{"product_id":"value-collection-r88448642-4-40-x-1-4-button-head-machine-screw","title":"Value Collection R88448642 4-40 X 1\/4 Button Head Machine Screw","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION R88448642 is a 4-40 x 1\/4 inch button head machine screw designed for precision fastening applications in mechanical assemblies, electrical enclosures, and equipment fabrication. Constructed from 18-8 stainless steel with a bright, uncoated finish, this screw offers solid corrosion resistance suitable for indoor and light outdoor use. The Pin-In Torx drive provides tamper-resistance and improved driver engagement compared to standard Torx profiles. Length is measured under the head. Thread standard is UNC (Unified National Coarse), sized at 4-40. This fastener is handled and installed by millwrights, electricians, mechanical technicians, and equipment assemblers working across light-duty industrial and commercial settings.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for applications requiring a low-profile button head with secure torque transfer, including panel mounting, electronic chassis assembly, light structural bracketing, and general-purpose machine fastening. The 4-40 thread size is commonly found in instrumentation, control panels, HVAC equipment covers, and electrical device assemblies where small-diameter fasteners are specified. The minimum order quantity is 25 pieces per order, with each package containing 1 unit.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e18-8 stainless steel construction provides corrosion resistance and durability in light-duty environments\u003c\/li\u003e\n  \u003cli\u003eButton head profile delivers a low-profile, finished appearance suitable for visible panel applications\u003c\/li\u003e\n  \u003cli\u003ePin-In Torx drive adds tamper resistance and reduces cam-out during installation\u003c\/li\u003e\n  \u003cli\u003e4-40 UNC thread standard ensures compatibility with standard tapped holes and nuts of the same designation\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish maintains dimensional accuracy and avoids coating buildup in tight tolerances\u003c\/li\u003e\n  \u003cli\u003eLength measured under head at 1\/4 inch for precise fit in shallow or through-hole applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 4-40 UNC machine screw for use in any tapped hole or threaded insert conforming to the 4-40 Unified National Coarse thread standard.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by mechanical technicians or assemblers using a Pin-In Torx bit of the appropriate size. Verify that the mating tapped hole or nut is 4-40 UNC before driving the screw to avoid cross-threading. Do not exceed the rated torque range for 18-8 stainless steel fasteners of this diameter, as overtightening can cause galling or thread failure. Ensure the fastener length under head is appropriate for the material stack-up to achieve full thread engagement.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength (Under Head)\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Button\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Pin-In Torx\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 18-8 Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright \/ Uncoated\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: 0.002 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: R88448642\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51690691330354,"sku":"R88448642","price":1167.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/83dc675ba3de4ce44f42b476995ab5f4.jpg?v=1788274026","url":"https:\/\/voomisupply.com\/products\/value-collection-r88448642-4-40-x-1-4-button-head-machine-screw","provider":"Voomi Supply","version":"1.0","type":"link"}