Kennametal 4130578 M30x3.50 Hand Tap Plug Rh 6H Hss

Product Description

The KENNAMETAL 4130578 is a straight-flute hand tap designed for cutting M30x3.50 Metric Coarse internal threads in a right-hand direction. Built from high-speed steel (HSS) with a bright uncoated finish, this 4-flute tap delivers consistent thread geometry in a range of metalworking applications. The plug chamfer style provides a gradual lead-in with several partial threads at the start, making it suitable for through-hole tapping where the tool can pass completely through the workpiece. The tap carries a Class of Fit designation of 6H and a Thread Limit of D9, ensuring threads fall within standard tolerance for metric fastener fitment. Overall length is 5.44 inches, with a thread length of 2.563 inches.

This hand tap is used in machine shops, maintenance facilities, and production environments where M30 metric coarse threads are required. It is suited for tapping cast iron and non-ferrous metals, as indicated by the manufacturer material application data. The straight-flute design makes it appropriate for through-hole applications and for use in materials that produce short, brittle chips. It is intended for hand tapping operations or low-speed machine tapping setups where controlled feed and chip management are priorities.

Key Features

• M30x3.50 Metric Coarse thread form for standard metric fastener compatibility
• High-speed steel construction provides durability across cast iron and non-ferrous metal workpieces
• Plug chamfer (partial thread lead-in) suits through-hole tapping applications
• 4-flute straight-flute geometry supports chip control in brittle materials
• 6H Class of Fit and D9 Thread Limit meet standard metric tolerance requirements
• Bright uncoated finish — no coating buildup affecting thread dimension accuracy

Compatibility

Designed for M30x3.50 Metric Coarse through-hole tapping in cast iron and non-ferrous metal workpieces. Suitable for hand tapping operations and low-speed machine tapping setups requiring 6H tolerance class threads.

Installation Notes

This tap should be installed and operated by a qualified machinist or tooling professional. Always secure the workpiece fully before beginning the tapping operation, and use the appropriate tap wrench or tapping attachment sized for the shank diameter. Apply a suitable cutting fluid for the workpiece material to reduce heat and extend tool life. Back the tap out periodically to break and clear chips during deep or blind-hole applications.