Value Collection JY4841334 Hand Tap 5/16-32 Unef Bottoming Hss

Product Description

The VALUE COLLECTION JY4841334 is a 5/16-32 bottoming hand tap designed for cutting internal threads in pre-drilled holes. It is manufactured from high speed steel with a bright uncoated finish and features a 4-flute straight flute geometry. The bottoming chamfer allows threading to the bottom of blind holes where plug or taper taps cannot reach. With an H3 thread limit, this tap holds tight tolerances appropriate for precision threading applications. The overall length is 2-23/32 inches. This tap is suited for use by machinists, tool and die makers, and maintenance technicians working in metal fabrication or repair environments.

This tap is intended for hand tapping operations requiring a 5/16-32 UNEF right-hand thread in materials where high speed steel provides adequate cutting performance. The straight flute design is best suited for through-hole and short blind-hole applications in softer metals and plastics. The bottoming chamfer makes it the appropriate choice when threads must extend to the base of a blind hole, typically used as the final tap in a three-tap sequence following a taper and a plug tap.

Key Features

• Bottoming chamfer for threading to the bottom of blind holes
• High speed steel construction provides durability across general-purpose tapping operations
• H3 thread limit for controlled tolerance on internal threads
• 4-flute straight flute design for clean chip handling in short blind and through-hole applications
• Bright uncoated finish — no coating buildup to affect thread tolerance
• Right-hand thread direction, 5/16-32 UNEF specification

Compatibility

Designed for use in standard hand tap holders and T-handle tap wrenches sized for 5/16-inch shank taps. Cuts 5/16-32 UNEF internal threads per Unified National Extra Fine thread standards.

Installation Notes

This tap is installed by a machinist or maintenance technician using a standard tap wrench or T-handle. Ensure the workpiece is securely clamped and the tap is started perpendicular to the hole to prevent thread misalignment or tap breakage. Apply appropriate cutting fluid for the material being threaded. When used in a three-tap sequence, the bottoming tap should follow the taper and plug taps to complete threading to the bottom of a blind hole.