{"product_id":"value-collection-111273pr-set-screw-1-4-28-x-1-2-in-grade-8","title":"Value Collection 111273PR Set Screw 1\/4-28 X 1\/2 in Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 111273PR 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 that thread fully into a tapped hole and bear directly against a mating surface to secure a component — such as a collar, pulley, or gear — to a shaft. The knurled cup point digs into the shaft surface to resist rotation and axial movement without requiring a separate locking element. Drive is 1\/8 inch hex (Allen key). This fastener conforms to ASME\/ANSI B18.3 and ASTM F912 standards and is suitable for applications requiring a high-strength, compact locking fastener.\u003c\/p\u003e\u003cp\u003eThis set screw is used in mechanical assemblies across industrial, HVAC, plumbing, and electrical applications where a flush or recessed fastener is required. Common install scenarios include securing shaft-mounted components on motors, blower wheels, fan hubs, and pump couplings. The 1\/4-28 UNF thread pitch provides fine-thread engagement suitable for thinner-walled hubs or applications where precise clamping adjustment is needed. Installation is performed by mechanical technicians or tradespeople using standard hex key tooling.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eKnurled cup point bites into shaft surface for positive rotational and axial retention\u003c\/li\u003e\n\u003cli\u003eGrade 8 alloy steel construction provides high tensile and torsional strength\u003c\/li\u003e\n\u003cli\u003e1\/4-28 UNF fine thread for precise depth adjustment and strong thread engagement\u003c\/li\u003e\n\u003cli\u003e1\/8 inch hex drive accepts standard Allen keys and hex bit drivers\u003c\/li\u003e\n\u003cli\u003eHeadless design sits flush or below surface for clearance-critical assemblies\u003c\/li\u003e\n\u003cli\u003eConforms to ASME\/ANSI B18.3 and ASTM F912 for dimensional and material compliance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in any tapped 1\/4-28 UNF threaded hole requiring a knurled cup point set screw per ASME\/ANSI B18.3. Verify thread size and hub material before installation; knurled cup points are best suited for steel and iron shaft materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eDe-energize and lock out any motor or driven equipment before servicing shaft-mounted components secured by set screws. Use a correctly sized 1\/8 inch hex key to avoid rounding the drive socket; do not use worn or undersized keys. Ensure the tapped hole is clean and free of debris before threading the fastener. Torque to the assembly specification for the application — do not over-drive, as Grade 8 set screws can damage softer shaft materials if excessive force is applied.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 1\/2 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 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\u003eMeasurement Type\u003c\/strong\u003e: Fractional Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161505\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 111273PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51716132864306,"sku":"111273PR","price":3183.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cc19097c951fc4956a59e8b353a1605a.jpg?v=1788522208","url":"https:\/\/voomisupply.com\/products\/value-collection-111273pr-set-screw-1-4-28-x-1-2-in-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}