Value Collection JY4861142 Straight Flute Tap 1-1/16-12 Uns

Product Description

The VALUE COLLECTION JY4861142 is a straight flute plug tap designed for cutting internal threads in through-holes and moderately deep blind holes. Manufactured from high-speed steel with a bright, uncoated finish, this tap is ground to a 1-1/16-12 UNS thread form with a right-hand thread direction and an H4 thread limit for consistent, on-tolerance threads. With four flutes and a plug chamfer, it provides stable cutting action and is well suited to a range of ferrous and non-ferrous materials. The 5-1/8-inch overall length and 1-1/2-inch thread length accommodate standard tapping depths in most machining and maintenance applications. Machinists, tool-and-die makers, and maintenance professionals use this tap in hand-tapping and machine-tapping setups.

This tap is appropriate for general-purpose threading operations in production shops, maintenance facilities, and toolrooms. The 1-1/16-12 UNS thread is a unified national special form, commonly encountered in specialty fastener and aerospace-adjacent applications where a non-standard pitch on a larger diameter is required. The plug chamfer style makes it suitable as a starting tap or as the only tap used in through-hole applications. It handles both hand-tapping with a standard tap wrench and machine-tapping on a drill press, mill, or tapping machine at controlled speeds.

Key Features

• 1-1/16-12 UNS thread form with right-hand direction for specialty large-diameter threading
• High-speed steel construction provides wear resistance across a broad range of workpiece materials
• Plug chamfer (3-5 thread lead) suits both through-hole and moderately deep blind-hole tapping
• H4 thread limit ensures consistent fit tolerance on cut threads
• Four flutes offer good chip clearance and stable cutting geometry
• Bright, uncoated finish allows easy visual wear inspection and accepts aftermarket coatings if needed

Compatibility

Designed as a standard straight flute plug tap for use in any setup requiring a 1-1/16-12 UNS internal thread, including hand-tapping and machine-tapping operations with a compatible tap holder or chuck.

Installation Notes

Tapping should be performed by a qualified machinist following established speeds and feeds for the workpiece material and tap diameter. Always secure the workpiece fully before tapping and apply an appropriate cutting fluid to extend tap life and improve thread quality. For machine tapping, use a floating tap holder to compensate for minor spindle misalignment. Inspect the tap for chipping or wear before each use and replace if flute edges show signs of damage.