{"product_id":"osg-2855001-spiral-point-tap-1-4-20-unc-3-flute-plug","title":"Osg 2855001 Spiral Point Tap 1\/4-20 Unc 3 Flute Plug","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 2855001 is a spiral point tap designed for threading 1\/4-20 UNC holes in a wide range of ferrous and non-ferrous materials. Manufactured from Vanadium High Speed Steel (HSS-E) with a steam oxide coating, this plug chamfer tap pushes chips forward ahead of the cutting edge, making it well suited for through-hole tapping operations. The H11 thread limit ensures controlled oversize tolerance for reliable fit with standard UNC fasteners. At 2.5 inches overall length with a 0.594-inch thread length, the 2855001 fits standard tap holders and is a direct-use replacement for production and maintenance work.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for through-hole applications in materials including aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, hardened steel, and cast iron. The three-flute geometry provides a balance of chip clearance and cutting stability across this broad material range. Typical use cases include production tapping on CNC machining centers, drill presses, and manual tapping operations in job shops, maintenance facilities, and manufacturing environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSpiral point design pushes chips forward for clean through-hole tapping\u003c\/li\u003e\n  \u003cli\u003eVanadium High Speed Steel (HSS-E) construction for extended tool life in tough materials\u003c\/li\u003e\n  \u003cli\u003eSteam oxide coating reduces friction and improves lubricity during cutting\u003c\/li\u003e\n  \u003cli\u003eH11 thread limit provides controlled oversize tolerance for standard UNC fit\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction, 3 flutes, plug chamfer entry\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through required — suitable for conventional flood or manual lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for through-hole tapping of 1\/4-20 UNC threads across aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, hardened steel, and cast iron. Compatible with standard 1\/4-inch tap holders and chucks accepting a 0.255-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall in a standard tap holder or chuck rated for the shank diameter before use. Always apply cutting fluid or tapping compound appropriate for the workpiece material to extend tap life and improve thread quality. Ensure the workpiece is securely fixtured and that the tap is aligned perpendicular to the drilled hole before engagement. Follow applicable shop safety practices and use appropriate RPM settings for the material being tapped.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H11\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Vanadium High Speed Steel (HSS-E)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Steam Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.594 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversize\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupted Thread\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 280\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.031 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: 2855001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748297605426,"sku":"2855001","price":34.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f037cfbe3d1872fe259a871295acd92f_002b6d6d-f519-4490-bd98-cd5e523d339b.jpg?v=1788891988","url":"https:\/\/voomisupply.com\/products\/osg-2855001-spiral-point-tap-1-4-20-unc-3-flute-plug","provider":"Voomi Supply","version":"1.0","type":"link"}