Hertel K008407AS Hand Tap 5/16-24 Unf Plug 4-flute Hss

Product Description

The HERTEL K008407AS is a 5/16-24 UNF straight-flute hand tap designed for cutting right-hand internal threads in a wide range of materials. Built from high speed steel with a bright, uncoated finish, this tap delivers consistent thread quality in general-purpose tapping applications. The plug chamfer (3-5 threads) makes it suitable for through-holes and moderately deep blind holes. With a 4-flute design and an H2 thread limit, it produces threads to tight tolerances with reliable chip clearance. Overall length is 2-23/32 inches with a 1-1/8-inch thread length, a 0.318-inch shank diameter, and a 0.238-inch square drive size.

This tap is used in machine shops, maintenance and repair operations, and production environments where 5/16-24 UNF threaded holes are required. It is a manual hand tap intended for use with a tap wrench or holder. Typical applications include threading steel, aluminum, brass, and similar machinable materials. The straight-flute geometry works well in through-hole and short blind-hole applications where chips can be backed out during the tapping cycle.

Key Features

• 5/16-24 UNF right-hand thread form for standard unified fine-pitch applications
• Plug chamfer with 3-5 thread lead for starting ease in through-holes and moderate blind holes
• 4-flute straight-flute design provides chip clearance and stable cutting action
• H2 thread limit for close-tolerance thread production
• High speed steel construction for durability across common machinable materials
• Bright, uncoated finish suitable for use with cutting oil or tapping fluid

Compatibility

Designed as a standard hand tap for use with any tap wrench or holder accepting a 0.318-inch round shank with a 0.238-inch square drive, and sized for 5/16-24 UNF threaded hole applications.

Installation Notes

This tap is intended for use by machinists and maintenance technicians using a tap wrench or adjustable tap holder. Secure the workpiece before tapping and ensure the correct pilot hole diameter is drilled per UNF tap drill charts prior to use. Apply an appropriate cutting oil or tapping fluid to reduce friction and extend tool life. Back the tap out periodically to break and clear chips, especially in deeper holes.