Value Collection JY4742250 Hand Tap 3/8-24 Unf Plug 4-flute Hss

Product Description

The VALUE COLLECTION JY4742250 is a 3/8-24 UNF straight flute hand tap designed for cutting right-hand internal threads in a wide range of materials. Built from bright-finish high speed steel, this tap features a plug chamfer with 4 flutes and an H11 thread limit, making it well suited for through-hole and moderately deep blind-hole applications. The oversize grind of 0.005 inches accommodates thread tolerance stacking in precision assemblies. Overall length is 2-15/16 inches. Machinists, toolroom technicians, and maintenance mechanics rely on this configuration for general-purpose hand tapping where consistent thread geometry and tool durability are required.

This tap is intended for hand tapping operations on standard UNF 3/8-24 threaded holes. The plug chamfer, with its moderate lead-in, makes it appropriate for starting threads in through holes or beginning a threading sequence before a bottoming tap is used. It is commonly applied in metalworking, maintenance and repair, and light fabrication environments where right-hand unified fine threads are specified. The bright uncoated finish is suitable for use with cutting oils and standard tapping fluids across ferrous and non-ferrous workpieces.

Key Features

• 3/8-24 UNF right-hand thread form for unified fine thread applications
• Plug chamfer provides moderate lead-in, suitable for through holes and starting blind holes
• H11 thread limit oversize grind at 0.005 inches for controlled thread tolerance
• 4-flute straight flute geometry for chip clearance in general-purpose hand tapping
• High speed steel construction offers durability across a range of workpiece materials
• Bright uncoated finish compatible with standard cutting oils and tapping fluids

Compatibility

Designed as a standard replacement or supplemental hand tap for 3/8-24 UNF threaded hole applications in general metalworking, maintenance, and fabrication settings.

Installation Notes

Hand tapping should be performed by a machinist or qualified technician using a properly sized tap wrench and appropriate cutting fluid for the workpiece material. Ensure the tap is started perpendicular to the workpiece surface to avoid cross-threading or tap breakage. Back off the tap periodically to break chips, particularly in deeper holes. Do not force the tap if resistance increases suddenly, as high speed steel taps can fracture under excessive torque.