Value Collection MSC-04681185 Nut Tap 5/16-18 Unc Hss

Product Description

The VALUE COLLECTION MSC-04681185 is a nut tap designed for cutting internal threads in nut blanks and through-hole applications. Built from high-speed steel with a bright finish, this tap produces 5/16-18 UNC threads using 4 flutes to distribute cutting load and clear chips efficiently. It measures 5.5 inches in overall length with a 1.8125-inch thread length, giving the operator enough shank to handle in a tap wrench or machine holder. The H3 thread limit provides a tolerance class suited for general-purpose threading in ferrous and non-ferrous metals. Licensed machinists, maintenance technicians, and tool-and-die tradespeople are the primary users.

This nut tap is suited for production and repair threading in shop environments where 5/16-18 UNC fastener sizes are standard. The through-hole geometry allows cut material to pass up and out of the nut blank as the tap advances, making it well matched to high-volume nut tapping on manual or CNC equipment. It is appropriate for use in steel, aluminum, brass, and similar machinable materials where UNC coarse-pitch threads are specified.

Key Features

• 5/16-18 UNC thread form for coarse-pitch fastener applications
• 4-flute design distributes cutting load and promotes chip evacuation
• High-speed steel construction provides wear resistance across a range of workpiece materials
• H3 thread limit for general-purpose tolerance fit
• Bright finish — no coating to add dimensional build-up on cutting edges
• 5.5-inch overall length accommodates standard tap wrench and machine holder setups

Compatibility

Designed as a standard nut tap for through-hole threading operations requiring 5/16-18 UNC coarse-pitch threads in production or maintenance machining applications.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians using a tap wrench, tapping head, or CNC rigid-tap cycle. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for 5/16-18 UNC before starting. Apply appropriate cutting fluid to extend tool life and improve thread finish. Inspect the tap for chipping or wear before each use and replace if cutting edges are compromised.