Value Collection MSC-04479085 Hand Tap 1-8 Unc Plug

Product Description

The VALUE COLLECTION MSC-04479085 is a 1-8 UNC straight-flute hand tap designed for cutting right-hand internal threads in a wide range of materials. Built from high speed steel with a bright uncoated finish, it delivers reliable thread-forming performance in general machining applications. The plug chamfer — featuring 3 to 5 chamfered threads — makes this tap well suited for through-hole threading where the tool can advance progressively into the workpiece. With 4 flutes and a Class 2B fit to Thread Limit H6, it produces threads that meet standard tolerance requirements for most fastener and assembly applications.

This hand tap is intended for use in manual tapping operations by machinists, toolmakers, maintenance technicians, and trade professionals working in shop or field environments. It is appropriate for threading ferrous and non-ferrous materials in through-hole configurations. The 2.5-inch thread length and 5.125-inch overall length accommodate standard tapping depths in production and repair work alike. It is sold individually and requires a tap wrench or suitable holder for operation.

Key Features

• 1-8 UNC thread form with right-hand cut and Class 2B fit tolerance
• Thread Limit H6 for consistent oversize control within standard allowances
• High speed steel construction provides hardness and wear resistance for general-purpose tapping
• Bright uncoated finish — no added coating to alter cutting geometry or dimensional tolerance
• Plug chamfer (3-5 threads) optimized for through-hole threading applications
• 4-flute straight flute design for chip control in moderate-depth tapping

Compatibility

Designed as a standard replacement or stock hand tap for 1-8 UNC through-hole threading operations. Compatible with any standard tap wrench or T-handle designed to accept the shank diameter appropriate for 1-inch taps.

Installation Notes

Hand taps should be installed in a properly sized tap wrench and advanced with steady, even pressure — reversing a quarter turn periodically to break chips. Ensure the workpiece is securely clamped and the tap is started square to the hole to avoid thread misalignment or tap breakage. Cutting fluid appropriate for the workpiece material is recommended to reduce friction and extend tool life. This tool is intended for manual operation; use in a power driver without a torque-limiting adapter is not advised.