{"product_id":"osg-1122500-straight-flute-tap-1-2-13-unc-plug-3b-hss","title":"Osg 1122500 Straight Flute Tap 1\/2-13 Unc Plug 3B Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1122500 is a straight flute tap designed to cut 1\/2-13 UNC internal threads in a wide range of ferrous and non-ferrous metals. Built from high-speed steel with a bright, uncoated finish, it features a plug chamfer for general-purpose through-hole and blind-hole tapping. With 4 flutes and an H3 thread limit, this tap produces accurate 3B class of fit threads suitable for standard fastener assemblies. Overall length is 3.375 inches, thread length is 1.656 inches, and the shank diameter is 0.367 inches. It is intended for use in manual tapping handles, drill presses, and CNC tapping operations where a straight flute geometry is appropriate for the material and application.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for production and maintenance tapping in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The plug chamfer makes it a practical choice for starting threads in through-holes or sufficiently deep blind holes where the chamfer lead can fully engage before reaching the bottom. It fits standard tap holder collets that accept the 0.367-inch shank diameter and 0.275-inch square drive. Typical use cases include fabrication shops, machine shops, and field maintenance where 1\/2-13 UNC threads are required in structural and mechanical assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-13 UNC thread form with 4 straight flutes for general-purpose through-hole and blind-hole tapping\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer provides a gradual thread lead-in, reducing starting torque and improving alignment\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit and 3B class of fit for standard fastener clearance and accurate thread geometry\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides durability across a broad range of common workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish is compatible with standard cutting fluids and tapping compounds\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction; no coolant-through feature, suitable for flood or manual lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard replacement or production tap for applications requiring 1\/2-13 UNC, 3B class of fit internal threads. Compatible with material types including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel per OSG Series 101 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall in a properly sized tap wrench, tapping head, or rigid CNC tap holder that matches the 0.275-inch square drive. Secure the workpiece and apply an appropriate cutting fluid or tapping compound for the material being tapped before beginning the operation. Back the tap off periodically to break chips and prevent tap breakage, especially in blind holes. Follow shop safety procedures and wear appropriate eye protection whenever performing tapping operations.\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 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 13\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.656 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.811 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.367 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.275 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Aluminum, Cast Iron, Low-Carbon Steel, Medium-Carbon Steel, High-Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 101\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.107 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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1122500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743277580594,"sku":"1122500","price":38.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5a70058e6a61df8fa2de809ed1f75be7.jpg?v=1788844954","url":"https:\/\/voomisupply.com\/products\/osg-1122500-straight-flute-tap-1-2-13-unc-plug-3b-hss","provider":"Voomi Supply","version":"1.0","type":"link"}