{"product_id":"hertel-k007063as-hand-sti-tap-5-16-18-unc-h4-plug-chamfer","title":"Hertel K007063AS Hand Sti Tap 5\/16-18 Unc H4 Plug Chamfer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL K007063AS is a hand STI (Screw Thread Insert) tap designed for cutting internal threads that accept Helicoil-style wire thread inserts. Ground to an H4 thread limit with a 5\/16-18 UNC thread form, this tap produces oversized threads sized to accept standard helical coil inserts, restoring or creating strong threaded holes in worn or soft parent materials. The 4-flute, plug chamfer geometry makes it well suited for through-hole tapping in a range of metals. Manufactured from high-speed steel with a bright uncoated finish, it delivers consistent thread form across production and repair work. Overall length is 2-15\/16 inches with a 1-1\/4 inch thread length.\u003c\/p\u003e\u003cp\u003eThis tap is used in maintenance, repair, and manufacturing applications where threaded inserts are required to reinforce threads in aluminum, cast iron, steel, and similar materials. The plug chamfer provides a gradual lead-in, making it practical for both through holes and deeper blind holes where some lead room is available. It is a hand tap intended for use with a standard tap wrench or similar manual driver and is not designed for machine tapping under power.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5\/16-18 UNC thread form ground to H4 thread limit for STI insert applications\u003c\/li\u003e\n\u003cli\u003e4-flute design provides good chip clearance and thread surface finish\u003c\/li\u003e\n\u003cli\u003ePlug chamfer with gradual lead-in suits through-hole and accessible blind-hole tapping\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish — no coating buildup to affect tolerance in precision thread repair work\u003c\/li\u003e\n\u003cli\u003eHelicoil reference number 5CPA for cross-referencing insert system compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Helicoil-style screw thread inserts; Helicoil reference number 5CPA. Produces oversized 5\/16-18 UNC internal threads sized to accept standard helical coil wire thread inserts.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis is a hand tap and should be driven with a tap wrench — do not use in a power tapping head or drill press chuck without appropriate torque control. Before tapping, drill the correct STI tap drill size for the 5\/16-18 insert being installed; the required drill diameter differs from a standard 5\/16-18 tap drill. Apply cutting fluid appropriate to the workpiece material and back the tap off periodically to break chips. Ensure the workpiece is securely fixtured before starting the thread.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.9375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\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\u003eHelicoil Reference Number\u003c\/strong\u003e: 5CPA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: K007063AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51753801613618,"sku":"K007063AS","price":24.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5df9eeb00fe13db97032c66f738d5a18.jpg?v=1788940793","url":"https:\/\/voomisupply.com\/products\/hertel-k007063as-hand-sti-tap-5-16-18-unc-h4-plug-chamfer","provider":"Voomi Supply","version":"1.0","type":"link"}