Value Collection JY4840328 1/4-32 Unef Hand Tap Hss

Product Description

The VALUE COLLECTION JY4840328 is a 1/4-32 UNEF straight flute hand tap designed for cutting internal threads by hand or with a tap wrench in both ferrous and non-ferrous materials. Built from high speed steel (HSS) with a bright uncoated finish, this tap features a plug chamfer with 4 to 5 lead threads that allow entry into a pre-drilled hole and progressive thread engagement. The H3 thread limit designates a tolerance class that supports a fit appropriate for most standard threaded fastener applications. With an overall length of 2.5 inches and a right-hand thread direction, this tap is sized for precision work in the 1/4-32 extra-fine thread series. Machinists, maintenance technicians, and toolroom professionals use this style of tap for repair threading and production hand-tapping operations.

This tap is suited for threading work in light-duty assemblies, instrument components, and precision mechanical applications where the 1/4-32 UNEF thread form is specified. The straight flute geometry makes it appropriate for use in through-holes and blind holes in softer materials such as aluminum, brass, mild steel, and plastics. It is commonly used in maintenance and repair operations (MRO) as well as light production environments where hand tapping or low-speed machine tapping is performed.

Key Features

• 1/4-32 UNEF right-hand thread form for extra-fine pitch thread cutting
• Plug chamfer with 4 to 5 lead threads for progressive hole entry
• H3 thread limit for standard tolerance fit control
• 4-flute straight flute design suited for through-holes and blind holes in softer materials
• High speed steel construction provides durability across a range of common workpiece materials
• Bright uncoated finish — no coating buildup to affect thread tolerance

Compatibility

Designed as an OEM-style replacement or standard production tap for use in any application specifying a 1/4-32 UNEF straight flute hand tap with H3 thread limit.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard tap wrench or T-handle. Always start the tap square to the workpiece surface and use appropriate cutting fluid to extend tool life and improve thread finish. Ensure the pilot hole is drilled to the correct tap drill diameter for 1/4-32 UNEF before starting the tap. Back the tap off periodically to break chips, especially in blind-hole applications.