{"product_id":"value-collection-40526-set-screw-1-4-28-x-5-16-in-grade-8-50pk","title":"Value Collection 40526 Set Screw 1\/4-28 X 5\/16 in Grade 8 50pk","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 40526 is a 1\/4-28 UNF alloy steel set screw with a knurled cup point, offered in a pack of 50. Set screws are headless fasteners used to secure a component — such as a collar, gear, or pulley — against or onto a shaft by applying direct force through the point. This screw measures 5\/16 inches in overall length and is driven with a 1\/8-inch hex key. Built to Grade 8 alloy steel, it delivers high tensile strength suitable for demanding mechanical assemblies. Machinists, millwrights, and maintenance technicians are the typical installers of this fastener type.\u003c\/p\u003e\n\u003cp\u003eThis set screw is appropriate for use in light-to-heavy mechanical assemblies where shaft retention or positioning is required. The knurled cup point bites into the mating surface to resist rotation and axial movement without requiring a nut or bolt head. Applications include motor shafts, conveyor components, HVAC blower wheel hubs, and general industrial assemblies. The fine UNF thread pitch (1\/4-28) provides precise thread engagement and greater resistance to loosening under vibration compared to coarse thread equivalents.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKnurled cup point for increased grip and surface bite on mating shaft material\u003c\/li\u003e\n  \u003cli\u003e1\/4-28 UNF fine thread for precise engagement and vibration resistance\u003c\/li\u003e\n  \u003cli\u003eGrade 8 alloy steel construction for high tensile and torsional strength\u003c\/li\u003e\n  \u003cli\u003e1\/8-inch hex drive — compatible with standard hex keys and Allen wrenches\u003c\/li\u003e\n  \u003cli\u003eMeets ASME\/ANSI B18.3 and ASTM F912 fastener standards\u003c\/li\u003e\n  \u003cli\u003ePack of 50 for job-site or shop stock replenishment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 1\/4-28 UNF headless set screw suitable for use in any mechanical assembly requiring a knurled cup point fastener conforming to ASME\/ANSI B18.3 and ASTM F912 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists, millwrights, or qualified maintenance technicians using a 1\/8-inch hex key or Allen wrench. De-energize and lock out all rotating equipment before installing or adjusting set screws. Do not exceed the torsional limits of the hex socket — use a properly sized hex key to avoid rounding the drive. Verify thread engagement depth is sufficient for the clamping load of the application before returning equipment to service.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Knurled Cup\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Key Size\u003c\/strong\u003e: 1\/8 inches (0.1250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME\/ANSI B18.3, ASTM F912\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 50 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 40526\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51691730731314,"sku":"40526","price":43.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/894a387bf56d15e403a99d9a491b329b.jpg?v=1788288957","url":"https:\/\/voomisupply.com\/products\/value-collection-40526-set-screw-1-4-28-x-5-16-in-grade-8-50pk","provider":"Voomi Supply","version":"1.0","type":"link"}