Value Collection JY4841201 Hand Tap 5/16-27 Uns Plug Hss

Product Description

The VALUE COLLECTION JY4841201 is a 5/16-27 UNS straight flute hand tap designed for cutting internal threads in through or blind holes. Built from high speed steel with a bright uncoated finish, this tap delivers reliable performance in a range of ferrous and non-ferrous materials. The plug chamfer — typically 3 to 5 threads of lead — makes it suitable for starting in through holes and continuing thread formation where a taper tap is not required. With 4 straight flutes and a Class 3B fit at H3 thread limit, it produces close-tolerance internal threads consistent with standard UNS specifications. Overall length is 2-23/32 inches. Machinists, toolroom technicians, and maintenance mechanics use this tap for hand tapping operations.

This tap is intended for hand tapping applications requiring a 5/16-27 UNS thread form. It suits maintenance and repair work, custom fabrication, and toolroom use where a standard non-metric thread pitch is specified. The right-hand thread direction and 3B tolerance class make it appropriate for general-purpose fastener applications where moderate thread fit and dimensional consistency are required. It is sold as a single tap.

Key Features

• 5/16-27 UNS thread size with right-hand thread direction
• Plug chamfer (3 to 5 thread lead) for through-hole and general tapping
• 4 straight flutes for chip clearance in standard hand tapping
• High speed steel construction for durability across a range of workpiece materials
• Bright uncoated finish — no coating additives that could affect thread dimensions
• Class 3B fit, H3 thread limit for close-tolerance internal thread production

Compatibility

Designed for use in hand tapping operations requiring a 5/16-27 UNS internal thread form. Compatible with standard tap wrenches and T-handle holders sized for the tap shank.

Installation Notes

Hand tapping should be performed by a machinist or skilled technician using a properly sized tap wrench. Secure the workpiece before tapping and align the tap square to the hole to avoid thread cross-cutting or tap breakage. Apply an appropriate cutting fluid for the workpiece material to reduce friction and extend tap life. Back the tap off periodically to break chips and prevent binding, especially in deeper holes.