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The EAGLE CUTTING TOOL MT-330-350-B-I is a high-speed steel (HSS) metric bottom tap sized M33.0 x 3.50. Bottom taps, also called plug-finishing or bottoming taps, are ground with minimal lead threads so they can cut full threads to the bottom of a blind hole. This tap is suited for threading through-holes and blind holes in ferrous and non-ferrous metals. Machinists, pipefitters, maintenance technicians, and fabricators reach for this tool when a job calls for a complete metric thread profile in the M33 diameter range with a 3.50 mm pitch.
This tap is used in machine shops, fabrication facilities, and industrial maintenance settings where metric fastener threads must be cut accurately. It is appropriate for hand tapping with a tap wrench or for use with a tapping head on a drill press or milling machine. The M33.0 x 3.50 thread form is a coarse-pitch metric designation commonly encountered in heavy machinery, structural assemblies, and large-diameter fastener applications.
Designed as a standard M33.0 x 3.50 metric bottom tap suitable for use wherever that thread designation is required in metal threading applications.
Always secure the workpiece firmly and align the tap perpendicular to the hole before beginning. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Back the tap out periodically to clear chips, especially in deep blind holes. Follow applicable shop safety practices and wear eye protection when hand or machine tapping.
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