Value Collection JY4871208 Hand Tap 1-5/16-20 Uns Hss

Product Description

The VALUE COLLECTION JY4871208 is a straight-flute hand tap designed for cutting 1-5/16-20 UNS internal threads in a wide range of materials. Built from high speed steel with a bright uncoated finish, this tap delivers consistent thread cutting performance in both production and maintenance environments. The plug chamfer — typically 3 to 5 threads — provides a balance between starting ease and thread engagement depth, making it a general-purpose choice for through holes and deeper blind holes where a starting or bottoming tap is not required. The 6-flute configuration increases the number of cutting edges, improving thread quality and reducing chatter in harder materials. Installed by machinists and maintenance technicians using a standard tap wrench or machine tapping setup.

This tap is suited for threading operations in ferrous and non-ferrous metals, plastics, and similar machinable materials where a 1-5/16-20 UNS thread form is specified. The UNS thread standard covers unified national special threads that fall outside the standard UNC and UNF series, making this tap appropriate for specialized fastener applications, repair work, and OEM production requiring this specific pitch. The right-hand thread direction is standard for conventional tapping. The 4-inch overall length provides adequate shank clearance for use in most tapping fixtures and CNC tapping arms.

Key Features

• 1-5/16-20 UNS thread size with right-hand thread direction for standard tapping operations
• Plug chamfer provides 3 to 5 thread lead for versatile use in through holes and deeper blind holes
• High speed steel construction handles a broad range of machinable materials
• 6-flute design increases cutting edges for improved thread finish and reduced deflection
• Bright uncoated finish — no coating buildup to affect thread tolerance in close-tolerance applications
• Class of fit 3B with H4 thread limit ensures accurate thread geometry for standard tolerance fits

Compatibility

Designed as an OEM-style replacement or production tap for applications requiring a 1-5/16-20 UNS internal thread with a 3B class of fit and H4 thread limit.

Installation Notes

Hand taps of this size should be installed by experienced machinists or maintenance technicians familiar with tapping operations. Always secure the workpiece and use a properly aligned tap wrench or tapping fixture to prevent tap breakage and thread distortion. Apply appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Inspect the tap for wear or chipping before each use — a damaged cutting edge on a tap this size can be difficult to detect visually but will produce out-of-tolerance threads.