Value Collection JY4842209 Straight Flute Tap 3/8-20 Uns

Product Description

The VALUE COLLECTION JY4842209 is a straight flute tap designed to cut 3/8-20 UNS internal threads in through-holes and blind holes where chip evacuation is manageable. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers reliable performance across a range of ferrous and non-ferrous workpiece materials. The plug chamfer — typically 3 to 5 threads of lead — makes this tap well-suited for through-hole applications where partial thread engagement at entry is acceptable. With an H3 thread limit, it produces threads in the middle tolerance range of the 3B fit class, giving machinists consistent clearance for standard fastener assembly.

This tap is used in general machining and maintenance environments wherever 3/8-20 UNS threads are required — including custom thread applications that fall outside the standard UNC and UNF series. Typical install scenarios include repair work, prototype fabrication, and production runs in machine shops, maintenance facilities, and tool rooms. It is installed by machinists and maintenance professionals using a standard tap wrench, tapping head, or CNC rigid-tapping setup. Right-hand thread direction matches conventional fastener rotation.

Key Features

• 3/8-20 UNS thread form for non-standard pitch applications outside UNC and UNF series
• 4 straight flutes provide strength and chip clearance in through-hole tapping operations
• Plug chamfer provides gradual thread engagement for through-hole and open-ended blind-hole work
• H3 thread limit ensures consistent 3B class of fit across production runs
• HSS construction supports use at moderate cutting speeds in a variety of materials
• Bright, uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed as a standard replacement or production tap for any application requiring a right-hand 3/8-20 UNS internal thread with a 3B class of fit.

Installation Notes

Always secure the workpiece firmly and use appropriate cutting fluid or tapping compound for the material being threaded. Power down or disengage the tapping head before changing taps or clearing chips. Do not force the tap if resistance increases suddenly — back off to break chips before continuing. Straight flute taps are best suited for through-holes or shallow blind holes where chips can exit freely.