.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/38637a475e2cb330b095c48d3759a841.jpg?v=1788760816","url":"https:\/\/voomisupply.com\/products\/holo-krome-640010280-button-socket-cap-screw-5-40","provider":"Voomi Supply","version":"1.0","type":"link"}