{"product_id":"value-collection-40528-set-screw-1-4-28-x-1-2-in-grade-8-50pk","title":"Value Collection 40528 Set Screw 1\/4-28 X 1\/2 in Grade 8 50pk","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 40528 is a 1\/4-28 x 1\/2-inch knurled cup point set screw manufactured from Grade 8 alloy steel. Set screws are headless fasteners used to secure a component — such as a collar, gear, or pulley — against a shaft, preventing rotation or axial movement. The knurled cup point bites into the mating surface for a firm, vibration-resistant grip. Driven with a 1\/8-inch hex key, this screw meets ASME\/ANSI B18.3 and ASTM F912 standards. Each package contains 50 pieces, making it practical for shop stock or service truck inventory. Applicable across HVAC, plumbing, and mechanical trades wherever shaft-locking fasteners are required.\u003c\/p\u003e\n\u003cp\u003eThis set screw is suited for light-to-medium duty applications in residential and commercial mechanical systems. Common uses include securing fan hubs, motor shaft collars, coupling assemblies, and valve stems. The UNF 1\/4-28 thread pitch is standard in precision mechanical assemblies where fine thread engagement and holding strength are critical. Tradespeople in HVAC, refrigeration, plumbing, and general mechanical service will find this fastener appropriate for routine shaft-locking tasks on equipment requiring a small-diameter, high-strength set screw.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKnurled cup point design bites into shaft surfaces for a secure, vibration-resistant hold\u003c\/li\u003e\n  \u003cli\u003eGrade 8 alloy steel construction provides high tensile and proof load strength\u003c\/li\u003e\n  \u003cli\u003e1\/4-28 UNF thread for precise engagement in fine-thread applications\u003c\/li\u003e\n  \u003cli\u003e1\/8-inch hex drive for standard hex key installation\u003c\/li\u003e\n  \u003cli\u003eMeets ASME\/ANSI B18.3 and ASTM F912 fastener standards\u003c\/li\u003e\n  \u003cli\u003eSold in a 50-piece pack for shop stock or multi-unit service use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 1\/4-28 UNF set screw suitable for use in any mechanical assembly calling for a knurled cup point, Grade 8 alloy steel headless fastener of 1\/2-inch overall length.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSet screws of this type are installed by licensed HVAC technicians, plumbers, and mechanical trades using a 1\/8-inch hex key or Allen driver. Always de-energize and lock out equipment before disassembling shaft assemblies. Tighten to the torque specification called out in the equipment manufacturer documentation — do not rely on feel alone for Grade 8 fasteners. Inspect threads for damage before installation; cross-threading a set screw in a precision tapped bore may require bore repair or replacement of the mating component.\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 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 0.5 inches (overall)\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 inch (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: 40528\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51721748709682,"sku":"40528","price":35.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/22318508008c913141856833f57f8671.jpg?v=1788580273","url":"https:\/\/voomisupply.com\/products\/value-collection-40528-set-screw-1-4-28-x-1-2-in-grade-8-50pk","provider":"Voomi Supply","version":"1.0","type":"link"}