Value Collection JY4848727 Straight Flute Tap 15/16-18 Uns

Product Description

The VALUE COLLECTION JY4848727 is a straight flute tap designed to cut internal threads in ferrous and non-ferrous materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it produces 15/16-18 UNS right-hand threads to a 3B class of fit with an H4 thread limit. The four-flute, plug chamfer configuration provides a moderate lead-in — typically 3 to 5 chamfered threads — making it suitable for through-holes and deeper blind holes where chip clearance is manageable. Overall length is 4-29/32 inches. This tap is a standard production tool used by machinists, maintenance technicians, and toolroom professionals working to UNS thread specifications.

This tap is used in machine shop, MRO, and field maintenance applications where UNS (Unified National Special) threading is required. The 15/16-18 UNS designation calls for a non-standard pitch on a 15/16-inch nominal diameter, which appears in specialized mechanical assemblies, hydraulic fittings, and custom-engineered components. The plug chamfer makes it a versatile choice for general-purpose tapping in both manual and machine operations. It is appropriate for use in steel, cast iron, aluminum, and similar machinable materials.

Key Features

• 15/16-18 UNS thread form, right-hand direction, 3B class of fit
• H4 thread limit for controlled tolerance in standard production applications
• 4-flute straight flute design for chip management in through-hole and blind-hole work
• Plug chamfer (3 to 5 threads) for versatile through-hole and deeper blind-hole tapping
• High-speed steel construction for durability across a range of machinable metals
• Bright/uncoated finish — ready for use as-supplied with standard cutting fluids

Compatibility

Designed as a standard replacement or production tap for applications requiring 15/16-18 UNS internal threading. Compatible with standard tap holders and tapping heads that accept this shank size and overall length.

Installation Notes

This tap should be installed and operated by qualified machinists or maintenance technicians familiar with threading operations. Always secure the workpiece and use appropriate cutting fluid for the material being tapped. Operate at speeds and feeds appropriate for the material and tap diameter — consult a speeds-and-feeds reference before use. Inspect the tap for wear or damage before each use and do not force a tap that has stalled in the hole.