{"product_id":"boneham-h4812jj-press-fit-headed-drill-bushing","title":"Boneham H4812JJ Press Fit Headed Drill Bushing","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BONEHAM H4812JJ is a Type H press fit headed drill bushing machined from steel for use in jig and fixture applications. It accepts a 23\/64-inch inside diameter with a tight tolerance of +0.0001 to +0.0005 inches, ensuring accurate drill guidance and repeatable hole location. The body outside diameter measures 3\/4 inch, the length under the head is 3\/4 inch, and the head outside diameter is 59\/64 inch with a head height of 7\/32 inch. Installation is permanent — this is a non-renewable bushing pressed directly into a drill jig plate. Machinists, toolmakers, and fixture builders are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis bushing is suited for production drilling operations where a fixed, permanent guide is required. It is pressed into a prepared hole in a drill jig or fixture plate and remains in place for the life of the tooling. Typical applications include metalworking shops, assembly fixtures, and precision machining environments where consistent hole location is critical across high part volumes. The headed design seats flush against the jig plate surface, preventing axial movement under drilling loads.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eType H headed press fit design — permanent, non-renewable installation\u003c\/li\u003e\n  \u003cli\u003eInside diameter: 23\/64 inch with tolerance of +0.0001 to +0.0005 inches for precise drill guidance\u003c\/li\u003e\n  \u003cli\u003eBody outside diameter: 3\/4 inch; length under head: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003eHead outside diameter: 59\/64 inch; head height: 7\/32 inch\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in repetitive drilling operations\u003c\/li\u003e\n  \u003cli\u003eNot counterbored — standard headed configuration for surface-mount seating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-install component for drill jigs and fixture plates requiring a Type H press fit headed bushing with a 23\/64-inch inside diameter and 3\/4-inch body outside diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by toolmakers or machinists using an arbor press or hydraulic press to drive the bushing into a precision-reamed hole in the jig plate. The mating hole in the fixture plate must be machined to the correct interference-fit diameter before installation. Once pressed in, this bushing is not intended for removal or replacement. Follow standard shop safety practices and ensure the fixture plate is properly supported to avoid distortion during pressing.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBushing Industry Code\u003c\/strong\u003e: H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation Method\u003c\/strong\u003e: Press Fit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 23\/64 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter Tolerance\u003c\/strong\u003e: +0.0001 to +0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Outside Diameter\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Outside Diameter\u003c\/strong\u003e: 59\/64 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 7\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead or Headless\u003c\/strong\u003e: Head\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRenewable Bushing\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounterbored\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: BONEHAM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: H4812JJ\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BONEHAM","offers":[{"title":"Default Title","offer_id":51739162509618,"sku":"H4812JJ","price":20.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b617461c6c05368cdcf2b33f32fca5ff_953aa62c-5b5d-4833-893d-4f9dbbefc3d9.jpg?v=1788810570","url":"https:\/\/voomisupply.com\/products\/boneham-h4812jj-press-fit-headed-drill-bushing","provider":"Voomi Supply","version":"1.0","type":"link"}