Value Collection JY4840948 Straight Flute Tap 9/32-40 Uns

Product Description

The VALUE COLLECTION JY4840948 is a straight flute bottoming tap designed to cut 9/32-40 UNS internal threads in pre-drilled holes. Manufactured from high-speed steel with a bright/uncoated finish, this tap delivers reliable thread-cutting performance in a wide range of metals and plastics. The bottoming chamfer allows threads to be cut close to the bottom of a blind hole, making it suitable for tight-tolerance applications. With 4 flutes and an H2 thread limit, the tap maintains dimensional accuracy and a 3B class of fit, meeting standard requirements for most mechanical assemblies. Overall length is 2-23/32 inches.

This tap is suited for machining, toolroom, and maintenance environments where precise internal threading is required. The 9/32-40 UNS thread form is used in specialty fastening applications that fall outside standard Unified National Coarse and Fine series. The bottoming chamfer makes this tap especially practical when threads must extend to the base of a blind hole with minimal runout. Right-hand thread direction is standard for conventional tapping operations. Installation is typically performed by machinists, toolroom technicians, or skilled maintenance trades.

Key Features

• Bottoming chamfer allows threading to the base of blind holes
• 9/32-40 UNS thread form for specialty fastening requirements
• 4 flutes for consistent chip formation and thread finish
• H2 thread limit supports accurate 3B class of fit
• High-speed steel construction for durability across common workpiece materials
• Bright/uncoated finish suitable for general-purpose tapping applications

Compatibility

Designed as a general-purpose replacement or stock tap for applications requiring 9/32-40 UNS internal right-hand threads with a 3B class of fit.

Installation Notes

Always secure the workpiece firmly before tapping and ensure the pilot hole diameter is correct for the 9/32-40 UNS thread form before beginning. Use a tapping fluid or cutting oil appropriate for the workpiece material to extend tool life and improve thread quality. Apply steady, consistent pressure with a tap wrench or machine tapping head, and back off periodically to break chips in blind-hole applications. Replace the tap if resistance increases sharply or if thread quality degrades, as forcing a worn tap risks breakage in the hole.