{"product_id":"vlier-sch347-thumb-screw-1-2-13-knurled-head-steel","title":"Vlier SCH347 Thumb Screw 1\/2-13 Knurled Head Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER SCH347 is a steel thumb screw designed for tool-free manual adjustment and clamping applications in industrial and mechanical assembly work. It features a knurled head for positive finger grip and a swivel pad tip that pivots up to 7.5 degrees, allowing the tip to seat flush against angled or irregular surfaces without marring the workpiece. The 1\/2-13 UNC thread is a common coarse-pitch standard suited to steel fixtures and tooling plates. A black oxide finish provides mild corrosion resistance and reduces light glare on the fastener head. This part is typically installed and adjusted by machinists, toolmakers, and maintenance technicians.\u003c\/p\u003e\n\u003cp\u003eThe SCH347 fits applications where repeatable manual clamping or positioning is required without tools. Common use cases include jig and fixture building, machine tool setups, and workholding systems in manufacturing environments. The swivel pad tip design is especially useful when clamping against surfaces that are not perfectly perpendicular to the screw axis. No shoulder is present on this version, making it appropriate for direct thread-through mounting without a locating register.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-13 UNC coarse thread for broad compatibility with standard tapped steel fixtures\u003c\/li\u003e\n  \u003cli\u003eKnurled head, 1.25 inches in diameter, for secure finger tightening without tools\u003c\/li\u003e\n  \u003cli\u003eSwivel pad tip with 7.5-degree pivot range accommodates angled clamping surfaces\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for mild corrosion resistance and low-glare appearance\u003c\/li\u003e\n  \u003cli\u003eWithout-shoulder design for direct thread-through mounting\u003c\/li\u003e\n  \u003cli\u003eManufactured to ISO 9001 quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 1\/2-13 UNC thumb screw for use in jigs, fixtures, tooling plates, and other workholding or positioning assemblies that accept a 1\/2-13 tapped hole.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and adjustment are typically performed by hand; no wrench is required or recommended for standard clamping torque. Ensure the mating tapped hole is clean and free of debris before threading in the screw. Power down or lock out any machinery before adjusting fixturing screws during setup changes. Do not exceed the manual clamping force appropriate for the application, as overtightening by hand is generally self-limiting but can damage soft workpieces.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Knurled\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTip Type\u003c\/strong\u003e: Swivel Pad\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTip Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTip Diameter\u003c\/strong\u003e: 0.4000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTip Swivel Angle\u003c\/strong\u003e: 7.5 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Type\u003c\/strong\u003e: Without Shoulder\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ISO 9001\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: VLIER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: SCH347\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51985431560498,"sku":"SCH347","price":60.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2728b5a5b8ea180e42df9c76d48a253c_b90710ee-07f3-4d60-8382-4bd4fda8811a.jpg?v=1789985422","url":"https:\/\/voomisupply.com\/products\/vlier-sch347-thumb-screw-1-2-13-knurled-head-steel","provider":"Voomi Supply","version":"1.0","type":"link"}